Agency Science News
Climate Change and Wildfires: What’s the Connection? Print E-mail
What is the connection between climate change and wildfires

Thursday, August 22, 2013

Featured by EPA, a member of the U.S. Global Change Research Program

The rise of wildfire activity in the U.S. is an important scientific and environmental issue - one that that is being amplified by the effects of climate change.

In a study funded by EPA, scientists are modeling projections of wildfire activity fifty years from now. The study takes into account the possible effects of global warming - changing vegetation and less precipitation - in areas already prone to wildfire activity, to determine how future fires may affect air quality.

New Reports Explore How A Shifting Climate May Impact Eight U.S. Regions Print E-mail
President Obama Announces His Climate Action Plan

Tuesday, July 30, 2013

The United States will be a much hotter place, precipitation patterns will shift, and climate extremes will increase by the end of the 21st century, according to reports released in January 2013 by the National Oceanic and Atmospheric Administration (NOAA) in support of the National Climate Assessment (NCA). More recently, the U.S. Global Change Research Program (USGCRP) summarized the January reports into 2-page summaries for each region.

The 2-page summaries outline current changes - and possible future changes - in climate according to region, looking at the Northeast, Southeast, Midwest, Great Plains, Northwest, Southwest, Alaska, and Hawai‘i/Pacific Islands as well as summarizing overall nationwide trends.

EPA’s Science Matters Newsletter Puts Spotlight on Climate Change Print E-mail
EPA's Science Matters Newsletter Puts Spotlight on Climate Change

Friday, July 26, 2013

Featured by EPA, a member of the U.S. Global Change Research Program

Heat waves. Drought. “Super” storms. Flooding. How do we put such events into perspective? And more importantly, how do we take collective action to mitigate and adapt to the increasingly clear evidence that the effects of climate change are unfolding? As the nation did decades ago when faced with threats to its air, water, and land—the first steps toward meeting environmental challenges start with science.

These are the issues addressed in a full edition of Science Matters, a publication put out by the Environmental Protection Agency (EPA). The newsletter explores the impacts of climate change and highlights the foundational role played by science to advance an understanding of the impacts of global change.

This issue of EPA’s Science Matters features stories on how Agency researchers and their partners are helping decision makers, communities, and individuals incorporate the latest science into strategies and actions designed to protect public human health and the environment in the face of a changing climate.

What EPA researchers are learning is bringing a strong scientific foundation to the expanding conversation on climate change. While such change and its effects present some of the greatest environmental challenges the nation—and the world—have faced since the establishment of EPA some 40 years ago, the science and engineering it will take to meet those challenges are well under way.

To read the full newsletter on the EPA website, please click here.

Energy Sector Vulnerable to Climate Change, U.S. Department of Energy Report Says Print E-mail
President Obama Announces His Climate Action Plan

Friday, July 26, 2013

Featured by DOE, a member of the U.S. Global Change Research Program

In his speech at Georgetown University last month, President Obama referred to our nation’s vulnerabilities to climate change, underscoring how Hurricane Sandy and other climate-related disasters serve as wake-up calls.

These extreme weather events as well as changes in temperature and water availability – all related to our changing climate – are disrupting the ways we generate, distribute, and consume energy, according to a new report released by the US Department of Energy.

New NASA Visualizations Show Two Futures of Climate Change Print E-mail

Thursday, July 25, 2013

By Tara Failey

Climate Scenarios Project Temperature and Precipitation in the U.S. through 2100

Curious to ‘see’ how different greenhouse gas emission scenarios are expected to impact the United States? Two recently released animated NASA visualizations developed to support the forthcoming third US National Climate Assessment show projections of Earth’s temperature and precipitation patterns from today through the year 2100—revealing how “low” versus “high” emission scenarios would impact the planet’s climate.

“These visualizations communicate a picture of the impacts of climate change in a way that words do not,” said Allison Leidner, Ph.D., a scientist who coordinates NASA’s involvement in the National Climate Assessment. “When I look at the scenarios for future temperature and precipitation, I really see how dramatically our Nation’s climate could change.”

The NASA Goddard Scientific Visualization Studio (SVS) developed the animations in collaboration with NOAA's National Climatic Data Center, and the Cooperative Institute for Climate and Satellites – North Carolina.

Contrasting Emissions Scenarios

To develop these complex animations, a team of scientists used results from 15 global climate models, combined with data on monthly temperature and precipitation in the United States, to generate maps of projected conditions through the year 2100.

The visualizations present projections of temperature and precipitation changes from 2000 to 2100 - compared to the historical average from 1970-1999 - under two different scenarios of future CO2 emissions. The “higher emissions” scenario represents a fossil-fuel-intensive future in which concentrations of atmospheric CO2 exceed 800 ppm by the year 2100. The “lower emissions” scenario represents a less fossil-fuel-intensive future in which atmospheric CO2 concentrations level off at around 550 ppm by 2100.

Today, atmospheric CO2 concentrations stand at around 400 ppm.

Temperature in the U.S.

While NASA’s visualizations show significant warming in both scenarios, the projected average temperature change over the contiguous United States in the higher emissions scenario is nearly twice what is projected in the lower emissions scenario— at 8°F (versus just 4.5°F).

Dr. Kenneth E. Kunkel, Lead Scientist for Assessments at NOAA’s Cooperative Institute for Climate and Satellites, explained, “Looking at these visualizations, you see that reducing emissions does in fact have a big impact on the amount of warming by the end of the century.”

Another notable characteristic of the visualizations is that projected warming is generally greater over the North American continent, compared to the surrounding oceans. It takes longer for the oceans to warm up because the excess energy that is deposited in the oceans can be mixed over a fairly large depth, says Dr. Kunkel.

Dr. Kunkel also points out that the magnitude of temperature increase during the summer is much higher over the contiguous U.S. than in Canada and Alaska. This may be partially a result of decreasing soil moisture relating to increased evaporation, which increases as temperature rises.

How Will Precipitation Change?

Nationwide, changes in precipitation are expected to occur under both scenarios, but be more dramatic in the higher emissions scenario—with many dry areas getting dryer, while wet areas get wetter.

“The visualizations really bring home how regional variations tie back together,” Dr. Leidner said. “Words describe this, but when you see it, you get it.”

For instance, the visualizations show that New England precipitation projected to increase, while some areas of the Southwest can expect to see a 10% decrease in annual precipitation in the higher emission scenario.

To view the detailed visualizations on the NASA website, please visit the links below:

To view the NASA Visualization Explorer stories on these visualizations, please visit the links below:

The visualizations for iPad are available here:

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