13 Must-Read Climate Change Reports for 2020
By Michael Svoboda
If measured by the number of reports put out in just the first half of this year, the coronavirus has not slowed the work of the international, national, and non-governmental organizations keeping an eye on climate change.
And that's a good thing. Because although it has temporarily reduced the amount of greenhouse gases entering the atmosphere, the coronavirus crisis has done nothing to slow the climatic effects of the carbon dioxide already there after decades of fossil fuel combustion. The planet is still warming, the oceans are still acidifying, and more and more humans are experiencing the consequences.
In this edition of our bookshelf feature, Yale Climate Connections highlights a baker's dozen of these reports, selected to reflect the broad range of concerns that intersect with climate change, including water, national security, media, health, food, finance, energy, and climate and environmental justice.
Readers can also find a link to a much longer list of reports, which provides a measure of depth rather than breadth. Food security, for example, is the subject of six separate reports released since the start of the year, but only one is included in this month's baker's dozen.
The descriptions of the 13 reports are adapted from copy provided by the organizations that published them. All of the reports, those profiled below and those included in the larger downloadable list, are available free, in pdf form online. In some cases, however, interested readers may need to register with the organizations that released them.
State of the Climate 2019: Special Supplement to the Bulletin of the American Meteorological Society, edited by J. Blunden and D.S. Arndt (BAMS 2020, 435 pages, free download available here; a 10-page executive summary is also available)
Compiled by NOAA's National Centers for Environmental Information and published as a supplement to the Bulletin of the American Meteorological Society, State of the Climate provides a detailed update on global climate indicators, notable weather events, and other data collected by monitoring stations and instruments located on land, water, ice, and in space. State of the Climate in 2019 is the 30th issuance of the annual assessment, which has been published by the Bulletin since 1996. The main function of each volume is to document the status and trajectory of many components of the climate system. As a series, however, the report also documents the status and trajectory of our capacity and commitment to observe the climate system.
The First National Flood Risk Assessment: Defining America's Growing Risk, by Flood Modelers (First Street Foundation 2020, 163 pages, free download available here)
The nonprofit research and technology group First Street Foundation has publicly released flood risk data for more than 142 million homes and properties across the country. The data assigns every property in the contiguous United States a "Flood Factor™" based on its cumulative risk of flooding over a thirty-year mortgage. When adjusting changing sea levels, warming sea surface and atmospheric temperatures, and changing precipitation patterns, the Foundation's model finds the number of properties with substantial risk grows to 16.2 million by the year 2050. "The First Annual National Flood Risk Assessment: Defining America's Growing risk" highlights these significant national, state, and city findings of the First Street Foundation Model.
World Water Development Report 2020: Water and Climate Change, by UN Water (UN Educational, Scientific, and Cultural Organization 2020, 235 pages, free download available here)
Climate change will affect the availability, quality and quantity of water for basic human needs, threatening the effective enjoyment of the human rights to water and sanitation for potentially billions of people. The alteration of the water cycle will also pose risks for energy production, food security, human health, economic development, and poverty reduction. The 2020 UN World Water Development Report focuses on the challenges that can be addressed through improving water management. Combining climate change adaptation and mitigation, through water, is a win-win proposal, improving the provision of water supply and sanitation services and combating both the causes and impacts of climate change, including disaster risk reduction.
The State of Food Security and Nutrition in the World 2020: Transforming Food Systems for Affordable Healthy Diets, by FAO, IFAD, UNICEF, WFP and WHO (United Nations 2020, 320 pages, free download available here)
This year, the UN's annual State of Food Security and Nutrition in the World includes a special focus on transforming food systems for affordable healthy diets. It analyses the cost and affordability of healthy diets around the world, by region and in different development contexts. New analysis is presented on the "hidden" health and climate-change costs associated with our current food consumption patterns, as well as the cost savings if we shift towards healthy diets that include sustainability considerations. The report also offers policy recommendations to transform current food systems and make them able to deliver affordable healthy diets for all – crucial to all efforts to achieve Zero Hunger – Sustainable Development Goal No. 2.
WHO Global Strategy on Health, Environment, and Climate Change: The Transformation Need to Improve Lives and Wellbeing through Healthy Environments, by WHO (UN-WHO 2020, 36 pages, free download available here)
The burden of disease attributable to the environment is high and persistent (~ one quarter of all deaths), and further health concerns are posed by global climate change and rapid urbanization. To respond to this situation, a new global strategy on health, environment and climate change has been developed to transform the way we tackle environmental risks by accounting for health in all policies and scaling up disease prevention and health promotion. It needs to be supported by a strengthened health sector, adequate governance mechanisms, and enhanced communication, thereby creating a demand for healthy environments. The new strategy is timely – it responds to and is in line with the 2030 Sustainable Development Agenda and the GPW13.
Cooling Emissions and Policy Synthesis Report: Benefits of Cooling Efficiency and the Kigali Amendment, by UNEP-IEA (UNEP and IEA 2020, 50 pages, free download available here)
In a warming world, prosperity and civilization depend more and more on access to cooling. But the growing demand for cooling will contribute significantly to climate change, both through the leaking of HFCs and other refrigerants, and through emissions of CO2 and black carbon from the mostly fossil fuel-based energy powering air conditioners and other cooling equipment. By combining energy efficiency improvements with the transition away from super-polluting refrigerants, the world could avoid cumulative greenhouse gas emissions of up to 210-460 gigatonnes of carbon dioxide equivalent (GtCO2e) over the next four decades. This is roughly equal to 4-8 years of total annual global greenhouse gas emissions, based on 2018 levels.
The 2035 Report: Plummeting Solar, Wind, and Battery Costs Can Accelerate Our Clean Electricity Future, by Sonia Aggarwal and Mike O'Boyle (Goldman School of Public Policy 2020, 37 pages, free download available here)
Most studies aim for deep decarbonization of electric power systems by 2050, but this report shows, with the latest renewable energy and battery cost data, that we can get there in half that time. The U.S. can achieve 90% clean, carbon-free electricity nationwide by 2035, dependably, at no extra cost to consumers, and without new fossil fuel plants. On the path to 90% over the next 15 years, we can inject $1.7 trillion into the economy, support a net increase of more than 500K energy sector jobs each year, and reduce economy-wide emissions by 27%. This future also retires all existing coal plants by 2035, reduces natural gas generation by 70%, and prevents up to 85,000 premature deaths by 2050. But without robust policy reforms, this future will be lost.
Addressing Climate as a Systemic Risk: A Call to Action for U.S. Financial Regulators, by Veena Ramani (Ceres 2020, 68 pages, free download available here, registration required)
This Ceres report outlines how and why U.S. financial regulators, who are responsible for protecting the stability and competitiveness of the U.S. economy, need to recognize and act on climate change as a systemic risk. It provides more than 50 recommendations for key financial regulators to adopt, including the Federal Reserve Bank (the Fed), the Office of the Comptroller of the Currency (OCC), the Federal Deposit Insurance Corporation (FDIC), the Securities and Exchange Commission (SEC), the Commodity Futures Trading Commission (CTFC), state and federal insurance regulators, the Federal Housing Finance Agency (FHFA), and the Financial Stability Oversight Council (FSOC).
Gender, Climate & Security: Sustaining Inclusive Peace on the Frontlines of Climate Change, by UN Women (UN Environment & Development Programs 2020, 52 pages, free download available here)
Climate change is a defining threat to peace and security in the 21st century – its impacts felt by everyone, but not equally. Gender norms and power dynamics shape how women and men of different backgrounds experience or contribute to insecurity in a changing climate. Grounded in a series of case studies from research and programming experience, this report offers a comprehensive framework for understanding how gender, climate and security are inextricably linked. The report assesses entry points for action across existing global agendas and suggests concrete recommendations for how policymakers, development practitioners and donors can advance three inter-related goals: peace and security, climate action and gender equality.
Evicted by Climate Change: Confronting the Gendered Impacts of Climate-Induced Displacement, by Care International (Care International 2020, 33 pages, free download available here)
This report outlines the causes and consequences of climate-induced displacement, and how the triple injustice of climate change, poverty and gender inequality must be met by transformative action. In this report, CARE draws on key scientific findings as well as its own experience and, most importantly, the experiences of the people CARE seeks to support in managing compound risks: women and girls in vulnerable situations. To tackle climate-induced displacement in a gender-transformative and human-rights based way, CARE calls on all relevant actors to do their part to build a safer, more equitable, inclusive and resilient future that harnesses the power of women and girls within their communities.
Defending Tomorrow: The Climate Crisis and Threats Against Land and Environmental Defenders, by Global Witness (Global Witness 2020, 52 pages, free download available here)
For years, land and environmental defenders have been the first line of defense against climate breakdown. Time after time, they have challenged those companies rampaging through forests, skies, wetlands, oceans and biodiversity hotspots. Yet the crucial role they play, businesses, financiers and governments fail to safeguard the vital and peaceful work of these defenders. The climate crisis is arguably the greatest global and existential threat we face. As it escalates, it will exacerbate many other problems. The question is whether we want to build a better, greener future for our planet and its people. The answer lies in following the leadership, the campaigns and solutions that land and environmental defenders have been honing for generations.
Breaking the Plastic Wave: A Comprehensive Assessment of Pathways Towards Stopping Ocean Plastic Pollution, by Pew Charitable Trust and System IQ (Pew Charitable Trust 2020, 153 pages, free download available here)
Plastic has become ubiquitous. From wrapped food and disposable bottles to microbeads in body washes, it's used widely as packaging or in products because it's versatile, cheap, and convenient. But this convenience comes with a price. Plastic waste is entering the ocean at a rate of about 11 million metric tons a year. How did we get here? We have produced vast quantities of plastic products but have had few ways to regulate their use or properly manage their disposal. "Breaking the Plastic Wave" shows that we can cut annual flows of plastic into the ocean by about 80% in the next 20 years. But no single solution can achieve this goal; rather, we can break the plastic wave only by taking several immediate, ambitious, and concerted actions.
Adapting to a Change Climate: How Collaboration Addresses Unique Challenges in Climate-Change and Environmental Reporting, by Caroline Porter (Center for Cooperative Media 2020, 24 pages, free download available here)
As part of its collaborative journalism program, the Center for Cooperative Media (CCM) at Montclair State University tracks journalism collaborations. In early 2019 the number of climate change-related collaborations seemed to be ticking upward, spurred by the launch of Covering Climate Now, the biggest such collaboration on record. CCM decided to take a look at how journalists are working together to tackle the topic and all of its related issues. The result is the new report researched and written by Caroline Porter. Based on her assessments of 40 climate-related collaborations, she found that there are some climate change-specific reasons that journalism collaborations make sense, beyond the usual economic reasons for such efforts.
Reposted with permission from Yale Climate Connections.
- 'Who Drew It?' Trump Belittles UN Climate Report - EcoWatch ›
- New IPCC Report: Fossil Fuel Divestment Must Start Now - EcoWatch ›
- Climate Change Named Biggest Global Threat in New WEF Risks ... ›
- New Fed Report Finds Climate Change Threatens U.S. Markets - EcoWatch ›
- 'Uninhabitable Hell:' UN Report Warns of Planet's Future for Millions Without Climate Action - EcoWatch ›
- Greenhouse Gas Levels Hit Record High Despite Lockdowns, UN Reports - EcoWatch ›
- 'Stop the Plunder and Start the Healing,' UN Chief Urges in State of the Planet Speech - EcoWatch ›
- Five Climate Change Lessons From 2020 - EcoWatch ›
Scientists consider plastic pollution one of the "most pressing environmental and social issues of the 21st century," but so far, microplastic research has mostly focused on the impact on rivers and oceans.
Plastic waste breaks down into smaller pieces until it becomes microscopic and gets swept up into the atmosphere, where it rides the jet stream and travels across continents, the Cornell Chronicle reported. Researchers discovered this has led to a global plastic cycle as microplastics permeate the environment, according to The Guardian.
"We found a lot of legacy plastic pollution everywhere we looked; it travels in the atmosphere and it deposits all over the world," Janice Brahney, lead author of the study and Utah State University assistant professor of natural resources, told the Cornell Chronicle. "This plastic is not new from this year. It's from what we've already dumped into the environment over several decades."
In the study, published in the journal Proceedings of the National Academy of Sciences, researchers tested the most likely sources of more than 300 samples of airborne microplastics from 11 sites across the western U.S. To their surprise, the researchers found that almost none of the atmospheric microplastics came from plastic waste in cities and towns. "It just didn't work out that way," Professor Natalie Mahowald from Cornell University, who was part of the research team, told The Guardian.
It turns out that 84 percent of atmospheric microplastics came from roads, 11 percent from oceans and five percent from agricultural soil dust, the scientists wrote.
"We did the modeling to find out the sources, not knowing what the sources might be," Mahowald told the Cornell Chronicle. "It's amazing that this much plastic is in the atmosphere at that level, and unfortunately accumulating in the oceans and on land and just recirculating and moving everywhere, including remote places."
The scientists say the level of plastic pollution is expected to increase, raising "questions on the impact of accumulating plastics in the atmosphere on human health. The inhalation of particles can be irritating to lung tissue and lead to serious diseases," The Guardian reported.
The study coincides with other recent reports by researchers, who confirmed the existence of microplastics in New Zealand and Moscow, where airborne plastics are turning up in remote parts of snowy Siberia.
In the most recent study, scientists also learned that plastic particles were more likely to be blown from fields than roads in Africa and Asia, The Guardian reported.
As plastic production increases every year, the scientists stressed that there remains "large uncertainties in the transport, deposition, and source attribution of microplastics," and wrote that further research should be prioritized.
"What we're seeing right now is the accumulation of mismanaged plastics just going up. Some people think it's going to increase by tenfold [per decade]," Mahowald told The Guardian. "But maybe we could solve this before it becomes a huge problem, if we manage our plastics better, before they accumulate in the environment and swirl around everywhere."
- Microplastics Are Increasing in Our Lives, New Research Finds ... ›
- Microplastics Found in Human Organs for First Time - EcoWatch ›
- New Study: 15.5 Million Tons of Microplastics Litter Ocean Floor ... ›
By Michel Penke
More than every second person in the world now has a cellphone, and manufacturers are rolling out bigger, better, slicker models all the time. Many, however, have a bloody history.
Though made in large part of plastic, glass, ceramics, gold and copper, they also contain critical resources. The gallium used for LEDs and the camera flash, the tantalum in capacitors and indium that powers the display were all pulled from the ground — at a price for nature and people.
"Mining raw materials is always problematic, both with regard to human rights and ecology," said Melanie Müller, raw materials expert of the German think tank SWP. "Their production process is pretty toxic."
The gallium and indium in many phones comes from China or South Korea, the tantalum from the Democratic Republic of Congo or Rwanda. All in, such materials comprise less than ten grams of a phone's weight. But these grams finance an international mining industry that causes radioactive earth dumps, poisoned groundwater and Indigenous population displacement.
Environmental Damage: 'Nature Has Been Overexploited'
The problem is that modern technologies don't work without what are known as critical raw materials. Collectively, solar panels, drones, 3D printers and smartphone contain as many as 30 of these different elements sourced from around the globe. A prime example is lithium from Chile, which is essential in the manufacture of batteries for electric vehicles.
"No one, not even within the industry, would deny that mining lithium causes enormous environmental damage," Müller explained, in reference to the artificial lakes companies create when flushing the metal out of underground brine reservoirs. "The process uses vast amounts of water, so you end up with these huge flooded areas where the lithium settles."
This means of extraction results in the destruction and contamination of the natural water system. Unique plants and animals lose access to groundwater and watering holes. There have also been reports of freshwater becoming salinated due to extensive acidic waste water during lithium mining.
But lithium is not the only raw material that causes damage. Securing just one ton of rare earth elements produces 2,000 tons of toxic waste, and has devastated large regions of China, said Günther Hilpert, head of the Asia Research Division of the German think tank SWP.
He says companies there have adopted a process of spraying acid over the mining areas in order to separate the rare earths from other ores, and that mined areas are often abandoned after excavation.
"They are no longer viable for agricultural use," Hilpert said. "Nature has been overexploited."
China is not the only country with low environmental mining standards and poor resource governance. In Madagascar, for example, a thriving illegal gem and metal mining sector has been linked to rainforest depletion and destruction of natural lemur habitats.
States like Madagascar, Rwanda and the DRC score poorly on the Environmental Performance Index that ranks 180 countries for their effort on factors including conservation, air quality, waste management and emissions. Environmentalists are therefore particularly concerned that these countries are mining highly toxic materials like beryllium, tantalum and cobalt.
But it is not only nature that suffers from the extraction of high-demand critical raw materials.
"It is a dirty, toxic, partly radioactive industry," Hilpert said. "China, for example, has never really cared about human rights when it comes to achieving production targets."
Dirty, Toxic, Radioactive: Working in the Mining Sector
One of the most extreme examples is Baotou, a Chinese city in Inner Mongolia, where rare earth mining poisoned surrounding farms and nearby villages, causing thousands of people to leave the area.
In 2012, The Guardian described a toxic lake created in conjunction with rare earth mining as "a murky expanse of water, in which no fish or algae can survive. The shore is coated with a black crust, so thick you can walk on it. Into this huge, 10 sq km tailings pond nearby factories discharge water loaded with chemicals used to process the 17 most sought after minerals in the world."
Local residents reported health issues including aching legs, diabetes, osteoporosis and chest problems, The Guardian wrote.
South Africa has also been held up for turning a blind eye to the health impacts of mining.
"The platinum sector in South Africa has been criticized for performing very poorly on human rights — even within the raw materials sector," Müller said.
In 2012, security forces killed 34 miners who had been protesting poor working conditions and low wages at a mine owned by the British company Lonmin. What became known as the "Marikana massacre" triggered several spontaneous strikes across the country's mining sector.
Müller says miners can still face exposure to acid drainage — a frequent byproduct of platinum mining — that can cause chemical burns and severe lung damage. Though this can be prevented by a careful waste system.
Some progress was made in 2016 when the South African government announced plans to make mining companies pay $800 million (€679 million) for recycling acid mine water. But they didn't all comply. In 2020, activists sued Australian-owned mining company Mintails and the government to cover the cost of environmental cleanup.
Another massive issue around mining is water consumption. Since the extraction of critical raw materials is very water intensive, drought prone countries such as South Africa, have witnessed an increase in conflicts over supply.
For years, industry, government and the South African public debated – without a clear agreement – whether companies should get privileged access to water and how much the population may suffer from shortages.
Mining in Brazil: Replacing Nature, People, Land Rights
Beyond the direct health and environmental impact of mining toxic substances, quarrying critical raw materials destroys livelihoods, as developments in Brazil demonstrate.
"Brazil is the major worldwide niobium producer and reserves in [the state of] Minas Gerais would last more than 200 years [at the current rate of demand]," said Juliana Siqueira-Gay, environmental engineer and Ph.D. student at the University of São Paulo.
While the overall number of niobium mining requests is stagnating, the share of claims for Indigenous land has skyrocketed from 3 to 36 percent within one year. If granted, 23 percent of the Amazon forest and the homeland of 222 Indigenous groups could fall victim to deforestation in the name of mining, a study by Siqueira-Gay finds.
In early 2020, Brazilian President Jair Bolsonaro signed a bill which would allow corporations to develop areas populated by Indigenous communities in the future. The law has not yet entered into force, but "this policy could have long-lasting negative effects on Brazil's socio-biodiversity," said Siqueira-Gay.
One example are the niobium reserves in Seis Lagos, in Brazil's northeast, which could be quarried to build electrolytic capacitors for smartphones.
"They overlap the Balaio Indigenous land and it would cause major impacts in Indigenous communities by clearing forests responsible for providing food, raw materials and regulating the local climate," Siqueira-Gay explained.
She says scientific good practice guidelines offer a blueprint for sustainable mining that adheres to human rights and protects forests. Quarries in South America — and especially Brazil — funded by multilaterial banks like the International Finance Corporation of the World Bank Group have to follow these guidelines, Siqueira-Gay said.
They force companies to develop sustainable water supply, minimize acid exposure and re-vegetate mined surfaces. "First, negative impacts must be avoided, then minimized and at last compensated — not the other way around."
Reposted with permission from DW.
Researchers at UC-Riverside are investigating how barley, a key ingredient in beer, survives in such a wide variety of climates with hopes of learning what exactly makes it so resilient across climates.
Barley was first grown domestically in Southwest Asia about 10,000 year ago and is grown around the world, from Egypt to Minnesota.
Barley's prime growing regions have shifted northward in recent decades as global temperatures have risen due to climate change caused by human extraction and combustion of fossil fuels.
Chuck Skypeck, technical brewing projects manager for the Brewers Association located in Boulder, Colorado, told E&E climate change's effects are impacting the brewing industry.
"Certainly dynamic growing conditions, water scarcity, extreme weather events, growers' planting decisions can all affect both pricing and availability of brewers' supply of malted barley," he told E&E News.
For a deeper dive:
France moved one step closer this weekend to banning short-haul flights in an attempt to fight the climate crisis.
A bill prohibiting regional flights that could be replaced with an existing train journey of less than two and a half hours passed the country's National Assembly late on Saturday, as Reuters reported.
"We know that aviation is a contributor of carbon dioxide and that because of climate change we must reduce emissions," Industry Minister Agnes Pannier-Runacher told Europe 1 radio, according to Reuters.
The measure now has to pass the French Senate, then return to the lower house for a final vote. It would end regional flights between Paris's Orly airport and cities like Nantes and Bordeaux, The Guardian explained. It would not, however, impact connecting flights through Paris's Charles de Gaulle/Roissy airport.
The bill is part of a legislative package which aims to reduce France's emissions by 40 percent of 1990 levels by 2030, Reuters reported. It is a watered-down version of a proposal suggested by France's Citizens' Convention on Climate, BBC News explained. This group, which was formed by President Emmanuel Macron in 2019 and included 150 ordinary citizens, had put forward a ban on flights that could be replaced with an existing train journey of under four hours.
However, the journey length was lowered after protests from KLM-Air France, which had suffered heavy losses due to the coronavirus pandemic, and regions who were concerned about being left out of national transit networks, as The Guardian explained.
"We have chosen two and a half hours because four hours risks isolating landlocked territories including the greater Massif Central, which would be iniquitous," transport minister Jean-Baptiste Djebbari said, as The Guardian reported.
However, some environmental and consumer groups objected to the changes. The organization UFC-Que Choisir compared plane routes with equivalent train journeys of under four hours and found that the plane trips emitted an average of 77 times more carbon dioxide per passenger than the train journeys. At the same time, the train alternatives were cheaper and only as much as 40 minutes longer.
"[T]he government's choice actually aims to empty the measure of its substance," the group said, according to The Guardian.
The new measure also opens the French government to charges of hypocrisy. It bailed out Air France-KLM to the tune of a seven-billion euro loan last year, though it did require the airline to drop some domestic routes as a condition. Then, days before the measure passed, it more than doubled its stake in the airline, BBC News reported. However, Pannier-Runacher insisted to Europe 1 radio that it was possible to balance fighting climate change and supporting struggling businesses.
"Equally, we must support our companies and not let them fall by the wayside," she said, as Reuters reported.
This is not the first time that climate measures and aviation bailouts have coincided in the wake of the coronavirus pandemic. Austrian Airlines replaced its Vienna-Salzburg flight with additional train service after it received government money dependent on cutting greenhouse gas emissions, BBC News reported.
The number of flights worldwide declined almost 42 percent in 2020 when compared with 2019. It is expected that global aviation may not fully recover until 2024, according to Reuters.
- Could a Tax on International Travel Fund a Country's Response to ... ›
- Most People in the UK Back Limits on Flying to Tackle Climate Crisis ... ›
- To Fly or Not to Fly? The Environmental Cost of Air Travel - EcoWatch ›
Four gray whales have washed up dead near San Francisco within nine days, and at least one cause of death has been attributed to a ship strike.
More whales than usual have been washing up dead since 2019, and the West Coast gray whale population continues to suffer from an unusual mortality event, defined by the National Oceanic and Atmospheric Administration (NOAA) as "a stranding that is unexpected; involves a significant die-off of any marine mammal population; and demands immediate response."
"It's alarming to respond to four dead gray whales in just over a week because it really puts into perspective the current challenges faced by this species," Dr. Pádraig Duignan, director of pathology at the Marine Mammal Center, said in a press release.
As the world's largest marine mammal hospital, the Sausalito-based center has been investigating the recent spate of deaths. The first involved a 41-foot female who washed up dead at San Francisco's Crissy Field on March 31, SFGate reported. The cause of death remains a mystery, as the whale was in good condition with a full stomach. The second, another female, washed up on April 3 at Fitzgerald Marine Reserve on Moss Beach.
"That animal's cause of death, we suspect, was ship strike," the Marine Mammal Center's Giancarlo Rulli told SFGate. "Our plan is to eventually head back out to that whale and take more samples."
The third whale washed up April 7 near Berkeley Marina, The AP reported. The center determined it was a 37-foot male in average condition, with no evidence of illness or injury.
A 41-foot female turned up the next day on Marin County's Muir Beach. She suffered bruising and hemorrhaging around the jaw and neck vertebrae, indicating a vessel strike.
Vessel strikes are one of the leading causes of death for gray whales examined by the Marine Mammal Center, along with entanglements in fishing gear and malnutrition. While the species is not endangered, the population has declined by 25 percent since last assessed in 2016, CNN reported.
West Coast gray whales travel 10,000 miles every year between Mexico and the Arctic, according to The AP. They spend the winter breeding off of Baja California, and feed along the California coast in spring and summer on their way back north. The Marine Mammal Center began noticing a problem for the migrating whales in 2019.
"Our team hasn't responded to this number of dead gray whales in such a short span since 2019 when we performed a startling 13 necropsies in the San Francisco Bay Area," Dr. Duignan said in the press release.
The 2019 deaths led NOAA to declare an unusual mortality event for West Coast gray whales. It is similar to another event that happened from 1999 to 2000, after which the whales' numbers rebounded to even higher levels. This suggests population dips and rises may not be uncommon for the species. However, it is also possible that the climate crisis is playing a role. The 2019 deaths were linked to malnutrition, and warmer waters can reduce the amount of food whales have to eat in the Arctic, giving them less energy for their migration, CNN explained. Overfishing can also play a role in depriving whales of food, the Marine Mammal Center said.
Dr. Jeff Boehm, Marine Mammal Center CEO and veterinarian, told CNN that he had observed an uptick in shipping traffic after the pandemic caused a slowdown. At the same time, the center is less able to conduct research because of COVID-19 safety precautions. And even in the best of times, only around 10 percent of dead whales wash up on shore, The AP reported.
"This many dead whales in a week is shocking, especially because these animals are the tip of the iceberg," Kristen Monsell, legal director of the Center for Biological Diversity's Oceans program, told The AP.
- Drones Capture Stunning Footage of Humpback and Gray Whales ... ›
- Ninth Gray Whale in Two Months Washes Up Dead in Bay Area ... ›