Climate 411

What you need to know about hurricanes and climate change

Photo: NOAA

This post was co-authored by EDF Postdoctoral Climate Science Fellow Tianyi Sun

Today Hurricane Laura made landfall in Louisiana as a Category 4 hurricane, causing death and destruction. Louisianans and Texans in its path are now mourning and looking ahead to a long and painful recovery.

Laura had winds up to 150 miles per hour, making it one of the strongest hurricanes on record to ever hit the Gulf Coast in the United States. It tied the record for how quickly it intensified, driving questions about the role of climate change in creating and fueling this monster storm.

A look at the latest science

Scientists have been actively studying how climate change affects hurricanes for decades, and the evidence that it can influence several aspects of hurricanes continues to grow.

Overall, climate change is making these already dangerous weather events even more perilous. They are stronger, wetter, slower, and intensify more rapidly. Major storms are occurring more often and piling on heavier rainfall, and scientists anticipate the strongest storms will continue to increase in frequency. Sea level rise, along with stronger winds, are also worsening storm surges, causing more coastal flooding.

All aspects of hurricanes – from formation to track to strength to damages – can be influenced to some degree by climate change, through warmer waters, more moisture in the atmosphere, changing air patterns, and sea level rise.

For some connections, such as how climate change affects hurricane strength and its damages, the science is simple and robust. For other connections, such as how climate change affects hurricane formation and track, the science is more complicated and nuanced.

Here we break down what we know about how climate change affects four key aspects of hurricanes


1. Hurricane formation – competing factors at play
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Also posted in Extreme Weather, News, Oceans, Science / Comments are closed

Four takeaways on climate change and sea level rise in the latest IPCC report

The Intergovernmental Panel on Climate Change has published yet another alarming report about the dangers we face from the climate crisis.

The Special Report on the Ocean and Cryosphere in a Changing Climate synthesizes the latest science on how the oceans and frozen parts of the world have changed, and will continue to change, because of global warming.

More than 100 scientists from 36 countries summarized findings from almost 7,000 peer reviewed research studies. The authors addressed over 30,000 comments from expert reviewers and governments in 80 countries.

A major focus of the report is sea level rise, a climate change impact that is especially serious to those who live in coastal regions – which is more than a quarter of the world’s population. Recent advances in science, such as higher quality data, improved physical understanding, and agreements across modeling studies have improved understanding of the threat of sea level rise.

Here are four of the report’s most important takeaways on sea level rise:

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Also posted in Arctic & Antarctic, Extreme Weather, Greenhouse Gas Emissions, News, Oceans, Policy, Science / Read 3 Responses

Climate Changed: Millions of Americans Already Living Beyond Temperature Goal

(This post was co-authored by Nat Keohane and David Festa

Earth as seen from a NOAA weather satellite. Photo: NASA

The hotter future that climate pollution is creating has already arrived for 1 in 10 Americans. A new analysis from The Washington Post shows that 34 million Americans live in areas that have now seen average temperatures rise farther than the goal set by the Paris climate agreement — 2 degrees centigrade or about 3.6 degrees Fahrenheit.

Even as the Trump administration attempts to dismantle policies to reduce climate pollution, average temperatures have shot up in parts of North Dakota, Montana, Utah, in the Northeast and Southwest, and elsewhere. These increases – which are not summer spikes, but year-round averages – are part of the trend that is worsening wildfires, making more damaging storms, and creating serious problems for farmers.

The Post‘s Steven Mufson, Chris Mooney, Juliet Eilperin, and John Muyskens surveyed more than 100 years of weather data about the continental United States from the National Oceanic and Atmospheric Administration, NASA and other scientific sources. Their work provides a bold-face headline to the peer-reviewed science that shows the dangerous speed at which our world is warming. It comes on the heels of last week’s United Nations report on land use and climate change, which warned of increasing water scarcity and food shortages from continued warming.

If there is good news in these disturbing reports, it is that the tangible reality of climate change may be spurring action to reduce emissions and begin the long overdue process of building resilience. Despite the Trump administration’s surrender on the issue, many states are newly aggressive. New Jersey, one of the states that the Washington Post reports is getting hottest fastest, just enacted a series of climate pollution reduction policies. Minnesota, California, and Maine – all states with areas of 2-degree increase – have recently put in place ambitious climate action policies. Colorado, another state with hotspots, just enacted landmark legislation that sets some of the strongest targets in the country for reducing climate pollution.

We can’t solve the climate crisis without leadership from the federal government, but there are paths forward to a better outcome. Failing to act because we hear bad news will only make the problem tougher. If we can generate the political will, we can make our future dramatically safer by moving to a 100% clean economy.

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Also posted in Cities and states, Extreme Weather, News, Policy, Science / Comments are closed

Year in Review: 18 numbers that tell 2018’s story of the environment, health, and climate

2018 brought with it a torrent of stories that now shape the world we live in and will shape 2019 and years to come.

From a disgraced EPA Administrator, to urgent reports on climate change, the year showed how far we’ve come and how much work remains—especially as President Trump and his administration continue to assault safeguards and deny the reality of a warming world.

Here, we recap the 18 numbers that encapsulate the year that was, and what we’ll be keeping a close eye on in the year to come.

  1. Public Health Threat #1: Acting EPA Administrator Andrew Wheeler. Former coal lobbyist Wheeler took the reins after the end of Scott Pruitt’s destructive tenure, and picked up right where Pruitt left off. Since then, Wheeler has targeted several foundational health and environmental safeguards. It’s now expected that Wheeler will be nominated for the post permanently. Keep reading to see how dangerous that could be to the American people and our planet.
  2. Two mothers who lost their sons because of exposure to methylene chloride, a dangerous chemical in common paint strippers, met with Pruitt and members of Congress from both parties. These moms asked EPA to support a ban on consumer and most commercial uses of methylene chloride. Over 6 months ago, Pruitt said he’d do so, but no action has been taken since.
  3. As for other chemicals the Trump EPA is flouting 2016’s Toxic Substance Control Act amendments, allowing potentially dangerous chemicals into the marketplace and consumers’ homes. Here are three examples.
  4. Wheeler is proposing to gut the EPA methane rules, a move that could result in more than 400,000 tons of additional potent methane, even though some leading companies have asked EPA to regulate methane emissions from oil and gas.
  5. Check out this list of five states that took bold action on climate change this year, showing the kinds of common-sense, economic solutions that can be implemented at scale while protecting people, our economy and our environment.
  6. According to the World Health Organization air pollution kills an estimated 600,000 children every year under the age of 15 and accounts for almost 1 in 10 deaths in children under five. The report found links between air pollution and childhood cancers, asthma, pneumonia and other respiratory infections, making it one of the leading threats to child health.
  7. It’s not all doom and gloom. Prompted by the urgency to act on climate and the advancement of affordable, renewable energy technologies, we’ve seen seven signs that the global energy economy is in transition.
  8. Eight hurricanes formed in Atlantic waters this year, two of which—Hurricanes Florence and Michael—devastated states across the Mid-Atlantic and Southeast. These kinds of super storms are becoming more powerful—and more destructive—due to warmer water, higher seas, shifting weather patterns and increased moisture in the air.
  9. On the other side of the country, California saw wildfires ravage the state, destroying entire towns and killing scores. In total, the fires are expected to cost insurers more than $9 billion and signal the kind of climate dangers the world could face more regularly if greenhouse gases are allowed to pollute our air unchecked.
  10. Might that have something to do with the fact that fossil fuel industries outspent clean energy advocates on climate lobbying by a startling 10 to 1?
  11. By EPA’s own calculations, the Mercury and Air Toxic Standards prevent as many as 11,000 deaths per year, yet the Administration reportedly wants to undercut the rule anyway, with a proposal expected imminently.
  12. A concentrated effort by the oil industry to fight back against clean car standards resulted in more than a quarter of the 12,000 “public” comments submitted to the federal register reflecting the language written by a pro-industry group. Marathon Petroleum, the country’s largest refiner, lobbyists for Exxon Mobil, Chevron, and Phillips 66, joined a network funded by the Koch Brothers network in a massive effort to fight standards that would reduce pollution from vehicles and save Americans money at the gas pump.
  13. The National Climate Assessment, issued by 13 federal agencies, sounded the alarm on the impacts America stands to suffer from climate change, yet went largely ignored by the Trump Administration, which has chosen to side with special interests and industry allies.
  14. 414 investors across the globe—with $31 trillion under management—called for governments to take serious steps to curb climate pollution, citing the “ambition gap” between government commitments and what is needed to sufficiently prevent the world from reaching warming of 2 degrees Celsius above pre-industrial levels.
  15. 2015 saw the adoption of the landmark Paris Agreement, setting nations on a hopeful path toward emissions reduction. Since then, the leadership once shown by America in critical climate talks has been abdicated, left vacant by an administration that chooses to cover its ears and place the world’s children and grandchildren at risk. This year’s climate summit, COP24, saw the creation of a “rule book” to implement the Paris agreement, but also showed that much more needs to be done.
  16. A letter sent by coal baron Robert E. Murray to Vice President Mike Pence listed 16 wishes that the administration has largely taken up as policy. Several among them have led the administration to foolishly attempt to prop up the coal industry despite economic signals diminishing coal’s viability, not to mention its severe health and environmental effects.
  17. After 17 months of countless scandals and reckless attempts to assault bedrock environmental protections, Scott Pruitt resigned his post as EPA Administrator. This list could extend dozens of items longer if we were to count Pruitt’s many offenses. American families and children will not miss him.
  18. A cheery and hopeful note as we head toward the new year: 2018’s midterms saw a wave of pro-environment and climate candidates elected to office across the country. Those candidates-elect—ranging from governors and representatives, to mayors and councilwomen—are leading a charge toward ambitious climate action.

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Also posted in Cars and Pollution, Clean Air Act, Clean Power Plan, Energy, Greenhouse Gas Emissions, Health, Policy, Science / Comments are closed

Seis aportes del nuevo informe sobre el clima

Co-escrito por Ilissa Ocko.

Los efectos tangibles del cambio climático provocado por el hombre son cada vez más visibles. Un estudio reciente, encontró por ejemplo, que la temporada de huracanes 2017 fue más intensa como resultado de nuestro clima cambiante. Limitar los niveles de calentamiento global es esencial para frenar los impactos futuros del cambio climático, pero ¿en qué medida un calentamiento adicional de 0,5 ° C cambia nuestro mundo

El informe especial emitido anoche por el Panel Intergubernamental sobre el Cambio Climático (IPCC), considera los impactos del calentamiento global de 1.5 ° C por encima de los niveles preindustriales, en contraste con los 2 ° C, y cómo puede alcanzarse este objetivo de calentamiento inferior. El informe fue escrito por cientos de científicos provenientes de 40 países diferentes y basado en investigaciones de miles de estudios científicos

Aquí hay 6 puntos clave del nuevo informe del IPCC:

  1. Cuando se trata de calentamiento, 1.5 ° C es mucho más seguro que 2 ° C … pero aún más riesgoso que el presente.

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Also posted in Science, Setting the Facts Straight / Comments are closed

Six takeaways from the new climate report

Co-authored by Ilissa Ocko. Haz click aquí para leer en español.

The tangible effects of human-induced climate change are increasingly visible. A recent study, for example, found that the 2017 hurricane season was more intense as a result of our changing climate. Limiting global warming levels is essential to curbing the future impacts of climate change, but how much does an additional half a degree Celsius warming change our world?

The special report issued last night by the Intergovernmental Panel on Climate Change (IPCC) considers the impacts of 1.5 °C global warming above preindustrial levels, in contrast to 2 °C, and how this lower warming target can be achieved.The report was written by hundreds of scientists hailing from 40 different countries and based on research from thousands of scientific studies.

Here are 6 key takeaways from the new IPCC report:

1. When it comes to warming, 1.5 °C is much safer than 2 °C…but still riskier than the present.

Limiting warming to 1.5 °C compared to 2 °C has clear and considerable benefits, such as significantly reducing the risks of water scarcity, ill-health, food insecurity, flood and drought, extreme heat, tropical cyclones, biodiversity loss, and sea level rise. Read More »

Also posted in Extreme Weather, Greenhouse Gas Emissions, Science, Setting the Facts Straight / Read 2 Responses