Hurricane Season 2019: Global Warming, Forecasts and Probabilities
By Astrid Caldas
On May 21, the first named storm of 2019, Andrea, was recorded on the north Atlantic. This makes 2019 the fifth consecutive year that a named storm has formed before the official start of Atlantic hurricane season.
Something caught my eye when I read that: the number five. That's because, according to NASA, 2018 was the fourth warmest year in a continued warming trend since record keeping began in the 1880's, with temperatures 1.5 degrees Fahrenheit (0.83 degrees Celsius) warmer than the 1951 to 1980 mean. And with it, a string of five consecutive years have been recorded as the five warmest on record. I will say this again: the last five years have been the five warmest years on record.
Is climate change having an effect on hurricane season, or on hurricanes themselves? Hurricane season starts on June 1st. Let's take a look at the latest forecasts and science.
Hurricane Forecasts and Their Messages
On April 16, Colorado State University (CSU) released its hurricane outlook for the 2019 season, forecasting 13 named storms with 5 of them turning into hurricanes, of which 2 would classify as major (categories 3 and above).
On May 23, the National Hurricane Center, part of the National Atmospheric and Oceanic Administration (NOAA) released their forecast, predicting a "near-normal" season with 9 to 15 named storms and 4 to 8 hurricanes, with 2 to 4 being major ones. An average season has 12 named storms, six hurricanes and three major hurricanes. The numbers are very similar to the ones from CSU.
The odds for that near-normal season are 40%. Odds for above-normal or below-normal activity are both at 30%. But, as I mentioned last year, odds are not certain predictions. They are just that: odds (see below for more on that). And the last couple of years certainly reminded us of that.
Years to Remember – in More Than One Way
NOAA's forecast for the 2018 season also had a near-normal probability of 40%, with 35% odds of it being above normal, and 25% odds of being below-normal. It forecast 10 to 16 named storms and 5 to 9 hurricanes, with 1 to 4 being major. What we saw was a season tilted toward the higher side of the predictions — there were 15 named storms and eight hurricanes. Two of those were major, and two hurricanes — Michael and Florence, the latter not a major hurricane but a category 1 — caused roughly $50 billion in estimated damage.
While the probabilistic predictions may not have raised any eyebrows, when a record four hurricanes were active at the same time, that caught my eye.
If we look further back, at 2017, the probability of an above-normal season was at 45%, and below-normal activity was at 20%. The forecast called for 5 to 9 hurricanes, with 2 to 5 being major — and the reality blew the predictions: we had 10 hurricanes with 6 major ones. Three of these major ones hit the U.S., and nobody will forget the string of names Harvey, Irma and Maria anytime soon. That also caught my eye.
However, I was not surprised when the numbers fell outside of the given range.
Understanding the Forecast
That is because the range in numbers given in NOAA's forecast has a 70% probability, meaning that "The seasonal activity is expected to fall within these ranges in 7 out of 10 seasons with similar climate conditions and uncertainties to those expected this year. They do not represent the total possible ranges of activity seen in past similar years." So, there you have it, in plain language, that the actual numbers for 2019 (as in any season) may be different from the ones in the forecast.
What Do These Seasons Tell Us?
Forecasts are based on probabilities calculated from conditions at the time of the forecast, and as such, there is ample room for conditions to change and actual facts to fall outside the probabilistic calculations, as the numbers for 2017 show. At the time of the 2018 forecast, sea surface temperatures were running below average in the area where tropical storms form, and the forecast was based on those conditions. For this year, NOAA stated that there are competing signals affecting the forecast: an ongoing weak El Niño is expected to suppress intensity of Atlantic hurricane activity, while warmer-than-average surface waters and an enhanced African monsoon are forces that could lead to increased activity. Will these conditions change and affect hurricane activity? Probably. That is also why NOAA releases an updated forecast later in the season, usually in early August. Mind you, the updated forecast is based on the same probabilistic calculations, only using updated conditions.
Most importantly, it only takes one hurricane to hit to cause possible devastation. Nobody can tell ahead of time how many hurricanes in a season will strike land. One should always remember that, and be prepared, such as by following the NOAA/NWS storm tracking page and FEMA hurricane preparation guidance. And with the last couple of seasons seeing major hurricanes (some making landfall), preparedness takes on a new urgency.
But are we really seeing more of these major hurricanes, or is it just an impression — or coincidence?
Hurricanes Are Getting Stronger
The fact is that global warming is loading the dice when it comes to hurricane strength, with abnormally warm water being one of the culprits because it has the potential to increase hurricane power. Two of the most powerful hurricanes in recent history, Harvey and Florence, gained immense strength in very little time, and one of the reasons was that the sea surface temperature of the water in its path was running well above normal. In the case of Harvey, Gulf waters were warmer than any time on record, and temperatures along Florence's path were 3.6°F (2°C) hotter than normal. That warmer water is linked to human-caused warming due to emissions from burning coal, oil and gas. And it is worth noting that, after further analysis, hurricane Michael was upgraded to a category 5 in April 2019, months after it hit in 2018.
But it is not just the wind and strength of a hurricane that are amplified by climate change: global warming can also increase the amount of rain that hurricanes bring. Warmer air holds more moisture (read: more water to fall when it rains), and global average temperature is currently about 1.8°F (1°C) warmer than it was in the late 1800s. In fact, a study found that the record rainfall from Harvey was roughly three times more likely and 15% more intense than in a world without global warming. Another study found that higher ocean heat content and sea surface temperatures make hurricanes such as Harvey "more intense, bigger, and longer lasting and greatly increase their flooding rains."
Furthermore, research suggests that there has been an increase in intense hurricane activity over the past 40 years, and since the mid-1970s the number of strong hurricanes reaching categories 3 and above has roughly doubled.
So, while we wait for this hurricane season to develop, let's be mindful of probabilities, a changing climate, changing conditions, and most of all, preparedness. It reduces risks, helps ensure communities withstand the next storm, and can save lives.
Astrid Caldas is a climate scientist with the Climate & Energy program at the Union of Concerned Scientists.
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By Charli Shield
When an elephant dies in the wild, it's not uncommon to later find its bones scattered throughout the surrounding landscape.
Elephant Burial Grounds<p>Highly social creatures that form deep familial bonds, elephants have long been observed gathering at the site where a peer or family member has died — often spending hours, even days, quietly investigating the bodies or the bones of other dead elephants.</p><p>Although the popular idea that dying elephants are instinctively drawn to special communal graves — so-called "elephant graveyards" — is a myth, their tendency to go out of their way to visit the bones and tusks of the deceased isn't unlike human rituals at graveyards, says animal psychologist Karen McComb.</p><p>"They spend a lot of time touching and smelling skulls and ivory, placing the soles of their feet gently on top of them, and also lifting them up with their trunks," McComb, who's been studying African elephants for 25 years in Kenya's Amboseli National Park, told DW.</p><p>The most striking part of watching an elephant experience loss, Poole recalls, is the quietude. She still remembers one of the first elephant deaths she witnessed; a mother who birthed a stillborn calf. That elephant stayed with its baby for two days, trying to lift it and defending it from vultures and hyenas.</p><p>"I was so struck by the expression on her face and her body. She looked so dejected. It was really like, 'Oh God, these animals grieve…'. It was just so different," Poole told DW. </p>
Witnessing Emotions in Animals<p>Not all scientists are comfortable concluding that elephants grieve. Among the more than 30 reports of elephant reactions to death that Wittemyer co-reviewed in <a href="https://link.springer.com/article/10.1007/s10329-019-00766-5" target="_blank">a study published in November 2019</a> were accounts of "enormous variation and nuance" he says. "It can be incredibly involved and intricate for extended periods or can be relatively cursory checks."</p><p>In Wittemyer's own experience, it can be difficult not to attribute some kind of emotional experience to the more involved interactions between elephants and their dead.</p><p>He shares the story of an "extraordinary event" involving the death of a 55 year-old matriarch in Kenya in a protected area that happened to be near his place of work. She was visited by multiple unrelated families while she was dying, including another matriarch that exerted such enormous effort attempting to lift her to her feet that she broke her tusk, which Wittemyer says, is "like breaking a tooth." </p><p><span></span>"It was a remarkable example of this heightened emotional state, it was very clearly a very stressful interaction," he says.</p>
A Different Sensory World<p>One factor that limits our ability to fully grasp the way elephants process and respond to loss is our markedly different sensory experiences of the world.</p><p>An elephant's world is fundamentally olfactory — based on smell. Ours is visual. Previous <a href="https://pubmed.ncbi.nlm.nih.gov/25053675/" target="_blank">research</a> has shown elephants possess the most scent receptors of any mammal, and can <a href="https://pubmed.ncbi.nlm.nih.gov/17949977/" target="_blank">use smell</a> to discern the difference between different human tribes from the same local area.</p><p>That could explain why elephants exhibit such interest in sniffing the bones and tusks of others, as a <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1617198/" target="_blank">2005 study</a> from McCombs highlighted. When presented with the skulls and ivory of long-dead elephants and those from other large herbivores, including rhino and buffalo, McCombs and her team found elephants approached and were specifically attracted to the remains of their own species. </p><p>Without access to the smells an elephant picks up on, Wittemyer says "an enormous amount of stuff" could be missed by humans when studying these behaviors.</p>
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By Abdullahi Alim
The 2008 financial crisis spurred a number of youth movements including Occupy Wall Street and the Arab Spring. A decade later, this anger resurfaced in a new wave of global protests, from Hong Kong to Beirut to London, only this time driven by the children of the 2008 financial crisis.
1. Learn From the Past<p>Young people tend to be comfortable with change. Their instant adoption of technology is an example.<a target="_blank"> However, they may lack an understanding of the more permanent realities – requiring patience and </a>stoicism.</p><p>This wisdom is typically in the hands of individuals who either work within systems or who have accumulated far more tenure. This was effectively echoed by 13-year old activist, Naomi Wadler who <a href="https://www.youtube.com/watch?v=17Aa6XLZe9A" target="_blank">said</a>, "We can educate our youth a lot better. We're not delving deeper into social justice movements from the past."</p><p>Youth movements that are informed by the success and pitfalls of prior efforts offer a more promising outcome. Take for example, the Black Lives Matter (BLM) movement, co-founded by a 32-year old Alicia Garza.<span></span></p><p>Unlike the civil rights movement of the 1960's, BLM lacks central governance. This means that opponents can't attack its leadership as a means to discredit the whole movement. In the 1960's, this is exactly what happened to the civil rights movement, when critics went after Martin Luther King, stalling the collective efforts of the movement.</p><p>In fact, King spent his final year <a href="https://eu.usatoday.com/story/opinion/2018/04/04/martin-luther-king-jr-50-years-assassination-donald-trump-disapproval-column/482242002/" target="_blank">mired in public disapproval</a> with over 75% of Americans considering him "irrelevant" including 60% of African Americans.</p><p>By studying the legacy of previous efforts, BLM has managed to rally approximately <a href="https://www.washingtonpost.com/politics/big-majorities-support-protests-over-floyd-killing-and-say-police-need-to-change-poll-finds/2020/06/08/6742d52c-a9b9-11ea-9063-e69bd6520940_story.html" target="_blank">75% of the American public</a>; a feat that will undeniably ensure the longevity of its cause.</p><p>For the youth climate movement, it too must reconcile the long record of activism that predates its tenure. It ought to model itself as an intergenerational movement by giving greater credence to the activists, environmental scientists and <a href="https://www.weforum.org/agenda/2020/05/juan-manuel-santos-colombia-indigenous-peoples-coronavirus-pandemic-climate-change-environment-nature/" target="_blank">indigenous elders</a> that have fought for climate justice before its inception and ultimately signal the nuance and maturity that would activate allies within systems of power.</p>
2. Become Part of Systems Change<p>From the college campus to the coworking space, you would be hard pressed to avoid the sight of a social impact competition that invites young people to resolve some of the world's most intractable problems.<br></p><p>Unsurprisingly, this often leads to problematic and incomplete solutions. Take, for example, <a href="https://ssir.org/articles/entry/tackling_heropreneurship" target="_blank">an app for African farmers</a> developed by students who have neither farmed nor been to Africa.<br></p><p>Fortunately, there is a growing shift towards empowering young people to better diagnose the systems that uphold inequality. For example, Oxford University hosts the annual <a href="http://www.oxfordglobalchallenge.com/" target="_blank">Map the System</a> competition to celebrate some of the most promising youth-led mappings and the World Economic Forum's <a href="https://www.globalshapers.org/story" target="_blank">Global Shapers Community</a> convenes more than 7,000 young people under the age of 30 to address local, regional and global challenges.</p><p>To achieve systemic change, young changemakers must first unpack systems into <a href="https://wtf.tw/ref/meadows.pdf" target="_blank">three components</a>; elements, interconnections and functions:</p><ul><li>Elements are essentially the key stakeholders in the system. This can include individuals, land or objects.</li><li>Interconnections are the laws and social norms that bind the elements together.</li><li>Functions are the end-goals.</li></ul><p>Take for example, the persistence of sexual harassment in the workplace as a systems issue. The elements in the system would include the victim, perpetrator and other intermediary bodies including line managers and human resource teams. The interconnections could include forced arbitration laws that prohibit employees from seeking public courts and a managerial culture that protects high performing perpetrators and pressures victims into silence. In which case, the ultimate functions (or rather dysfunctions) of the system discourage victims from pursuing action and enable perpetrators and enablers to enjoy the benefits of career progression without due trial.</p><p>Systemic change is about redesigning the interconnections (the cultural norms and laws). In the example above, it involves challenging the use of private arbitrary courts and uprooting a toxic work culture. Reclaiming this intuition opens a pandora's box that ultimately allows for any given system to operate more inclusively.<br></p><p>Today, young changemakers can rely on online resources like <a href="http://systems-ledleadership.com/" target="_blank">Systems-Led-Leadership</a> to analyze any given system of inequality and then direct their unique skills and knowledge towards the most effective intervention.</p>
3. Avoid Heropreneurship<p>Daniela Papi-Thornton first coined the term <a href="http://tacklingheropreneurship.com/" target="_blank">heropreneurship</a> to describe a growing trend that credits social change to the "founder" of an organization or movement exclusively.</p><p>This culture has inspired an entire generation of young change-makers who are swayed by the allure of the "heroic" founder and whose behaviors are validated through youth awards, grants and speaking circuits that glorify a role in the limelight. This pervasive culture undercuts the entire spectrum of actors that really creates social change.</p><p>Social change does not necessarily warrant the creation of a new organization or movement. Change-makers should consider the root causes that perpetuate and uphold inequalities and then map the existing players and solutions. This process might point to scaling up the work of an existing organization or helping a local candidate run for office.<br><br>For young people who wish to create social change, their efforts – while extremely important – may go unnoticed. This is an expectation that needs to be managed.<br></p>
4. Know Your Place<p>In 2016, a political action committee entitled <a href="http://canyounot.org/" target="_blank">Can You Not</a> emerged with the aim of discouraging white men from running for office in minority districts.</p><p>Despite the comical graphics, the campaign highlights an important question for young changemakers, particularly if they advocate for issues that they have not lived: in the quest for social change, can the actions of change-makers unwittingly perpetuate injustices, even as they seek to end them?<br></p><p>In the example above, could the notion of a white man effectively assuming the role of a translator between minority communities and government only reinforce their structural underrepresentation in political decision-making? Could the desire to assume office without lived experience also signal little faith in the leadership of the very communities being served?<br></p><p>A more effective approach to social change may be to encourage such actors to take stock of the unintended consequences of misrepresentation. In doing so, they may come to appreciate the importance of "stepping back" to allow others to "step forward." More concretely, this could result in building trusted relationships with the community and eventually empowering more local voices to consider public leadership.<br></p><p>For young changemakers, it is pivotal that they assess their own standing in a given system and avoid perpetuating the very inequalities they wish to tackle.</p>
Strategic Intelligence: Youth Perspectives. World Economic Forum
A More Targeted, Effective Kind of Activism<p>Social media has played its critical part in providing young people with a vehicle to advocate for social reform.</p><p>Whether it's <a href="https://www.theguardian.com/environment/2019/sep/23/greta-thunberg-speech-un-2019-address" target="_blank">Greta Thunberg's speech</a> during the United Nations General Assembly in 2019 or <a href="https://variety.com/2018/politics/features/emma-gonzalez-parkland-interview-1202972485/" target="_blank">Emma Gonzalez</a> rallying crowds for more stringent gun control. younger voices are swaying public opinion and pressuring political systems to operate more inclusively.<br></p><p>The impact of these extraordinary young people is inspiring, but arguably they struggle to provide a course of action for the average young person who is motivated to pursue social change. The inconvenient truth is that social reform is difficult and even more so for a young person who wrestles with challenges related to experience and credibility.<br></p><p>To be more effective, young changemakers must forge greater bonds with late-stage activists as well as potential allies within systems of power. They must also understand the systems that uphold equality and pinpoint the intervention that would most likely inspire systemic change.<br></p><p>Finally, it is pivotal that they invest in a support system and seek to dissolve <a href="https://www.weforum.org/agenda/2020/06/this-is-how-wellbeing-drives-social-change-and-why-cultural-leaders-need-to-talk-about-it" target="_blank">personal anxieties</a> that may compromise their change-making potential.</p><p>It's time for youth activism to grow up.</p>
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