Texas National Guardsmen assist residents affected by flooding caused by Hurricane Harvey onto a military vehicle in Houston, Aug. 27. Army National Guard / Lt. Zachary West
There are certain climate change-related factors that we can, with great confidence, say worsened the flooding.
Sea level rise attributable to climate change (some is due to coastal subsidence due to human disturbance e.g. oil drilling) is more than half a foot over the past few decades.
That means that the storm surge was a half foot higher than it would have been just decades ago, meaning far more flooding and destruction.
In addition to that, sea surface temperatures in the region have risen about 0.5C (close to 1F) over the past few decades, from roughly 30C (86F) to 30.5C (87F), which contributed to the very warm sea surface temperatures (30.5-31 C or 87-88F). There is a simple thermodynamic relationship known as the Clausius-Clapeyron equation that tells us there is a roughly 3 percent increase in average atmospheric moisture content for each 0.5C (~1F) of warming. Sea surface temperatures in the area where Harvey intensified were 0.5-1C warmer than current-day average temperatures, which translates to 1-1.5C warmer than the "average" temperatures a few decades ago. That means 3-5 percent more moisture in the atmosphere.
That large amount of moisture meant the potential for much greater rainfalls and greater flooding.
The combination of coastal flooding and heavy rainfall is responsible for the devastating flooding that Houston is experiencing.
Not only are the surface waters of the Gulf unusually warm right now, but there is a deep layer of warm water that Harvey was able to feed upon when it intensified at near record pace as it neared the coast. Human-caused warming is penetrating down into the ocean warming not just the surface but creating deeper layers of warm water in the Gulf and elsewhere.
So Harvey was almost certainly more intense than it would have been in the absence of human- caused warming, which means stronger winds, more wind damage and a larger storm surge (as an example of how this works, we have shown that climate change has led to a dramatic increase in storm surge risk in New York City, making devastating events like Superstorm Sandy more likely.
Finally, the more tenuous but potentially relevant climate factors: Part of what has made Harvey such a devastating storm is the way it has stalled right near the coast, continuing to pummel Houston and surrounding regions with a seemingly endless deluge which will likely top out at nearly 4 feet of rainfall over a several days-long period before it is done.
The stalling is due to very weak prevailing winds which are failing to steer the storm off to sea, allowing it to spin around and wobble back and forth like a top with no direction. This pattern, in turn, is associated with a greatly expanded subtropical high pressure system over much of the U.S. right now, with the jet stream pushed well to the north. This pattern of subtropical expansion is predicted in model simulations of human-caused climate change.
More tenuous, but possibly relevant still, is the fact that very persistent, nearly "stationary" summer weather patterns of this sort, where weather anomalies (both high pressure dry hot regions and low-pressure stormy/rainy regions) stay locked in place for many days at a time, appears to be favored by human-caused climate change. We recently published on this phenomenon:
In conclusion, while we cannot say climate change "caused" hurricane Harvey (that is an ill-posed question), we can say that it exacerbate several characteristics of the storm in a way that greatly increased the risk of damage and loss of life.
Climate change worsened the impact of Hurricane Harvey.
By Michael E. Mann, Susan Joy Hassol and Tom Toles
It is easy to understand why advocates for climate action have become somewhat dispirited in recent months. In the space of less than a year, we've seen the U.S. go from playing a leading role in international climate negotiations to now being the only nation in the world to renege on its commitment to the 2015 Paris climate accord.
It is in this environment of defeat and despair that we've witnessed a dramatic rise in the prominence of climate doomism—commentary that portrays climate change not just as a threat that requires an urgent response but also as an essentially lost cause, a hopeless fight. Some of the more egregious examples can be found among fringe characters such as ecologist Guy McPherson—a doomist cult hero who insists that exponential climate change likely will render human beings and all other species extinct within 10 years.
Climate Doomsday Essay 'Is Exactly What We Don't Need' https://t.co/rPhsJqs3yG @greenpeaceusa @SierraClub @foe_us @MichaelEMann @350— EcoWatch (@EcoWatch)1499952025.0
Such rhetoric is in many ways as pernicious as outright climate change denial, for it leads us down the same path of inaction. Whether climate change is a hoax (as President Trump has asserted) or beyond our control (as McPherson insists), there would obviously be no reason to cut carbon emissions.
Doomist narratives, albeit of a more nuanced and subtle variety, are now starting to appear in respected, mainstream venues, written by otherwise able and thoughtful journalists. In this vein comes a recent New York Magazine article The Uninhabitable Earth by David Wallace-Wells.
It is important to be up front about the risks of unmitigated climate change, and it is critical to keep in mind the potential for unpleasant surprises and worst-case scenarios, the so-called fat tail of risk. It is, moreover, appropriate to criticize those who understate the risks. But there is also a danger in overstatement that presents the problem as unsolvable and future outcomes as inevitable.
The New York magazine article paints an overly bleak picture, arguing that climate change could render the Earth uninhabitable by the end of this century. Its opening story about the "flooding" of a seed vault in Norway leaves out that one of the vault's creators told NPR "there was really no flood." It exaggerates the near-term threat of climate "feedbacks" involving the release of frozen methane. It mischaracterizes one recent study as demonstrating that the globe is warming "more than twice as fast as scientists had thought," when in fact the study in question simply showed that one dataset that had tended to show less warming than other datasets has now been brought in line with the others after some problems were corrected for. The warming of the globe is progressing as models predicted. And that is plenty bad enough.
The evidence that climate change is a serious challenge that we must tackle now is very clear. There is no need to overstate it, particularly when it feeds a paralyzing narrative of doom and hopelessness. Some seem to think that people need to be shocked and frightened to get them to engage with climate change. But research shows that the most motivating emotions are worry, interest and hope. Importantly, fear does not motivate, and appealing to it is often counter-productive as it tends to distance people from the problem, leading them to disengage, doubt and even dismiss it.
It is important to communicate both the threat and the opportunity in the climate challenge. Those paying attention are worried, and should be, but there are also reasons for hope. The active engagement of many cities, states and corporations, and the commitments of virtually every nation (minus one) is a very hopeful sign. The rapid movement in the global energy market towards cleaner options is another. Experts are laying out pathways to avoid disastrous levels of climate change and clearly expressing the urgency of action. There is still time to avoid the worst outcomes, if we act boldly now, not out of fear, but out of confidence that the future is largely in our hands.
Michael E. Mann is distinguished professor of atmospheric science at Pennsylvania State University and director of the Penn State Earth System Science Center. Susan Joy Hassol is the director of Climate Communication LLC. Tom Toles is the editorial cartoonist for The Post.
Solar power has been an energy source of growing importance in recent years, as technology has advanced and the cost of solar panels has declined sharply. As a result, many smaller sun-powered products have become available, from solar phone chargers to solar generators to outdoor solar lights.
Whether you're looking for ground lights or flood lights, illuminating your outdoor spaces with a wired system can be both an electrical challenge and an eyesore. Convenience, sleekness and sustainability are just a few reasons so many people are looking for the best outdoor solar lights.
In this article, we'll go over how solar lights work, show you some of the best solar lights available and help you decide whether solar-powered lighting is a good choice for your home.
6 Best Outdoor Solar Lights
The below table provides a quick summary of our recommendations for the best outdoor solar lights across six unique categories. We chose these products based on criteria including durability, ease of installation, ease of use, run time, cost and more.
|Best Outdoor Solar Lights||Our Award||Buy Now|
|Solpex Solar Ground Lights||Best Overall||Check Price|
|Brightech Ambience Pro||Best String Lights||Check Price|
|Beau Jardin Solar Pathway Lights||Best Path Lights||Check Price|
|AmeriTop Motion-Sensor Lights||Best Flood Light||Check Price|
|Brightown Solar-Powered Fairy Lights||Best Fairy Lights||Check Price|
|Sunnest Stainless Steel Outdoor Solar Lights||Best Lights Under $20||Check Price|
To dig into the advantages and disadvantages of each of these models specifically, keep reading.
Best Overall: Solpex Solar Ground Lights
Solpex's outdoor in-ground solar lights provide bright illumination without getting in the way or even really being noticeable until they're turned on. The high-quality system is designed to be exceedingly easy to install, is extremely durable in material and operates with ease, turning on automatically and running from dusk to dawn. Solpex's bright LED bulbs are perfect for providing your yard with guiding light year-round.
- Easy to install
- Weather-resistant and durable
- Efficient and effective
- More expensive than some competitors' models
- In-ground lights need more maintenance to keep clean and clear
Why Buy: If you're looking for an in-ground solar garden light that will truly wow your guests when they turn on, the Solpex Solar Ground Lights could be your best pick.
Best String Lights: Brightech Ambience Pro
String lights can be the perfect mood-setter, and using the Brightech Ambience Pro solar powered string lights ensures that you brighten your space reliably and efficiently. With a thorough two-year warranty and extensive weatherproofing and shatterproofing, these lights will hold up through most weather conditions while still appearing delicate enough for any setting — romantic, celebratory, relaxed or otherwise.
- Long lifetime
- Flexibility in installation and design thanks to clip-on bulbs
- Decorative cozy feel
- May not provide enough light for safety or security applications
- Heavier than non-solar string lights
Why Buy: To fill your outdoor space with a warm ambiance, Brightech's solar-powered outdoor string lights are a great option. The Edison bulbs give off a vintage feel that your guests are sure to appreciate.
Best Path Lights: Beau Jardin Solar Pathway Lights
To dot a pathway, garden or outdoor patio, using solar outdoor lighting eliminates the need for fragile and cumbersome wiring, and the Beau Jardin Solar Pathway Lights are some of the best ones out there at an affordable price. These solar path lights take seconds to install — simply use the spike to insert them directly into the ground — and are built to last for years.
- Easy installation
- Great value for money
- Extensive battery life
- Stylish appearance
- Made of plastic, so not as durable as more robust materials
- Provide accent lighting rather than full illumination that may be needed for some pathways
Why Buy: The Beau Jardin Solar Pathway Lights are the best outdoor solar lights if you're looking for affordability and quick installation. They're ideal for accent lighting during the darker hours, and buying multiple packs can allow you to light up a wider area.
Best Flood Light: AmeriTop Motion-Sensor Lights
Floodlights are critical for outdoor security, but if the lights burn out or aren't illuminating enough, then they can't do their job. That's why solar floodlights, and specifically the AmeriTop Motion-Sensor Lights, get high marks from us. They provide a wide angle of light to illuminate an expansive area brightly, and they do so using motion sensors in durable, waterproof fixtures.
- Wide angle is great for security
- Built-in motion sensor requires no additional power
- Highly durable, weatherproof design
- Designed for function rather than decoration, so they may not fit into your outdoor style
- Doesn't provide constant light (only on a motion sensor basis) so may not work for steady light applications
Why Buy: Floodlights can be critical for outdoor safety, and the AmeriTop Motion-Sensor Lights accomplish that efficiently with solar energy and built-in motion detection. We recommend them as the best outdoor lights to illuminate your entire yard for safety.
Best Fairy Lights: Brightown Solar-Powered Fairy Lights
Fairy lights provide the perfect touch of style and design to an outdoor area, and moving to solar lights eliminates the frustrating constraints of having to plug them in. We recommend the Brightown Solar-Powered Fairy Lights because of their quick charging, flexible design and warm light that's perfect to decorate for holidays, barbecues, parties, weddings and more. They also have eight light modes that range from slow fades to steady twinkling.
- Easy to shape into different designs
- Multiple lighting modes and patterns for customizability
- Great price
- More delicate in construction
- May not hold up as well in heavy snow or flooding
Why Buy: Solar-powered fairy lights are the perfect decorative addition to a yard or patio, and the flexibility the Brightown Solar-Powered Fairy Lights offer in design and operation can't be beaten for the price.
Best Lights Under $20: Sunnest Stainless Steel Outdoor Solar Lights
The best solar-powered outdoor lights don't have to break the bank. Sunnest's stainless steel landscape lights come in a pack of 12 for under $20 yet still deliver great functionality, appearance and ease of use. They can be installed to illuminate pathways, gardens or other outdoor areas.
- Attractive in design with cool white lights
- Ready to install in seconds
- Cheaper price means less durable over the long term when up against the elements
- Provides accent levels of lighting rather than full illumination
Why Buy: If you want to dip your toes into the solar outdoor light area without investing a lot of money right away, the Sunnest Stainless Steel Outdoor Solar Lights are your best bet to enjoy that initial experience and get hooked into more solar light solutions.
How Do Outdoor Solar Lights Work?
When choosing the best outdoor solar lights for your yard, it may be helpful to understand how these solar panels work.
You may have seen traditional solar panel installations on the rooftops of homes around you, businesses at which you shop or even installed in large outdoor solar farms owned by utilities. What's particularly intriguing about solar lights is that the technology used is more or less the same as these large-scale panels that are powering entire buildings.
Regardless of the size of a solar panel, it contains solar cells, which are made up of unique semiconductor materials like silicon. When sunlight strikes the cell, some of that energy is absorbed by the material via electrons being knocked loose and being able to flow freely (otherwise known as electricity!).
While standard types of solar panels may contain 36 to 48 solar cells connected together, solar lights are smaller in size and require much less electricity to run (particularly when paired with energy-efficient LED lights). The typical solar light will therefore use just four solar cells, but that's really the only difference from a solar technology basis.
The rest of the solar light comprises a battery, controller board, photoresistor and the light itself. During the sunny daytime hours, the four-cell solar panel will charge up the battery, typically receiving more than enough juice to run for the entire night.
The photoresistor's job is then to detect when light is no longer hitting the solar panel, at which point two things will happen: 1) the battery will stop getting charged, and 2) the controller board will tell the light to turn on. In that way, the solar light is always either charging or illuminating.
When morning strikes and the sun hits the photoresistor once again, the controller board will send a message to turn off the light, and the battery will begin accepting its daytime charge.
Types of Outdoor Solar Lights
Outdoor solar lights are a broad category, filling lots of niche needs and popping up in new opportune areas as the technology continues to improve. Because of their low installation threshold, falling prices and efficiency, solar outdoor lighting solutions can be ideal for countless scenarios, including (but not limited to) the following:
- Ground lights
- Path lights
- Landscape lights
- Motion or security lights
- Fairy lights
- String lights
- Hanging lights
- Post lights
Homeowners deciding which style of outdoor solar light they want to install should consider all the same factors as they would with traditional lighting technologies: What areas do they need to be illuminated for safety? What fits into the aesthetic of the outdoor area? What security needs can lights fill?
The advantage is that homeowners wise enough to go the route of solar lights will have fewer headaches with installation, will have their lighting last for a longer period of time before it needs to be replaced and can easily change their minds on lighting locations because no wiring is needed.
How Much Do the Best Outdoor Solar Lights Cost?
You may be sold on the technology and ease of outdoor solar lights, but how much will it set you back to purchase the best option out there? As with any advancing technology, the answer to that question can vary significantly depending on the choices you make. The answers to these questions, for example, will all have a material impact on price:
- How bright (i.e., how many lumens) do you need the lights to be?
- How efficient do you want the lights to be?
- How durable do you need the lights to be?
- How top-of-the-line do you want the materials and decorative nature to be?
For the bulk of the outdoor solar light market, regardless of your answers, each light system will typically cost between $20 and $50. If you really want to go with a high-tech system (which could mean higher-capacity batteries, more intelligent functionality, intricate customizations and more), it could end up costing over $200.
The best approach is to analyze your specific needs and then purchase accordingly.
Choosing the Best Outdoor Solar Lights for Your Home
According to the U.S. Department of Energy, outdoor solar lighting works quite well in most areas of the U.S., as it doesn't require an excessive amount of sunlight to charge up and work. This means that even on cloudy days or during winter, you'll still be able to light your way. Solar light adopters aren't only helping the environment, but they're also saving money via reduced energy consumption.
If you're ready to make the switch, identifying the best solar lights for your specific home and need is no small task. When picking the best outdoor solar nights for your need, some characteristics you're going to have to make decisions on include:
- Design, style and aesthetics
- Size of fixture
- Ease of use and control after installation (remote-controlled, connected to in-home smart device, manually controlled, etc.)
- Durability to weather and general wear and tear
- Expected lifetime before replacements are needed
- Overall system cost
FAQ: Best Outdoor Solar Lights
What are the brightest outdoor solar lights?
If you want the brightest outdoor solar lights, you'll want to look at floodlights or spotlights. These often have a higher lumen count and can light spaces better than string or ground lights. Our pick for the best solar-powered floodlight is the AmeriTop Motion-Sensor Light.
What is the best outdoor solar lighting?
We named the Solpex Solar Ground Lights the best overall choice for outdoor solar lighting. These lights are easy to install, ultra-efficient and hold up well in the elements.
What should I look for in outdoor solar lights?
When choosing the best outdoor solar lights for your home, consider factors such as design, brightness, durability and cost.
Do outdoor solar lights really work?
Yes, outdoor solar lights work just as well as traditional outdoor lights. According to the DOE, solar-powered outdoor lights work well in most areas of the U.S. because they don't require much sunlight. This means that even if you live somewhere with more gray days than sunny ones, you can still harness the sun's power to light your outdoor space.
It's an honor to address this group of distinguished faculty, proud parents, supportive family members and friends.
We're gathered here in this idyllic location to celebrate the accomplishments of these young adults as they successfully complete one great challenge and prepare for others to come.
So please join me in congratulating Green Mountain College's (GMC) Class of 2017.
I'm especially honored to be giving the commencement speech at Green Mountain College for at least two reasons.
First of all, this is my home—broadly speaking.
I grew up in the foothills of the Green Mountains. Well, those of us in the slightly less "green" state of Massachusetts call them the Berkshires—but it is the same mountain range, the same magical small corner of the world.
Growing up in the town of Amherst, Massachusetts 100 miles southeast of here, I gained an appreciation for the wonder of nature hiking those mountains, wading in those streams, bicycling up and down those same hills.
I was an avid cyclist—though I didn't rack up the 4,000 miles a year that your president does.
Really? 4,000 miles a year President Allen?? [looking at him]
Have you tallied the carbon footprint of all of that respiration? I did (the nerd in me couldn't possibly resist). It's 95 entire kilograms of CO2 equivalent.
I hope that's been accounted for in GMC's carbon footprint estimates.
But let me get back on message…
The other reason I am so delighted to be here has to do with what Green Mountain College represents. Even the name of the college seems to speak unapologetically to its vision and its mission.
And GMC proudly advertises itself as "First in Sustainability."
Now talk is cheap of course. But GMC—and its students and graduates—haven't just talked the talk. They've walked the walk.
In this year's graduating class, for example, is a young woman named Keeley Titus. Keeley resided on the "sustainability floor" of her residence hall, which is built around locally raised food.
I have to say, I just love this story.
Keeley bottle-fed from birth two Nigerian dwarf goats named Margaret and Rose who reside at the college's farm. She's fed them 4 times a day. They are now old enough that Keely can produce fresh milk and cheese from them.
Keeley came to GMC because she wasn't interested in conventional programs focusing on big ag. She wanted to learn how to replicate sustainable food systems at the smaller mid-scale.
As Keeley notes, "I think that's the way we're moving as a country."
I think she's right. But only because of the efforts by her and other young leaders who are driven by the vision of a sustainable future—a vision undoubtedly nurtured by their experiences here at GMC.
For over two decades, this college has demonstrated an unmatched commitment to environmental, social and economic sustainability.
Amazingly, with an enrollment of only about 800 students (for the record—that's roughly the same size as my high school), the college offers majors in Environmental Studies, Renewable Energy & Ecological Design, Wilderness & Outdoor Therapy, Sustainable Agriculture & Food Production, Animal Conservation & Care and numerous minor options in the environmental and sustainability space. Students can also design their own majors.
But even more impressive is the way the college integrates the theme of environmental sustainability throughout students' educational experience via its unique Environmental Liberal Arts curriculum.
Students of all majors learn about the importance of social and ecological sustainability through coursework that stresses critical thinking, analysis and written expression.
And outside of class, the learning continues in the form of outings and field trips, and service learning projects.
This integrated focus creates a shared sense of purpose—because here, the environment is 100 percent relevant to every field.
The Association for the Advancement of Sustainability in Higher Education awarded Green Mountain College the Campus Sustainability Leadership Award in 2007 for—and I quote:
"Commitment to environmental sustainability in its governance and administration, curriculum and research, operations, campus culture, and community outreach."
Green Mountain was named an EPA Energy Star Showcase Campus.
That GMC has received such accolades is not incidental.
Let me stress, once again, that GMC walks the walk. It recognizes:
1. Little Things Add Up! Like the recent campus-wide retrofitting of light fixtures and students have installed a wind turbine to power the campus green house and solar panel on the roof of the student center.
2. Student Engagement is Critical: Through the Student Campus Greening Fund (SCGF) every GMC student contributes $30 from the college activities fee. Students design projects and submit proposals. Awards are based on a student vote. SCGF money has been used to install bike racks, purchase recycling bins, use bio-diesel in campus maintenance equipment and upgrade the alternative energy systems that power the farm greenhouse.
3. We Need to Think Big: Seven years ago, GMC opened a new combined heat and power biomass plant costing $5.8m.
4. Commitments Must be Actionable: In 2011, GMC became climate neutral. Only the second college in the nation to achieve this goal, and the first to do so through a significant reduction in on-site emissions achieved through efficiency, adoption of clean energy, and purchase of quantifiable local carbon offsets.
5. Peer Pressure Works: GMC's achievement of carbon neutrality in 2011 was followed by Colby College of Maine in 2013, and late last year, close-by Middlebury College.
In the end, though, it really comes down to the people. GMC's faculty are of course top notch and include leading thinkers, educators and practitioners in the sustainability space.
But it's truly the students who make GMC so special.
In recent years, GMC students have done internships with the Boston Aquarium, the Nature Conservancy, the United Nations, the Office of U.S. Senator Bernie Sanders.
They've done internships with Green Mountain Power and Duke Energy. Yes—sometimes change can come from within.
And so many of GMCs graduates are now working productively in the area of environmental sustainability.
Take for example Joe Bossen, class of 2008. As a student, he experimented with small community-based coop. After graduation he founded a company called "Vermont Bean Crafters"—as Joe puts it "joyfully serving the tastiest in local, organic and plant-based food."
Joe was named Vermont Young Entrepreneur of the Year by the Vermont Small Business Association in 2014.
Some of us grew up being told it's not easy being green.
But Joe is shining example that, with a bit of creativity, you can excel in both business and sustainability in today's world.
Or take Allan Coutinho—one of last year's graduates. Allan is a Brazilian native who was attracted by GMC's mission of social and environmental sustainability. He crafted a self-designed major that merged his interests in education and sustainable development. And he was the head of GMC's award-winning delegation to the UN's Model United Nations program.
He is now pursuing graduate studies at Harvard. He has said he doesn't think another school would have given him so many opportunities. And I suspect he's right about that.
Here are what a few other GMC graduates are doing today:
Kim Barrett—class of 2014, director of Kehoe Green Mountain Conservation Camp in Vermont.
Tori Knoss—class of 2012, naturalist, Pacific Whale Foundation, Maui, Hawaii.
Cory Cheever—class of 2008, environmental educator, Vermont Institute of Natural Science.
Keith Drinkwine—class of 2010, assistant director of Camps, Parks, & Forest, N.Y. State Dept. of Environmental Conservation.
Mindy Blank—class of 2010, adjunct professor of Environmental Studies at GMC. She participated in the history-making COP21 climate meeting in Paris in December 2015. She has also worked for the International Energy Agency helping countries accelerate the deployment of renewable energy.
The list goes on. And an impressive list it is.
At a time when our environment is most imperiled, your work—class of 2017—is more important than ever.
Now, let me regale you with a story about my own college experience.
In 1984, after graduating from Amherst High School, I headed off to Berkeley.
To demonstrate against the policies of Ronald Reagan, you ask?
To participate in sit-ins protesting Apartheid in South Africa, you ask?
Alas, no, I didn't go to protest or demonstrate.
I went there to study applied math and physics among some of the world's leading experts.
And ironically, it was that path turned out to be the one that would lead me toward confrontation and battle.
I would go on to study theoretical physics in graduate school and to move into the then-burgeoning field of climate research.
My path of discovery would ultimately lead to me to publish the now iconic "Hockey Stick" curve in the late 1990s.
The curve tells an unmistakable story, namely that the current warming spike is unprecedented as far back as we can go. Our continued burning of fossil fuels is the culprit.
And fossil fuel interests and front groups and politicians doing their bidding attacked it—and me.
Despite the numerous independent confirmations of my findings by the U.S. National Academy of Sciences and dozens of other assessments, the effort to discredit this research—and to discredit me personally—has continued.
I was initially reluctant about being at the center of the fractious societal debate over human-caused climate change.
But I have ultimately come to embrace that role. I have become convinced that there is no more noble pursuit we can engage in than to seek to insure that policy is informed by an objective assessment of scientific evidence.
That evidence now shows us that we face a stark choice, between a future with a little more climate change that we will still have to adapt to and cope with, and one with catastrophic climate change that will threaten the future of life as we know it.
And so here we are, at a crossroads.
Let me be blunt.
Never before have we witnessed science under the kind of assault it is being subject to right now in this country.
Nor have we witnessed an assault on the environment like the one we are witnessing in the current political atmosphere.
I will borrow and adapt—for our current time and place—the words of Martin Niemöller, a prominent Protestant pastor who emerged as an outspoken public foe of Adolf Hitler and spent the last seven years of Nazi rule in concentration camps:
First they came for the immigrants and I did not speak out—
Because I was not an immigrant.
Then they came for the scientists, and I did not speak out—
Because I was not a scientist.
Then they came for the environmentalists, and I did not speak out—
Because I was not an environmentalist.
Then they came for me—and there was no one left to speak for me.
Friends, let this not be our legacy.
Those of us who care about science and the role that science plays in our larger public discourse and those who care about environmental stewardship and a sustainable path forward must now make our voices heard.
Become involved. They are so many ways to speak out and to influence the dialogue. So many ways we can engage constructively with governmental, civic and corporate institutions in the realms of education, public policy and industry.
Past GMC graduates have gone on to become community planners, environmental lawyers, and directors of nonprofit organizations. Many now work for state and federal agencies or educational institutions.
Let me go just a bit further: Let me ask each of you to change the world for the better.
I am confident you will.
Godspeed to you all.
I coined the term "Serengeti Strategy" in my 2012 book The Hockey Stick and the Climate Wars. It's meant to describe how industry special interests and their patrons in power single out individual researchers or teams of scientists for attack, in much the same way lions of the Serengeti single out an individual zebra from the herd. In numbers, after all, there is strength, while individuals and small groups are far more vulnerable—and the purpose is two-fold: to undermine the credibility of wider scientific consensus and to discourage other researchers from sticking out their necks and participating in the public discourse over matters of policy-relevant science.
Science vs. white nationalist tabloids https://t.co/iSnreEWl3A via @EcoWatch https://t.co/9eHTco0Ile— Climate Nexus (@Climate Nexus)1486593124.0
When it comes to attacks on climate scientists specifically, this strategy follows a familiar script. On the eve of a critical Congressional vote, hearing or climate policy summit, a late-breaking "scandal" suddenly erupts. Individual scientists are typically charged with claims of misconduct, fraud or data manipulation and soon enough, right-wing blogs, climate-denying websites and the conservative establishment media are trumpeting the accusations. In time, more objective media outlets are forced to cover the uproar, lending it credibility and oxygen, even as it is responsibly dissected.
With the public conversation hijacked, meaningful progress on climate policy is blunted and the vested interests seeking to maintain our current addition to fossil fuels prevail.
The latest example of this strategy began unfolding earlier this month when David Rose, an opinion writer for the British tabloid The Daily Mail—known for misrepresentations of climate change and serial attacks on climate scientists—published a commentary attacking Tom Karl, the recently retired director of the National Centers for Environmental Information at the U.S. National Oceanic and Atmospheric Administration (NOAA) and a scientist for whom I have deep respect. Rose accused Karl and his co-authors of having "manipulated global warming data" in a 2015 study published in the journal Science. These charges were built entirely on an interview with a single disgruntled former NOAA employee, John Bates.
3 Reasons the Mail on Sunday’s Climate Claims Are Bogus https://t.co/zkdfValuOH @dotearth @ClimateDesk @FAOclimate— EcoWatch (@EcoWatch)1486594212.0
Rose's charges and Bates' allegations have since withered under scrutiny by journalists—and by the wider scientific community, which quickly noted that the findings of the 2015 Science paper have been independently and repeatedly, verified by other researchers. Bates' secondary claims that data from the Science paper had not been properly archived and that it was "rushed" to publication, have also fallen apart.
Still, the mission of this latest disinformation campaign has been accomplished and with its mooring in technical details too remote for casual news consumers to fully investigate, the headlines will nonetheless create additional drag on any well-meaning efforts to address climate change.
As a climate scientist, I should know. I've found myself at the center of such episodes more than once, as a result of what's become known as the iconic "hockey stick" diagram that my co-authors and I had published in the late 1990s—a graphic display of the data that made plain the unprecedented rate of global warming. While the hockey stick is hardly the basis of the case for human-caused climate change, the visually compelling character of the graphic has made it—and indeed me—a target of climate change deniers for years.
A version of the so-called hockey-stick diagram, made famous by the author—and attacked by his critics.
In the fall of 2003, just days before a critical U.S. Senate resolution to acknowledge the threat of human-caused climate change, an article in the journal Energy & Environment—regarded by many as a haven for climate skeptics —engaged in unsubstantiated attacks of the hockey stick. A group with ties to the fossil fuel industry published an op-ed trumpeting those criticisms in USA Today on the morning of the Senate vote. Sen. James Inhofe, the Oklahoma Republican who has described climate change as "the greatest hoax ever perpetrated on the American people," gleefully read the article aloud during the Senate floor debate. While the critique on the hockey stick would soon be summarily dismissed, it served the short-term purpose of hijacking the discussion and the bill did not pass.
My co-author Tom Toles (the Pulitzer-winning editorial cartoonist for the Washington Post) and I put it this way in the concluding chapter of our new book, The Madhouse Effect: How Climate Change Denial Is Threatening Our Planet, Destroying Our Politics and Driving Us Crazy.
In the current presidential contest, we could not have a more stark choice before us, between a candidate who rejects the overwhelming evidence that climate change is happening and a candidate who embraces the role of a price on carbon and incentives for renewable energy.
If you care about the planet, the choice would seem clear.
If the appropriate catch-phrase for the 1992 election was "It's The Economy Stupid!," then this time around it ought to be "It's the PLANET stupid!."
A Toles cartoon used in the Madhouse Effect conveys the point masterfully:
Preventing dangerous climate change remains a daunting challenge, but we've made some real progress in the past few years. Global carbon emissions are actually on the decline, renewable energy is dramatically on the rise, and we achieved a monumental international agreement in Paris last December that promises to help steer us onto a path that just may avert dangerous 2C planetary warming.
A pair of Toles cartoons from the Madhouse Effect conveys both the auspicious nature of these developments and their fragility in the current political environment:
In this next election, we need to decide whether we are going to build on the successes of the Obama administration—which has used a combination of bold executive actions and international diplomacy to achieve action on climate change even in the presence of intransigence, denial and outright hostility from congressional republicans—or whether we are going to retreat back into the energy-equivalent of the stone age, continuing to degrade our planet through the profligate burning of increasingly dangerous fossil carbon even as the rest of the world moves forward, embracing the renewable energy revolution destined to be the hallmark of the 21st century.
Once again, the decision comes down to a single election that is now just weeks away. In the first presidential debate, though the moderator disappointingly failed to ask a question about was is arguably the single most critical issue facing human civilization today—human-caused climate change—the Democratic nominee for President, Hillary Clinton, forced the issue herself by calling out Donald Trump for his denial of climate change, noting that he, for example, in a past tweet dismissed climate change as a hoax perpetrated by the Chinese (indeed Trump has posted at least a half-dozen climate change-denying tweets over the past few years).
Seemingly recognizing how self-discrediting it is to deny a phenomenon that people are now witnessing in their everyday lives, Trump denied having made the claim. But realizing that the damning evidence was available for everyone to see (via a tweet that remains in Trump's twitter feed), his campaign sought to quickly clarify the next day that, despite what he might have stated in the past, he no longer believes climate change to be a hoax. Progress, right? Unfortunately not. Consider, for context, this Toles cartoon from the book:
The Trump campaign, it turns out, simply gave us a bait-and-switch, attempting to pivot from one patently absurd climate change denial talking point ("it's not happening!") to a seemingly more palatable, albeit equally indefensible one ("it's natural, not human-caused!").To be clear, Donald Trump and his campaign still firmly rejects the scientific evidence that climate change is human-caused, opposing the only action (a reduction of fossil fuel burning) that can save us from ever-more dangerous climate change impacts. A cartoon drawn exclusively for the Madhouse Effect captures the Trump worldview:
History will judge us by what we chose to do at the crucial moment in time. A group of scientists, including myself, have consequently decided that we must speak out about the irreparable harm that would be done by a climate change-denying, anti-science-driven Trump presidency. We have encouraged other members of the scientific community to join us:
It would nevertheless be a mistake to consider the problem to be limited to the Republican standard-bearer. It penetrates far more deeply. Whether to even accept the overwhelming evidence that climate change is real and human-caused has become a partisan political issue, thanks in large parts to the efforts of bad actors like the Koch Brothers to poison both our atmosphere and our public discourse. In the toxic environment that exists in today's Republican party, even the most conservative Republican incumbents are subjected to well-funded primary challenges if they choose to admit that climate change is real and an issue we must contend with.
The one thing that every American voter can do to try to change that is to (a) vote in the upcoming election, and (b) vote CLIMATE, not just at the top of the ticket, but all the way down.
The future of this planet could quite literally lie in the balance.
Earlier this month, my co-author Tom Toles (the Pulitzer-winning editorial cartoonist for The Washington Post) and I published our new book, The Madhouse Effect: How Climate Change Denial Is Threatening Our Planet, Destroying Our Politics, and Driving Us Crazy.
Tom and I had a commentary excerpting parts of the book in Sunday's The Washington Post. In addition to calling out the most prominent current climate change denier of them all—Donald Trump, we profiled eight other leading climate change deniers in the world of politics, individuals whom—as the commentary notes—have been responsible for "clouding the climate change debate" and stalling action by participating in "a campaign of deliberate misinformation."
The Washington Post
Among the rogues gallery of leading climate change deniers are (from left to right, top to bottom): Congressman Joe Barton (R-TX), fossil fuel shill Steve Milloy, media mogul Rupert Murdoch, self-styled "Skeptical Environmentalist" Bjorn Lomborg, scientist-turned-denier-for-hire Fred Singer, the inimitable Sarah Palin, conservative funders Charles and David Koch (aka the Koch Brothers), and "swift-boat" architect Marc Morano.
Among other notable honorable mentions is U.S. Sen. James Inhofe (R-Okla.). Though Inhofe didn't make the rogues gallery above, he gets the attention he deserves in book.
From Chapter 6 of the book, "Hypocrisy, They Name is Climate Change Denial":
Consider Republican Senator James Inhofe of Oklahoma, a recipient of extensive funding over the years from the fossil fuel interests including ExxonMobil and the Koch Brothers. He is perhaps best known for declaring that climate change is the "greatest hoax ever perpetrated on the American people" and for introducing a snowball on the U.S. Senate floor as ostensible proof against global warming.
And Inhofe, of course, gets the full TTT (Tom Toles Treatment):
When it comes to hypocrisy and irony, Inhofe is truly king. Under the heading of "you can't make this stuff up," there is, for example, this particular episode that we recount in the book:
Back in July 2011, Inhofe was selected as keynote speaker at the Heartland Institute's annual global warming denier "conference." He had to cancel out at the last minute however. He had grown ill swimming in a lake back in his home state of Oklahoma. The lake was suffering from an algal bloom as a result of the unprecedented heat and drought that Oklahoma experienced that summer—an event that scientists have determined was tied to climate change.
Though he quipped afterward, "the environment strikes back," he was obviously undeterred in his climate change-denying ways, remaining one of the most prominent advocates for fossil fuel interests in the U.S. Senate.
Which, finally, brings us to Inhofe's hometown newspaper, The Oklahoman, named the "Worst Newspaper in America," by the Columbia Journalism Review (CJR) for "conformance to the right-wing political views" of the paper's owners and its "alleged racist hiring practices" among other things.
The Oklahoman has an unusually atrocious record on all things environment. As CJR notes:
Where else can you find a big-city editorial page—run by a Christian Coalition devotee plucked from Washington D.C.'s right-wing Free Congress Foundation—that not only demonizes ... environmentalists ...
And it hardly comes as a surprise that The Oklahoman, like Inhofe, is a major promoter of climate change denialism, acting as thinly veiled advocates for the fossil fuel lobby that dominates their state rather than a conduit of objective news for their readers.
So how low could they go, you might ask? This is how low.
Stan Glantz has been called the "Ralph Nader of the anti-tobacco movement." He has led the effort to expose how tobacco interests hid the detrimental effects of their product on human health from the public and has advocated staunchly for policies to reduce smoking.
Glantz has explicitly likened the fossil fuel industry's campaign to deny the science of human-caused climate change to the earlier campaign by the tobacco industry to deny the adverse health impacts of their product. Same modus operandi, even some of the same paid deniers-for-hire, like Fred Singer listed in the rogues gallery above.
Just last week, Glantz published a new high-profile study in the Journal of the American Medical Association (JAMA) exposing how yet another industry tried to hide the adverse health impacts of their product. Glantz and colleagues found internal documents revealing that the junk food industry paid scientists to "play down the link between sugar and heart disease and promote saturated fat as the culprit instead."
#Sugar Industry Paid Harvard Scientists to Shift Blame to Fat https://t.co/MjBEsyE0z3 @UCSUSA @ewg @markhymanmd @Healthy_Child @foodandwater— EcoWatch (@EcoWatch)1473880629.0
So, how does The Oklahoman cover this development? You guessed it: by turning the entire matter on its head, attempting to use it as an opportunity to blame the government rather than the powerful corporate interests who were exposed by Glantz's research. And, for good measure, they attempt to use the episode to attack the science of climate change!
Indeed, they attack me specifically, resurrecting untruthful climate change denier talking points about the the discredited 'climategate' affair, and the widely debunked attacks on the famous "hockey stick" curve my co-authors and I published in the late 1990s (if you want to learn the truth behind all of this, consider reading my previous book The Hockey Stick and the Climate Wars).
It is possible that such a twisted viewpoint, wherein an obvious example of industry malfeasance is used to attack the scientific community, including climate scientists specifically, could arise purely from profound ignorance, rather than cynicism and malice. Yes, anything is possible.
But in the end, we see that Hypocrisy: Thy Name is Truly Climate Change Denial. Thy Nickname might just be The Oklahoman.
Michael Mann is Distinguished Professor of Atmospheric Science at Pennsylvania State University and author of The Hockey Stick and the Climate Wars, Dire Predictions: Understanding Climate Change, and just out in September, The Madhouse Effect, with The Washington Post editorial cartoonist Tom Toles.
Several weeks ago, on June 17, I provided testimony about the threat of human-caused climate change to the Democratic Party Platform drafting committee in Phoenix, Arizona. Fittingly, my testimony was just one day before record heat struck Phoenix.
At the beginning of my testimony, I made the point, using slightly lofty language appropriate for the occasion, that the impacts of climate change are now so profound that we no longer need sophisticated signal-detection machinery to see them:
I am a climate scientist and have spent much of my career with my head buried in climate model output and observational climate data, trying to tease out the signal of human-caused climate change.
What is disconcerting to me and so many of my colleagues is that these tools that we've spent years developing increasingly are unnecessary because we can see the impacts of climate change playing out in real time on our television screens in the 24 hour news cycle.
Regardless of how you measure the impacts of climate change—whether it be food, water, health, national security, our economy—climate change is already taking a great toll. And we see that tool in the damage done by more extreme floods, like the floods we've seen over the past year in Texas and in South Carolina. We see it in the devastating combination of sea level rise and more destructive hurricanes which has led to calamities like "Superstorm" Sandy and what is now the perennial flooding of Miami beach. We see it in the unprecedented drought, like that which continues to afflict California, a doubling in the area of wildfire, fire burning in the western U.S. and indeed, in the record heat we may see this weekend in phoenix.
The signal of climate change is no longer subtle. It is obvious.
My point—that we don't need sophisticated techniques to identify the human fingerprint present in e.g. the doubling of extreme heat or the tripling (in fact) of western wildfire that we have seen in the U.S. in recent decades, ought to be clear to any honest observer.
It would be absurd to conclude that I was arguing that climate models and climate data are no longer necessary in climate science, especially given that they continue to form the bread and butter of my own scientific research (I've published over a dozen scientific articles using climate models and climate data during the past year alone).
So you can imagine my shock—yes, shock—that climate change deniers and conservative media outlets that serve as mouthpieces for them, would seek to convince their readers of just that.
It is an instructive ontological exercise to follow this particular affair—from its inception through the latest developments, sort of like observing a deviant version of the game "telephone" (or "Chinese whispers" for British readers) wherein the participants are actually trying to distort the message as it is passed along from one person to the next.
Milloy, who actually calls himself the "junk man" with no apparent sense of irony, is a denier-for-hire who happily takes money from tobacco interests, chemical interests and of course fossil fuel interests to do their dirty work, attacking seemingly any scientist whose findings threaten their financial bottom line.
Milloy frequently publishes columns in the notorious Washington Times. Which brings us to the next stage of the affair ...
Later that same day, the Washington Times—a paper founded by Rev. Sun Myung Moon of the Unification Church, ran a piece by one Valerie Richardson entitled Michael Mann, scientist: Data 'increasingly unnecessary' because 'we can see climate change.'
Somehow "tools" have become "data." It almost seems like they're going out of their way to misrepresent my statements, doesn't it?
Almost as if to demonstrate that they too have absolutely no sense of irony, the Washington Times referred to me in the piece as a "Leading climate doomsayer" (the Unification Church, you see, is often considered a doomsday cult). The Washington Times also happens to be closely tied to ALEC—a Koch Brothers-funded organization that promotes climate change denialism and subverts efforts to incentivize renewable energy.
Understand that we have now gone all the way from what I actually said (that climate change impacts have become so profound now that we often don't need fancy techniques to see them) to something so patently absurd I couldn't possibly have said it (that we don't need data to measure global warming).
Witness now, after a two week hiatus, the hand-off from the Koch Brothers to the Scaife Foundations, the Pittsburgh Tribune-Review, to be specific, which was founded by the now-deceased Richard Mellon Scaife. On July 13, the Tribune-Review perpetuated the smear with a climate change-denying editorial containing the farcical howler "[Mann] says facts no longer are necessary to substantiate the climate change story line." Just when you thought the distortion couldn't get more egregious ...
One day later, on July 14, the execrable Tribune op-ed was republished on the right wing website GOPUSA, a website connected to—you guessed it—Richard Mellon Scaife (though a bit of detective work is required to connect the dots).
Oil baron Richard Mellon Scaife and his empire were behind what Hillary Clinton famously referred to as the "vast right-wing conspiracy" to take down her husband, President Bill Clinton (for the record, she was correct).
Certainly, you're thinking, it must be a coincidence that nearly every player in this latest episode seems to be tied in some way to either the Koch Brothers or Scaife Foundations.
Or maybe not so much ...
Richard Mellon Scaife and the Scaife Family Foundations are, along with the Koch Brothers, the greatest private funders of climate change denialism, having stepped up their funding in recent years as fossil fuel corporations like ExxonMobil have come under increased scrutiny for their funding of climate change denial.
As I discuss in my book The Hockey Stick and the Climate Wars about the attacks against me by climate change deniers looking to discredit the iconic "Hockey Stick" graph my co-authors and I published in the late 1990s (p. 64):
Wealthy privately held corporations and foundations with close interests in, or ties to, the fossil fuel industry, such as Koch Industries and the Scaife Foundations, have become increasingly active funders of the climate change denial campaign in recent years. Unlike publicly traded companies such as ExxonMobil, these private outfits can hide their finances from public view, and they remain largely invulnerable to outside pressure. In recent years, as ExxonMobil has been pressured by politicians on both sides of the aisle to withdraw from funding the climate change denial movement, Koch and Scaife have stepped up, contributing millions of dollars to the effort.
Koch funding played a major role in the faux scandal known as "climategate" which involved the misrepresentation of scientists based on out-of-context quotes (sound familiar?) taken from emails of theirs that had been stolen off a university computer server in the UK (p. 220):
One report showed that twenty or so organizations funded at least in part by Koch Industries had "repeatedly rebroadcast, referenced and appeared as media spokespeople" in stories about climategate.
Meanwhile, the Scaifes funded many of the personal attacks intended to discredit me and the "Hockey Stick" (p. 228):
In mid-January 2010, a group known as the National Center for Public Policy Research (NCPPR), which receives funding from the Scaife Foundations, led a campaign to have my NSF grants revoked. The perverse premise was that I was somehow pocketing millions of dollars of "Obama" stimulus money simply because I was a coinvestigator on several recently funded NSF grants. These absurd distortions were--no surprise--promoted by Glenn Beck, Rush Limbaugh, and others of similar persuasion.
and (p. 229):
Two Scaife-funded groups.. the Southeastern Legal Foundation and the Landmark Legal Foundation, had swung into action. The latter had already sued the University of Massachusetts and University of Arizona to obtain copies of my personal e-mails with my two hockey stick coauthors, while in May 2010 the former demanded extensive information from the NSF regarding grants that had been made to me as well as to several of my colleagues at Penn State, the University of Chicago, the University of Washington, the University of Arizona, and Columbia University.
It began to strike me as curious that so many of the demands that I be investigated could be traced back to organizations with ties to the Scaife Foundations. The Commonwealth Foundation, a Pennsylvania organization that is the recipient of considerable Scaife largess, for example, had been pressuring Penn State University to fire me since climategate broke in late November 2009. It managed to get the sympathetic Republican chair of the Pennsylvania state senate education committee to threaten to hold Penn State's funding hostage until "appropriate action is taken by the university against associate [sic] professor Michael Mann." Indeed, it was the Commonwealth Foundation attacks that essentially forced Penn State to launch its initial inquiry into the various allegations against me in December 2009 (similar inquiries and investigations of CRU scientists were initiated in the United Kingdom). The Commonwealth Foundation kept the pressure on for months through a barrage of press conferences and press releases attacking me personally and criticizing Penn State for its supposed "whitewash" treatment of any number of supposed offenses. It also ran daily attack ads against me in our university newspaper The Collegian for an entire week in January and helped organize a protest rally against me on campus. It is likely that these attacks forced Penn State's hand yet again, leading it, following the completion of the initial inquiry in February 2010, to move to a formal investigation, despite having found no evidence of misconduct in the initial inquiry phase.
What is the take-home message here?
As we head into the 2016 presidential election, it is clear that polluting interests and other bad actors are mobilized. They are doing their best to continue the attacks on science and scientists whose findings threaten their bottom line, to distract the public, to promote climate change denial propaganda and to support politicians who will support their agenda of denial and inaction.
The best defense is to study the positions of the candidates and make sure that climate action is at the top of your agenda when you go to the voting booth this fall.
Fossil fuel companies have been misleading the public and policymakers about the risks of their products for decades. These corporations should obviously be held accountable.
It's odd that we aren't able to discuss this straightforwardly. After all, accountability is common for other industries. When companies mislead the public about the health effects of the drugs they market, for instance, we hold them accountable.
Similarly, when asbestos manufacturers misled the public about the cancers their product caused, they were held accountable. When Enron misled its customers and shareholders, it was held accountable. And when we learned that Volkswagen cheated consumers by secretly embedding an emissions control "kill switch" in it's diesel vehicles, citizens and government officials swung into action to hold the company accountable.
Most significantly, when we discovered that the tobacco industry hid information about the addictive nature and deadly toll of cigarettes and systematically engaged in a decades-long campaign to misinform the public, we held the industry accountable.
As early as the late 1970s, executives at fossil fuel companies were well aware that burning oil, gas and coal could cause irreversible and dangerous climate change. Indeed, as early as 1981, ExxonMobil was weighing whether or not to develop carbon-intense gas reserves off the coast of Indonesia because of the climate risks associated with the project.
ExxonMobil and other fossil fuel companies chose, however, to suppress what its own scientists knew. From 1979 to 1983, the American Petroleum Institute operated a scientific task force to study climate change. According to a researcher who worked on the project, it was taken out of scientists' hands and quickly buried—and forgotten—until reporters rediscovered it just last year.
Public agencies and university scientists were also tracking climate change around this same, of course, and the first high-profile climate hearings in the U.S. Congress occurred around 1988. That's when fossil fuel industry lobbyists and executives started pouring more money into front groups and advocacy campaigns aimed at spreading doubt about climate science and blocking action to reduce emissions.
Leonard Bernstein, an ExxonMobil scientist who advised one of the industry's public policy groups in the mid-1990s attempted to set the companies straight on climate science. He was rebuffed.
Despite executives' claims to the contrary, many oil and coal companies continue to support groups like the American Legislative Exchange Council (ALEC), which spreads misinformation about climate science to state legislators, but denies that it denies climate science. And in the past few months, we've learned that now-bankrupt coal giant Alpha Natural Resources was funding a lawyer who has carved out a niche for harassing climate scientists.
Consider in this regard the deeply deceptive recent WSJ op-ed by David B. Rivkin Jr., who writes for the National Review and is a principal attorney in the fossil fuel industry attacks on the Environmental Protection Agency clean power plan, and Andrew M. Grossman, who represents the Competitive Enterprise Institute (CEI), an organization with long-established ties to both the fossil fuel industry and the tobacco industry before it, including its ongoing affiliation with Chris Horner, the very lawyer Alpha was funding to attack climate scientists.
The main defense Rivkin and Grossman muster in the face of calls to hold companies accountable for funding deceptive campaigns about their products is that under the First Amendment, the government cannot prevent them or the groups they work with from speaking out.
No doubt. But when state and U.S. prosecutors successfully sued the tobacco companies for systematically misleading the public about the risks their products caused, no one's free speech rights were infringed. Instead, tobacco companies agreed to pay states for health care costs associated with their products, just as Volkswagen will have to pay its customers and other people who suffered from its deceptions.
The fossil fuel industry can and should be held accountable in the same way. And indeed, thousands of Americans are calling on state attorneys general and the Department of Justice to act.
Rivkin and Grossman also peddle falsehoods about me specifically. For example, they launder a popular myth in climate change denier circles that the famous "Hockey Stick" curve which my co-authors and I published sixteen years ago is "an artifact of [our] statistical methods." The claim is flatly untrue.
Our key finding, that the recent warming trend is unprecedented over at least the past 1,000 years, has not only been overwhelmingly affirmed by more than a dozen subsequent studies, but has been vastly strengthened. There is now widespread consensus in the scientific community that recent warmth is unprecedented over an even longer time frame (for the full story behind fossil fuel industry-funded attacks on me and the hockey stick, read my book The Hockey Stick and the Climate Wars).
Perhaps more to the point, Rivkin and Grossman completely mislead readers about why CEI and the National Review are being sued by me. The lawsuit is not about their political stances or even their feelings or beliefs about climate policy or climate science. It focuses instead on their clients false, defamatory and libelous accusations that my work is fraudulent.
Indeed, given their affiliations with groups that have regularly attacked climate scientists, it's quite galling to see Rivkin and Grossman compare themselves to Galileo Galilei, the famous Italian scientist who bravely insisted that the Earth orbited the Sun and not the other way around. Such ironic attempts by climate change deniers, anti-vaxxers and other science critics to usurp the mantle of legitimate scientific skepticism is so commonplace it has a name—the Galileo Gambit.
So let's be clear about the facts: Galileo had the courage to speak truth to the powerful interests of his day in the Roman Catholic Church, just as two generations of scientists have tried to speak truth about climate change to executives and lobbyists in the fossil fuel industry.
The Catholic Church declared Galileo a heretic and placed him under house arrest. Oil industry lobbyists don't have that kind of power, thankfully, so they merely suppressed internal climate research and started funding groups like CEI to publicly attack independent climate researchers, instead.
If he were alive today, Galileo would be appalled to witness industry shills attempt to wrap themselves in his legacy. He would not be on the side of powerful fossil fuel interests who fund attacks on scientific research; perhaps this time, ironically, he would be on the side of his Pope and the scientists whose council he regularly seeks, who respect facts and evidence and recognize the reality we live in for what it is.
Michael Mann is Distinguished Professor of Atmospheric Science at Pennsylvania State University and author of The Hockey Stick and the Climate Wars: Dispatches from the Front Lines and the recently updated and expanded Dire Predictions: Understanding Climate Change.
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In the wake of the COP 21 UN climate summit in Paris, a number of important questions still remain unanswered. Take for example the commitment reached by the 197 participating nations to limit warming below the "dangerous" level of 2C relative to pre-industrial time (neglecting for the time being the aspirational goal of a substantially lower 1.5C limit acknowledged in recognition of the danger posed to low-lying island nations). The question immediately arises: How much time do we have until we reach the danger zone? How close are we to the 2C warming limit?
It has been widely reported that 2015 will be the first year where temperatures climbed to 1C above the pre-industrial. That might make it seem like we've got quite a ways to go until we breach the 2C limit. But the claim is wrong. We exceeded 1C warming more than a decade ago. The problem is that here, and elsewhere, an inappropriate baseline has been invoked for defining the "pre-industrial." The warming was measured relative to the average over the latter half of the 19th century (1850-1900). In other words, the base year implicitly used to define "pre-industrial" conditions is 1875, the mid-point of that interval. Yet the industrial revolution and the rise in atmospheric CO2 concentrations associated with it, began more than a century earlier.
Unfortunately, even the Intergovernmental Panel on Climate Change (IPCC) has fallen victim to this problematic convention in their latest (5th) assessment report. The key graphic (Fig. 1 below) in the Summary for Policy Makers ("SPM") of the report measures net anthropogenic (i.e. human-generated) carbon emissions and the resulting warming that can be expected. Both the emissions and warming and measured relative to an 1870 baseline.
The various future emissions scenarios are called "RCP"s (for "Representative Concentration Pathways") and they reflect varying assumptions regarding our future efforts to limit carbon emissions. The "RCP 2.6" scenario (dark blue), the most aggressive of the scenarios (from the standpoint of ramping down carbon emissions), corresponds to limiting net carbon emissions to about 3000 Gigatons (3 trillion tons) of CO2. We've already burned through about 2,000 Gigatons, i.e. we have expended two thirds of our apparent "carbon budget."
Achieving those limits in emissions would in turn limit maximum atmospheric CO2 concentrations to just under 450 parts per million ("ppm"). Pre-industrial levels were about 280 ppm. Current levels are just above 400 ppm and increasing by about 2.1 ppm per year. At that rate, we'll reach 450 ppm in a little over two decades. So obviously we need to reduce our carbon emissions rather rapidly if we are to avoid crossing the 450 ppm threshold.
The IPCC graphic suggests that keeping net CO2 emissions below 3 trillion tons—and thereby stabilizing maximum CO2 concentrations below 450 ppm—would likely keep warming below the "dangerous" 2C limit. Unfortunately, that conclusion is overly optimistic because, once again, it relies on the use of an artificially warm, too-recent baseline for defining the pre-industrial period.
To better understand the problem, consider this graph (Fig. 2 below) from an article my colleagues and I published in the American Meteorological Society's Journal of Climate back in 2013.
Source: Schurer et al (2013)
The graph shows the warming of the Northern Hemisphere (in degrees C) due to human-generated greenhouse gases ("GHG") alone, as estimated by the various climate models used in the IPCC 5th assessment report (the black curve—the "multimodel mean" is the average over all of the climate model simulations that were done). The graph has been annotated to indicate the warming observed by 1800 and 1900. It is evident that roughly 0.3C greenhouse warming had already taken place by 1900, and roughly 0.2C warming by 1870. While that might seem like a minor amount of warming, it has significant implications for the challenge we face in stabilizing warming below 2C, let alone 1.5C, as we shall see below.
Thanks to a months-long investigation by the Pulitzer-prize winning InsideClimate News, we learned last week that ExxonMobil's own scientists had secretly confirmed the science behind human-caused climate change as early as the late 1970s.
Yes—this is the same ExxonMobil that has funded efforts to attack the science of climate change for more than two decades. As I recount in The Hockey Stick and the Climate Wars, I found myself at the center of those attacks because of the iconic Hockey Stick graph my co-authors and I published back in the late 1990s. The graph highlighted, in an easily understandable way, the unprecedented nature of modern global warming. As a result, it proved greatly inconvenient for vested interests, like ExxonMobil, who are opposed to regulation of carbon emissions—from the burning of fossil fuels—that are behind the warming of the globe and the associated changes in climate.
The parallels with the tobacco industry, which knew about—and hid from the public—the health dangers of cigarette smoking, are staggering. Indeed, the industry-funded climate change denial campaign, as I discuss in The Hockey Stick and the Climate Wars, has its roots in the earlier tobacco industry disinformation campaign.
In their blockbuster new article, InsideClimate News details how key senior Exxon scientists had warned top executives about the reality and threat of continued fossil fuel burning and the associated warming of the planet and changes in climate "well before most of the world had heard of the looming climate crisis." They describe a rather prescient presentation made by one of Exxon's senior scientists as far back as July 1977:
At a meeting in Exxon Corporation's headquarters, a senior company scientist named James F. Black addressed an audience of powerful oilmen. Speaking without a text as he flipped through detailed slides, Black delivered a sobering message: carbon dioxide from the world's use of fossil fuels would warm the planet and could eventually endanger humanity.
"In the first place, there is general scientific agreement that the most likely manner in which mankind is influencing the global climate is through carbon dioxide release from the burning of fossil fuels," Black told Exxon's Management Committee, according to a written version he recorded later.
ExxonMobil, we learn from InsideClimate News, chose as a result to fund an internal research effort over the next few years to assess the threat posed by climate change:
Exxon budgeted more than $1 million over three years for the tanker project to measure how quickly the oceans were taking in CO2. It was a small fraction of Exxon Research's annual $300 million budget, but the question the scientists tackled was one of the biggest uncertainties in climate science: how quickly could the deep oceans absorb atmospheric CO2? If Exxon could pinpoint the answer, it would know how long it had before CO2 accumulation in the atmosphere could force a transition away from fossil fuels.
They even worked closely with outside climate researchers, ultimately reaching the conclusion that the potential threat was indeed great (emphasis added):
Exxon also hired scientists and mathematicians to develop better climate models and publish research results in peer-reviewed journals. By 1982, the company's own scientists, collaborating with outside researchers, created rigorous climate models—computer programs that simulate the workings of the climate to assess the impact of emissions on global temperatures. They confirmed an emerging scientific consensus that warming could be even worse than Black had warned five years earlier.
ExxonMobil executives were informed in no uncertain terms, by their own science division, that climate change impacts could be "catastrophic" and potentially "irreversible" unless there were major reductions in fossil fuel burning:
Exxon's research laid the groundwork for a 1982 corporate primer on carbon dioxide and climate change prepared by its environmental affairs office. Marked "not to be distributed externally," it contained information that "has been given wide circulation to Exxon management." In it, the company recognized, despite the many lingering unknowns, that heading off global warming "would require major reductions in fossil fuel combustion."
Unless that happened, "there are some potentially catastrophic events that must be considered," the primer said, citing independent experts. "Once the effects are measurable, they might not be reversible."
ExxonMobil scientists, furthermore, recognized that the company had an ethical obligation to come forward with what they had learned. Staff scientist Roger Cohen stated as much in a September 1982 memo described by InsideClimate News:
He warned that publication of the company's conclusions might attract media attention because of the "connection between Exxon's major business and the role of fossil fuel combustion in contributing to the increase of atmospheric CO2."
Nevertheless, he recommended publication.
Our "ethical responsibility is to permit the publication of our research in the scientific literature," Cohen wrote. "Indeed, to do otherwise would be a breach of Exxon's public position and ethical credo on honesty and integrity."
A good faith effort on their part to acknowledge and communicate the scientific basis and the risks involved would, their own researchers argued, grant them legitimacy when it comes to the honest debate that is to be had about policy prescriptions for dealing with the climate change problem. According to InsideClimate News:
In the early 1980s Exxon researchers often repeated that unbiased science would give it legitimacy in helping shape climate-related laws that would affect its profitability.
So let's be clear. ExxonMobil chief executives could have heeded that advice. They could have gone down in history as heroes who helped save the planet from the ravages of climate change.
But that was not to be.
InsideClimate News quotes me at the end of the article:
Michael Mann, director of the Earth System Science Center at Pennsylvania State University, who has been a frequent target of climate deniers, said that inaction, just like actions, have consequences. When he recently spoke to InsideClimate News, he was unaware of this chapter in Exxon's history.
"All it would've taken is for one prominent fossil fuel CEO to know this was about more than just shareholder profits, and a question about our legacy," he said. "But now because of the cost of inaction—what I call the 'procrastination penalty'—we face a far more uphill battle."
Economic pressures, InsideClimate News notes, led Exxon to dissolve their climate research division by the late 1980s. In his famous July 1988 congressional testimony, NASA scientist James Hansen had meanwhile announced to the world that human-caused climate change had arrived, and that the cause was the burning of fossil fuels. ExxonMobil had to make a decision: would they choose to be part of the solution, or part of the problem? InsideClimate News lays out the answer for us:
Exxon helped to found and lead the Global Climate Coalition, an alliance of some of the world's largest companies seeking to halt government efforts to curb fossil fuel emissions. Exxon used the American Petroleum Institute, right-wing think tanks, campaign contributions and its own lobbying to push a narrative that climate science was too uncertain to necessitate cuts in fossil fuel emissions.
Perhaps nothing better conveys the dramatic shift in ExxonMobil's attitude toward climate change than the subsequent activities of the aforementioned staff scientist Roger Cohen, who had once warned of the potentially "catastrophic" future impacts of climate change and had expressed concern about the implications for Exxon's "honesty and integrity" were it not to come forward with it's knowledge that human-caused climate change is real and a threat. You see, Cohen went on to work for industry front groups like the George C. Marshall Institute that advocate for fossil fuel interests like Exxon by denying the reality and threat of climate change. Austin is one of a small fringe group of scientists who sought to sabotage the American Physical Society's position statement affirming the science of human-caused climate change. One is reminded of the famous Upton Sinclair quote "It is difficult to get a man to understand something, when his salary depends on his not understanding it."
One might think that the latest revelations about ExxonMobil and their tobaccoesque decades-long effort to hide the findings of their own scientists, would end climate change denialism for good. If you're a hardcore climate change denier, after all, it must be rather demoralizing to learn that ExxonMobil's own scientists expressed contempt for your views behind your back. If you've lost ExxonMobil's own scientists, you've lost the scientific debate.
But let's remember that climate change denial isn't actually about the science. That was settled long ago—including by Exxon's own scientists no less. Climate change denial is about opposition to regulation. It is about science-denying front groups, industry shills, bought-and-sold politicians, and other bad faith actors who continue to provide cover for corporate polluters like ExxonMobil by fooling the public.
By any reasonable measure, just about every conceivable climate change denier talking point had been shot down by 2007 (and arguably much earlier). As I explained in chapter 12 ("Heads of the Hydra") of The Hockey Stick and the Climate Wars:
The complete or near collapse by 2007 of the pillars of defensible climate change skepticism represented a critical juncture in the debate over the science. Would climate change contrarians throw in the towel and at least concede the reality of human-caused climate change? Would they engage constructively in the discourse, focusing their efforts on the legitimate remaining uncertainties, such as the uncertain nature of climate change projections and the worthy debate to be had regarding what to do about the problem? Or would they retrench and continue to contest the ever-accumulating evidence supporting the reality of the climate change problem? The question is of course rhetorical; we already know the answer.
As we know, of course, the climate change disinformation campaign simply ratcheted the denial machine up a notch. Attack dogs doubled down in their campaign of denial and deceit, and so we soon got the ironically-termed "climategate" campaign, wherein climate scientists emails were stolen, combed through, cherry-picked, and misrepresented through out of context quotations in an effort to call the scientific evidence for climate change into question on the eve of the December 2009 Copenhagen climate summit (read chapter 14, "Climategate: The Real Story" of The Hockey Stick and the Climate Wars for further details).
The irony, of course, is that rather than uncovering any wrongdoing or indiscretion by climate scientists, the "climategate" affair simply revealed that climate change deniers were now more than willing to engage in criminal behavior in their efforts to misrepresent the science and scientists and deceive the public. Like Watergate before it, the real scandal was the criminal theft, not the content of the stolen materials—a fact that was oddly lost on many media organizations who readily bought into the denialist framing of the matter. As I note in the epilogue of The Hockey Stick and the Climate Wars:
While the campaign did have the immediate impact of casting doubt over climate science, it also marked a critical juncture, and indeed potentially a turning point, in the climate change debate. Perhaps "climategate" was the moment when the climate change denial movement conceded the legitimate debate, choosing instead to double down on smear and disinformation, a tacit acceptance that an honest, science-based case for denying the reality of human-caused climate change and the threat it presents could no longer be made. Maybe it was the moment when the seamy underbelly of the climate change denial movement became exposed for all to see.
So one might well wonder as we head toward the critical December 2015 climate summit in Paris, have the latest revelations about ExxonMobil caused climate change deniers to see the light, to reconsider their position? And one might well suspect the answer.
Since the ExxonMobil story broke, the "merchants of doubt" have instead engaged in a campaign of misdirection, presumably hoping they can distract the public and policymakers from the stunning new revelations. Among other things, we have seen these events unfold in the few days since the story broke:
- The right-wing Canadian newspaper National Post engaged in a reprehensible personal attack against climate advocate Naomi Klein and her opposition to mining the Canadian tar sands (something James Hansen has warned would be "game over for the climate"). The piece included a false and libelous allegation of "fraud" against yours truly. It is worth noting that the National Post has previously lost a defamation suit brought by a climate scientist. It is also worth noting that the columnist who penned the piece, Conrad Black, is best known for having served a prison term for actually committing fraud. Chalk one up for chutzpah.
- Conservative commentator George Will, known for his serial distortions when it comes to the matter of climate change, has attacked Pope Francis for his efforts to raise awareness about the threat of climate change. Though Will's commentary is filled with half-truths, falsehoods and innuendo, what is most cynical and pernicious about the piece is the pretense of concern that acting on climate change "would devastate the poor" when precisely the opposite is known to be true.
- Professional climate smearmonger Marc Morano joined with Koch Brothers-funded attack dog John Hinderaker and others in the conservative media and blogosphere accusing climate scientists of wanting to "arrest climate skeptics". As with just about anything that comes out of the climate denialosphere, the allegation is of course completely untruthful. The reality is that a small group of climate scientists recently suggested that the department of justice investigate the possibility that certain fossil fuel companies (not individuals) might be subject to civil Racketeer Influenced and Corrupt Organizations ("RICO") charges. Civil RICO seeks the payment of fines (not imprisonment of any individuals) by corporate entities that knowingly hid the damages done by their product. That is precisely what happened with big tobacco, and the same Department of Justice lawyer who successfully brought a civil RICO suit against tobacco companies more than a decade ago has recently argued that Exxon and other fossil fuel companies might suffer similar liability given the latest revelations over what they knew about the dangers of climate change, and when they knew it.
As the curtain continues to be lifted on the climate change denial machine and its deceitful tactics, we must assume that the smears and distortions will simply grow more desperate, the misdirection and distraction more brazen. Expect the worst as the 2015 Paris climate summit—potentially the last opportunity to reach an international agreement that will stave off dangerous and irreversible changes in climate—approaches. Bad faith actors have shown they will do anything they can—including engaging in criminal actions—in their efforts to sabotage global agreements aimed at limiting carbon emissions.
Let's not allow their cynical efforts to be successful. Call out climate change disinformation when you encounter it, and do what you can to correct the record. Explain to your family, friends, coworkers and classmates the importance of stabilizing greenhouse gas concentrations below dangerous levels. And most of all, keep your eye on the prize—a binding international treaty to reduce carbon emissions later this year in Paris.
Michael Mann is Distinguished Professor of Meteorology at Pennsylvania State University and author of The Hockey Stick and the Climate Wars: Dispatches from the Front Lines and the recently updated and expanded Dire Predictions: Understanding Climate Change.
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One of the most under-appreciated aspects of the climate change problem is the so-called "fat tail" of risk. In short, the likelihood of very large impacts is greater than we would expect under typical statistical assumptions.
We are used to thinking about likelihoods and probabilities in terms of the familiar "normal" distribution—otherwise known as the "bell curve." It looks like this:
Image credit: MIT News
Roughly 68 percent of the area falls within the region bounded by 1 standard deviation below (-1 sigma) and above (+1 sigma) the "mean" or "average," and a substantially greater 96 percent of the area falls between two standard deviations below (-2 sigma) and above (+2 sigma) the mean. So given this statistical distribution, we would expect values to fall above the +2 sigma (two standard deviation) limit only about 2 percent of the time. Call that the positive "tail" of the distribution.
There are many phenomena that follow a normal distribution, from the heights of adult men in the U.S. to the day-to-day fluctuations in summer temperature in New York City. But the predicted warming due to increased greenhouse gas concentrations isn't one of them.
Global warming instead displays what we call a "heavy-tailed" or "fat-tailed" distribution. There is more area under the far right extreme of the curve than we would expect for a normal distribution, a greater likelihood of warming that is well in excess of the average amount of warming predicted by climate models.
An important new book, Climate Shock: The Economic Consequences of a Hotter Planet, by Environmental Defense Fund senior economist Gernot Wagner and Harvard economist Martin Weitzman, explores the deep implications this has for the debate over climate policy.
Here's the blurb I wrote for the book (a shortened version of which appears on the back cover):
Think climate change is a low-priority problem? Something to put off while we deal with more immediate threats? Then Climate Shock will open your eyes. Leading economists Wagner and Weitzman explain, in simple, understandable terms, why we face an existential threat in human-caused climate change. The authors lay out the case for taking out a planetary insurance policy, without delay, in the form of market mechanisms aimed at keeping carbon emissions below dangerous levels. —Michael E. Mann, author of The Hockey Stick and the Climate Wars
The "insurance policy" analogy is appropriate here. We don't purchase fire insurance on our homes because our homes are likely to burn down. Far from it in fact: less than one-in-four homeowners are likely to ever experience a house fire. We purchase fire insurance because we understand that, even though such a catastrophic event is unlikely (less than 25 percent chance of happening), if it did happen, it would be catastrophic. So it is worth hedging against, by investing money now—in the form of fire insurance.
Let us consider, in that context, the prospects for warming well in excess of what we might term "dangerous" (typically considered to be at least 2C or 3.6F warming of the planet). How likely, for example, are we to experience a catastrophic 6C = 11F warming of the globe, if we allow greenhouse gas concentrations to reach double their pre-industrial levels (something we're on course to do by the middle of this century given business-as-usual burning of fossil fuels)?
Well, the mean or average warming that is predicted by models in that scenario is about 3C, and the standard deviation about 1.5C. So the positive tail, defined as the +2 sigma limit, is about 6C of warming. As shown by Wagner & Weitzman (see figure below), the likelihood of exceeding that amount of warming isn't 2 percent as we would expect for a bell-curve distribution. It's closer to 10 percent!
In fact, it's actually even worse than that when we consider the associated risk.
Risk is defined as the product of the likelihood and consequence of an outcome. We just saw that the likelihood of warming is described by a heavy-tailed distribution, with a higher likelihood of far-greater-than-average amounts of warming than we would expect given typical statistical assumptions. This is further compounded by the fact that the damages caused by climate change—i.e. the consequence—also increases dramatically with warming. That further increases the associated risk.
With additional warming comes the increased likelihood that we exceed certain "tipping points," like the melting of large parts of the Greenland and Antarctic ice sheet and the associated massive rise in sea level that would produce. Recent research suggests we may now have warmed the planet enough to insure at least 10 feet of sea level rise if not more. Some models suggest that that will take multiple centuries to happen. But maybe it will happen faster than the models predict.
Indeed, we have historically tended to underestimate the rate of climate change impacts. We reviewed the evidence in Dire Predictions: Understanding Climate Change, showing that many aspects of climate change—e.g. the melting of Arctic sea ice and the ice sheets, and the rise in sea level—have proceeded faster than the models had predicted on average. Uncertainty is not our friend when it comes to the prospects for dangerous climate change.
So we have to ask ourselves, do we feel lucky? If not, than we would perhaps be wise to purchase a planetary insurance policy in the form of policies to dramatically reduce our collective carbon emissions.
A recent article in Esquire by John H. Richardson explored the way various climate scientists (including myself) grapple with the complicated and indeed sometimes emotional task of communicating knowledge, uncertainty, and risk in a way that best informs the contentious debate over human-caused climate change and what to do about it.
OK. So now imagine my disappointment upon coming across an article that purports to embrace the thesis of Climate Shock—in particular, the threat of the "fat tail"—but in fact misunderstands it entirely—and misrepresents, for good measure, the Esquire article and the scientists quoted in it—including me.
The piece in question appeared at the tech-oriented website Quartz, authored by Allison Schrager, a self-described "economist, writer and pension geek" with an interest in "how to hedge risk." The very title of the piece itself "Climate scientists undermine their own science by avoiding the best case scenario" is a falsehood, foreboding a fundamental misunderstanding of all of the principles explained thusfar in this article.
In fairness, Schrager gets some things right. For example, she is correct when she states that:
[Wagner and Weitzman] use finance theory to argue the presence of risk is precisely why we need to limit carbon emissions sooner rather than later. In finance, risk poses a cost. You can pay to reduce it and often, the sooner you do, the cheaper it is to deal with the risk.
And she relevantly quotes Wagner on the the threat of the "heavy tail":
Wagner estimates there's a 10 percent chance of a catastrophic outcome. "That may be unlikely, but it's a huge freakin' problem," he told Quartz.
But it all then goes awry. In what has sadly become an all-too familiar pattern of blaming the scientists (yes—this mess we've gotten ourselves into is all the fault of the scientists!), Schrager levels a number of cheap shots against climate researchers.
She accuses climate scientists, for example, of using "more forceful language" (horrors!) and of seeking to "underplay the uncertainty that still exists" (without even an iota of evidence to support that contention).
Then, in what frankly smacks of concern trolling, expresses her deep distress about what is "at stake":
Considering what's at stake, the extreme measures and playing up the stark predictions are understandable. But exaggerating the likelihood of extreme outcomes not only give deniers ammunition, it undermines convincing—even if not entirely certain—science.
Yes, those climate scientists are "exaggerating extreme outcomes"—and that's what is fueling climate change denialism (something I happen to know a thing or two about) and undermining science!
OK—and the evidence for this laundry list of accusations against climate researchers? A single quote mine of the Esquire piece. And the minee? Yes indeed—your's truly.
Seeking to provide an example of how "climate scientists feel a need to go so extreme" she quotes the following passage in the Esquire article involving me:
As Mann sees it, scientists like [NASA/GISS scientist Gavin] Schmidt who choose to focus on the middle of the curve aren't really being scientific. Worse are pseudo-sympathizers like Bjorn Lomborg who always focus on the gentlest possibilities. Because we're supposed to hope for the best and prepare for the worst, and a real scientific response would also give serious weight to the dark side of the curve.
I've added the emphasis, because Schrager appears to have missed the words "focus" and "also" which are absolutely critical to a meaningful reading of that passage. The point being made there is that we shouldn't only focus on the central tendencies (the mean). We need to ALSO consider the worst-case scenarios—the FAT TAIL, to fully assess the associated risk. It is what Climate Shock is literally all about.
But Schrager continues with the straw man that she's constructed:
As a pension economist I understand the temptation to over-emphasize the worst case.
No. Let's be clear about this. Nobody here is arguing to "over-emphasize the worst case." Not me. Not anyone quoted in the Esquire article. All we're arguing is to not neglect the fat tail.
The straw man continues to the very end of the article, with Schrager concluding:
It's tempting to shout from the rooftops that this is a disaster waiting to happen, because the downside is so scary--even if it will only impact our grandchildren. More so for climate change where the stakes are so much bigger. But that only gives skeptics room to question climate scientists' findings. If anything, the existence of uncertainty provides the best case for swift action because the solutions (cap-and-trade, investment in renewables) are relatively cheap compared to what they will be in the future if worst cases are realized.
Which means that she apparently didn't really get anything out of Climate Shock at all.
The actual reason uncertainty provides the "best case for swift action," as explained in excruciating detail in Climate Shock, is the FAT TAIL of risk emphasized by Wagner and Weitzman (and by me in the Esquire piece). The best reason for taking out a planetary insurance policy is the non-negligible likelihood of climate changes that are considerably greater, and risks that are more severe, that our average current predictions. That, in a sentence, is the thesis of Climate Shock.
There is need for a nuanced discussion of climate risk and solutions, and the challenges inherent in decision making in the face of uncertainty—things I always stress in my commentaries and public speaking engagements about climate change.
But straw man constructions that caricature these nuanced matters and misrepresent the scientists and their efforts to inform this critical discussion, does absolutely nothing to advance that discussion. Indeed, it does quite a bit to harm it.
As we head into the all-important UN summit in Paris this December, which is perhaps our last chance for an international treaty that will avert dangerous and irreversible climate change, it is time for serious people and serious discussions, not straw men and distractions. We simply can't risk that.
Michael Mann is Distinguished Professor of Meteorology at Pennsylvania State University and author of The Hockey Stick and the Climate Wars: Dispatches from the Front Lines and the recently updated and expanded Dire Predictions: Understanding Climate Change.
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