January 21, 2015
The affiliation establishes a long-term collaboration between UCAR's science education center and the Smithsonian.
UCAR named Smithsonian Affiliate: Kids experiment with cloud exhibit
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

Ever notice an earthy smell in the air after a light rain? Now scientists at MIT believe they may have identified the mechanism that releases this aroma, as well as other aerosols, into the environment.

Aerosol generation after drop impingement on porous media is a three-step process, consisting of bubble formation, bubble growth, and bubble bursting.  Image courtesy of Youngsoo Joung

To accurately forecast wintertime bad air days in Utah’s Uintah Basin, researchers must use real atmospheric measurements to estimate chemical emissions from nearby oil and natural gas fields, a new study in Atmospheric Chemistry and Physics has found. 

Smoke from oil refinery
January 13, 2015 | When a team of researchers wanted new insights into why cities tend to be much warmer than surrounding areas, they turned to a specialized and increasingly powerful piece of software that simulates urban environments.
The urban heat island effect can be exacerbated by the smooth surfaces of buildings, such as these in Dallas.
This year, readers focused considerable attention on the unusual midwinter cold across eastern North America and the intense drought in California, but many other topics captured interest as well. To get our stories in your inbox, sign up for email delivery.
By Jenny Varley (IMG_1340) [CC BY-SA 2.0 (http://creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons
January 7, 2015 | A new study in Geophysical Research Letters offers for the first time unequivocal evidence that large storms move significant amounts of ozone from the stratosphere down to the troposphere, the lowest part of the atmosphere. The finding has implications for global climate because tropospheric ozone is a powerful greenhouse gas as well as a pollutant that affects human health and the environment.
Thunderstorms and ozone:  A rotating supercell thunderstorm moves across northeast Colorado.
November 5, 2014 | Concentrations of hydrogen chloride (HCl), the main reservoir of chlorine in the stratosphere, have increased by several percent over much of the Northern Hemisphere since 2007, a new study finds. The observed buildup in HCl is attributed to a temporary shift in atmospheric circulation, rather than to any increased emission of the chlorine-containing, ozone-destroying compounds that are banned by the Montreal Protocol.
Ozone concentrations above the Arctic in March 2011
Matt Kelsch • January 28, 2014 | As this week’s blizzard rumbled toward the U.S. Northeast, many media outlets posted the top-10 snow events for major cities.
Snowfall measurement: cars buried under lots of snow
November 10, 2014 | Old Man Winter seems to have gone maverick in the Northern Hemisphere over the last few years. Take 2014 as an example.
Map of land/ocean temperatures, departures from average, Feb 2014