April 20, 2015
A new study estimates how much carbon dioxide is likely to be absorbed by plants by the end of the century.
Predicting plant uptake of carbon: photo of trees and ferns in Costa Rica
March 31, 2015
NCAR is taking part in a major international project to study how climate change will affect tropical rainforests around the world.
Climate and tropical forests: photo of tropical rainforest
January 13, 2015
Researchers are using specialized modeling techniques have learned how turbulence keeps the countryside cooler than urban areas on summer days.
The urban heat island effect can be exacerbated by the smooth surfaces of buildings, such as these in Dallas.
January 07, 2015
Scientists find unequivocal evidence that thunderstorms move ozone from the stratosphere down toward Earth's surface, affecting air quality and climate.
Thunderstorms and ozone:  A rotating supercell thunderstorm moves across northeast Colorado.
December 30, 2014
A new study led by NASA and NCAR shows that tropical forests may be absorbing far more human-emitted carbon dioxide than many scientists thought.
tropical rain forests and CO2: Serra do Mar Paranaense, Brazil
December 22, 2014
A piece of coral in a University of Arizona lab has revealed a link between Pacific trade winds and shifts in 20th century climate.
Sailboat in calm sea near Kiribati
December 04, 2014
New research demonstrates that an increase in greenhouse gas concentrations thousands of years ago was a key factor in causing substantially more rainfall in two major regions of Africa.
Greenhouse gases & past African rain: Photo of Ubari Oasis in southern Libya
December 02, 2014
An introduction to El Niño, La Niña, what we've learned about them — and where research is headed next.
A wall of dust swept across Melbourne, Australia, during the El Nino of 1983
November 07, 2014
There's major disagreement among scientists on exactly what might be causing a tendency toward colder winters over the last few years in places like the central and eastern United States, Europe, and Russia.
Map of land/ocean temperatures, departures from average, Feb 2014
September 08, 2014
If today’s tools for multiyear climate forecasting had been available in the 1990s, they would have revealed that a slowdown in global warming was likely on the way, according to new research.
Decadal prediction: Map showing trends in sea surface temperature
August 13, 2014
For millions of people, El Niño or La Niña indicates whether they’re likely to face unusually warm, cold, wet, or dry conditions over the coming winter. A new modeling study pins down the process that apparently determines why La Niña events often last twice as long as typical El Niño events—a result with major implications for seasonal predictions.
Sea surface temperatures during 2007–08 La Niña
July 30, 2014
Known from their frequent film and TV appearances, the large, charismatic birds are in danger. By 2100, according to a new study, their numbers will have fallen by around 19% and will continue to decline, qualifying the species for endangered status.
Penguins and climate change: emperor penguins and chicks at Snow Hill Island, Antarctica, October 2009
July 25, 2014
The world faces a small but substantially increased risk over the next two decades of a major slowdown in the growth of global yields of corn and wheat because of warming temperatures.
Crops and climate change: Wheat ripens in a California field
June 25, 2014
California will likely experience more large fires in forested areas this century because of rising temperatures and changes in precipitation along with development patterns, new research finds. The blazes could increase some types of fire-generated air pollution by more than half.
Pollution, fires, warming west: A fire burns on Camp Pendleton, California
June 03, 2014
Researchers are finding new ways to work with aspects of climate change that are surprisingly linear, an approach that could help save time and money in future climate research while providing a richer range of information to help guide policy.
Climate simulations for late 21st-century temperature from different scenarios: IPCC AR5, Ch. 12, FAQ 12.1
May 21, 2014
A field project this June and July will study gravity waves, towering atmospheric features little-known to the public. Novel instruments to be deployed for the international DEEPWAVE project, based in New Zealand, will provide an unprecedented view of gravity waves, a major shaper of atmospheric variability at multiple heights.
Effects of gravity waves: Noctilucent clouds over Helsinki, Finland, on July 2, 2012
May 14, 2014
El Niño exerts its global impact through two different atmospheric pathways, one located miles above the other—a finding that may help bolster regional climate prediction.
El Niño’s high-altitude highway: Map showing temperature anomalies during El Niño and La Niña years with sudden stratospheric warmings, 1958-2013
May 07, 2014
Geophysical Research Letters, a leading journal in Earth science, is toasting its 40th anniversary this month with an editor-picked retrospective collection of 40 papers, including several with authors from NCAR.
Photo of NCAR scientist Marika Holland explaining changes in Arctic sea ice extent
May 05, 2014
Americans face the risk of a 70 percent increase in unhealthy summertime ozone events by 2050 because of factors related to climate change.
Hazy skies in Los Angeles as viewed from the Getty Center, 3/18/08
April 10, 2014
Climate change will reduce water availability during dry seasons and increase it during wet seasons around the globe, new research suggests. It also finds there will be large regional variations in water-related impacts.
Water: too much, too little - Image shows effects of major drought on plants across U.S. on June 24, 2011
April 08, 2014
UCAR and the U.N. Foundation have assembled a network of experts who can discuss climate change in communities across the country.
NASA image of Earth from Visible/Infrared Imaging Radiometer Suite (VIIRS), 5/26/12
March 21, 2014
In recent years, spring snow has vanished even more quickly than computer models and climate scientists had expected, posing a research challenge and a potentially serious risk for water supplies.
Early snowmelt risk: Photo of daffodils amid late-winter snow in West Virginia
March 18, 2014
Why seasonal forecasting can’t tell us with certainty what to expect this summer—and why we might soon have a stronger sense of what late 2014 and early 2015 are likely to bring to large parts of the globe.
Damage from California mudslides during 1997–98 El Nino
March 12, 2014
Increased Pacific winds are sending excess heat into the deep ocean and likely playing a role in the current hiatus in global warming.
March 04, 2014
How does the U.S. winter of 2013–14 rank against its predecessors? And was it a harbinger of more cold winters to come for parts of the country, or simply an outlier at a time of largely warming winters?
Plowing snow in New Hampshire: How do cold winters and climate change intersect?

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