September 11, 2009
Michele Rienecker—the head of NASA's Global Modeling and Assimilation Office (GMAO)—knows how challenging it is to predict El Niño.
September 03, 2009
Along with unusually persistent rains, there was a different kind of watery surprise this summer for people on the U.S. Atlantic coast. From the barrier islands of the Southeast to the rocky shores of Maine, tides ran as high as 2 feet above predicted values.
UCAR Magazine
July 16, 2009
By simulating 8,000 years of climate, a team led by scientists from the University of Wisconsin–Madison and NCAR has found a new explanation for the last major period of global warming, which occurred about 14,500 years ago.
Image of Earth showing temperature increases, researched by TraCE-21000 project
June 08, 2009
NCAR researchers are studying whether the eruption of Indonesia’s Mt. Toba supervolcano about 70,000–75,000 years ago may have cooled Earth enough to initiate an ice age and potentially alter the course of human evolution.
A satellite image.
May 27, 2009
Melting of the Greenland ice sheet may drive more water than previously thought toward the already threatened coastlines of New York, Boston, Halifax, and other cities in the northeastern United States and Canada.
Color visualization of globe with North Pole in center
May 11, 2009
One of the challenges for global climate modelers is accurately simulating cloud cover and its changes over time. This is vital for projecting future temperatures, rainfall, and other aspects of global and regional climate change.
Aerial photo of cumulus clouds
April 21, 2009
Rivers in some of the world's most populous regions are losing water, according to a new comprehensive study of global stream flow.
Color world map with bluish colors indicating more streamflow and reddish less
April 14, 2009
The threat of global warming can still be greatly diminished if nations cut emissions of heat-trapping greenhouse gases by 70 percent this century, according to a new analysis.
Global Warming: Cuts in Greenhouse Gas Emissions Would Save Arctic Ice, Reduce S
March 11, 2009
NCAR scientists are working on a bigger, bolder version of WACCM (the Whole Atmosphere Community Climate Model), called WACCM-eXtension, or WACCM-X for short. The enhanced version extends the model to an altitude of about 310 miles.
Coronal mass ejection
January 29, 2009
A team of scientists has successfully flown from the Arctic to the Antarctic this month, the first step in a three-year project to make the most extensive airborne measurements of carbon dioxide and other greenhouse gases to date.
HIAPER aircraft during the HIPPO mission
January 23, 2009
While there has been much attention focused on the question of whether climate change influences hurricanes, scientists are also interested in whether the reverse holds true: do hurricanes significantly impact global climate?
Building damaged by a hurricane
January 14, 2009
New research by NCAR scientists uses atmospheric general circulation model experiments to explore how projected losses in Arctic sea ice may affect climate.
Broken ice in the Arctic Ocean
December 12, 2008
Researchers are working toward predictions of climate change impacts in specific regions and even metropolitan areas. But are local and regional decision makers taking advantage of this science to begin to prepare for the impacts of global warming?
Photograph of Jack Fellows
December 09, 2008
En las próximas décadas serán pocos los países en vías de desarrollo que podrán producir tecnologías más eficientes para reducir emisiones de gases de efecto invernadero, concluye nueva investigación.
Photograph of pinkish gray air over a cityscape
December 09, 2008
Contrary to earlier projections, few developing countries will be able to afford more efficient technologies to reduce greenhouse gas emissions in the next few decades, new research concludes.
Photograph of pinkish gray air over a cityscape
October 08, 2008
NCAR, working with federal agencies and universities as well as the insurance and energy industries, has launched an intensive study to examine how global warming will influence hurricanes in the next few decades.
Color map of North America, Atlantic, and parts of Europe and Africa
September 24, 2008
Research by NCAR scientist Mary Hayden underscores the risk of dengue fever and the growing threat of dengue hemorrhagic fever in the Rio Grande Valley between far south Texas and northeast Mexico.
A mosquito close-up, biting someone's flesh.
September 24, 2008
NCAR scientist Brian O’Neill is building an integrated assessment model to link a range of societal factors, such as future global economic and population trends, with the physical science of climate change.
A dusty dirt road winding through dry fields.
September 24, 2008
NCAR scientists Bill Large and Steve Yeager have produced a new analysis of the exchanges of heat, momentum, and moisture between the oceans and atmosphere that should help climate modelers better assess variability on several time scales.
The sun setting over the ocean.
September 09, 2008
This year is proving unusually active for Atlantic storms. The hurricane season is only at its midpoint, but already there have been 10 named storms—which is the average number for an entire year.
August 12, 2008
Dramatic year-to-year temperature swings and a century-long warming trend across West Antarctica are linked to conditions in the tropical Pacific Ocean, according to a new analysis of ice cores conducted by scientists at NCAR and the University of Washington (UW).
June 19, 2008
The first comprehensive analysis of observed and projected changes in weather and climate extremes in North America and U.S. territories was released today.
Jerry Meehl
June 12, 2008
Scientists are deploying an advanced research aircraft to study a region of the atmosphere that influences climate change by affecting Earth's thermal balance. Findings will be used to improve computer models of global climate.
Photograph of three men in a hangar wroking on equipment  attached to a plane
June 10, 2008
The rate of climate warming over northern Alaska, Canada, and Russia could more than triple during periods of rapid sea ice loss, according to a new study led by NCAR.
Color image of two globes showing sea ice decline in the northern hemisphere
May 27, 2008
The convening lead authors of today's landmark government report on climate change impacts in the United States are available for comment.
Photograph of wheat, close-up

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