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Latest James Hansen Stories

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2010-11-23 14:58:17

In the first comprehensive global survey of temperature trends in major lakes, NASA researchers determined Earth's largest lakes have warmed during the past 25 years in response to climate change. Researchers Philipp Schneider and Simon Hook of NASA's Jet Propulsion Laboratory in Pasadena, Calif., used satellite data to measure the surface temperatures of 167 large lakes worldwide. They reported an average warming rate of 0.81 degrees Fahrenheit per decade, with some lakes warming as much as...

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2010-11-23 10:50:27

Current state-of-the-art global climate models predict substantial warming in response to increases in greenhouse gases such as carbon dioxide. The models, though, disagree widely in the magnitude of the warming we can expect. The disagreement among models is mainly due to the different representation of clouds. Some models predict that global mean cloud cover will increase in a warmer climate and the increased reflection of solar radiation will limit the predicted global warming. Other...

2010-11-08 00:00:46

Preeminent climate scientist and noted environmental leaders speak out on behalf of the Kiribati Nation, calling upon world leaders who will gather this month at the Economic Summit in Seoul and U.N. Climate talks in Cancun to address the issue of water scarcity and its impact on food sources. James Hansen, world renowned climate scientist, Lester Brown, Founder and President of Earth Policy Institute, Rabbi Warren Stone, religious environmental activist who served as delegate at the U.N....

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2010-10-02 05:35:00

An unparalleled heat wave in eastern Europe, coupled with intense droughts and fires around Moscow, put Earth's temperatures in the headlines this summer. Likewise, a string of exceptionally warm days in July in the eastern United States strained power grids, forced nursing home evacuations, and slowed transit systems. Both high-profile events reinvigorated questions about humanity's role in climate change. But, from a global perspective, how warm was the summer exactly? How did the summer's...

2010-04-25 19:13:00

WASHINGTON, April 25 /PRNewswire-USNewswire/ -- "Our grandchildren will blame us if we destroy the remarkable planet that we inherited," warned renowned climate scientist James Hansen today at the 40th anniversary celebration of Earth Day on the National Mall in Washington, DC. Dr. Hansen, awaiting the imminent birth of a grandchild (his fourth), is keenly aware of the threat that potential human-made climate chaos poses to her generation and all who will follow. We live in a "false...

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2010-02-04 08:50:00

The fact that glaciers in the Himalayan mountains are thinning is not disputed. However, few researchers have attempted to rigorously examine and quantify the causes. Lawrence Berkeley National Laboratory scientist Surabi Menon set out to isolate the impacts of the most commonly blamed culprit"”greenhouse gases, such as carbon dioxide"”from other particles in the air that may be causing the melting. Menon and her collaborators found that airborne black carbon aerosols, or soot,...

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2010-01-22 07:55:00

2009 One Of The Warmest Years A new analysis of global surface temperatures by NASA scientists finds the past year was tied for the second warmest since 1880. In the Southern Hemisphere, 2009 was the warmest year on record. Although 2008 was the coolest year of the decade because of a strong La Nina that cooled the tropical Pacific Ocean, 2009 saw a return to a near-record global temperatures as the La Nina diminished, according to the new analysis by NASA's Goddard Institute for Space...

2010-01-21 15:03:00

WASHINGTON, Jan. 21 /PRNewswire-USNewswire/ -- A new analysis of global surface temperatures by NASA scientists finds the past year was tied for the second warmest since 1880. In the Southern Hemisphere, 2009 was the warmest year on record. (Logo: http://www.newscom.com/cgi-bin/prnh/20081007/38461LOGO ) Although 2008 was the coolest year of the decade because of a strong La Nina that cooled the tropical Pacific Ocean, 2009 saw a return to a near-record global temperatures as the La...

2010-01-12 08:00:00

AUSTIN, Texas, Jan. 12 /PRNewswire/ -- EarthSky -a clear voice for science heard around the world -- and more than 600 scientists today announced the selection of Neil deGrasse Tyson as the EarthSky Science Communicator of the Year for 2009. Dr. Tyson is an astrophysicist and the Frederick P. Rose Director of the Hayden Planetarium at the American Museum of Natural History in New York. Since 2006, he has served as host of PBS's educational television show NOVA scienceNOW. He has been a...

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2009-12-15 06:45:00

Black soot deposited on Tibetan glaciers has contributed significantly to the retreat of the world's largest non-polar ice masses, according to new research by scientists from NASA and the Chinese Academy of Sciences. Soot absorbs incoming solar radiation and can speed glacial melting when deposited on snow in sufficient quantities. Temperatures on the Tibetan Plateau -- sometimes called Earth's "third pole" -- have warmed by 0.3°C (0.5°F) per decade over the past 30 years, about...