Featured Research

from universities, journals, and other organizations

Cloud Chemistry Concocts Aerosols

Date:
February 18, 2008
Source:
American Geophysical Union
Summary:
Aerosols influence global climate by scattering incoming solar radiation, causing a cooling effect. Much of this effect results from organic aerosols, which are classified as "primary" or "secondary." Primary organic aerosols are emitted directly into the atmosphere and are thus relatively easy to monitor. Secondary organic aerosols, those which form from reactions of precursor gases in the atmosphere, are more elusive.

Aerosols influence global climate by scattering incoming solar radiation, causing a cooling effect. Much of this effect results from organic aerosols, which are classified as "primary" or "secondary."

Related Articles


Primary organic aerosols are emitted directly into the atmosphere and are thus relatively easy to monitor. Secondary organic aerosols (SOAs), those which form from reactions of precursor gases in the atmosphere, are more elusive.

Recent research suggested that clouds are able to uptake water-soluble organics, which are then oxidized and form SOAs after cloud droplet evaporation. To better understand the dynamics of SOA formation through this pathway, Ervens et al. study isoprene, a volatile organic compound and a newly recognized source of atmospheric SOA.

Through model studies based on laboratory experiments, the authors find that SOAs form through cloud-processing depend strongly on the initial ratio of isoprene to nitrogen oxides. In this way, combustion emissions (nitrogen oxides) contribute to SOA formation from biogenic hydrocarbons.

Further, cloud-derived SOA concentrations increase with increasing cloud-contact time. The authors expect that such information can help improve climate and air quality models.

Journal reference: Secondary organic aerosol yields from cloud-processing of isoprene oxidation products. Geophysical Research Letters (GRL) paper 10.1029/2007GL031828, 2008; http://dx.doi.org/10.1029/2007GL031828

Authors: Barbara Ervens: Atmospheric Science Department, Colorado State University, Fort Collins, Colorado, U.S.A.; also at Earth System Research Laboratory, U.S. National Oceanic and Atmospheric Administration, Boulder, Colorado, U.S.A.; Annmarie G. Carlton: Atmospheric Sciences Modeling Division, Air Resources Laboratory, U.S. National Oceanic and Atmospheric Administration, Durham, North Carolina, U.S.A.; Barbara J. Turpin: Department of Environmental Sciences, Rutgers University, New Brunswick, New Jersey, U.S.A.; Katye E. Altieri: Institute of Marine and Coastal Sciences, Rutgers University, new Brunswick, New Jersey, U.S.A.; Sonia M. Kreidenweis: Atmospheric Science Department, Colorado State University, Fort Collins, Colorado, U.S.A.; Graham Feingold: Earth System Research Laboratory, U.S. National Oceanic and Atmospheric Administration, Boulder, Colorado, U.S.A.


Story Source:

The above story is based on materials provided by American Geophysical Union. Note: Materials may be edited for content and length.


Cite This Page:

American Geophysical Union. "Cloud Chemistry Concocts Aerosols." ScienceDaily. ScienceDaily, 18 February 2008. <www.sciencedaily.com/releases/2008/02/080213133256.htm>.
American Geophysical Union. (2008, February 18). Cloud Chemistry Concocts Aerosols. ScienceDaily. Retrieved October 24, 2014 from www.sciencedaily.com/releases/2008/02/080213133256.htm
American Geophysical Union. "Cloud Chemistry Concocts Aerosols." ScienceDaily. www.sciencedaily.com/releases/2008/02/080213133256.htm (accessed October 24, 2014).

Share This



More Earth & Climate News

Friday, October 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Dances With Wolves in China's Wild West

Dances With Wolves in China's Wild West

AFP (Oct. 23, 2014) One man is on a mission to boost the population of wolves in China's violence-wracked far west. The animal - symbol of the Uighur minority there - is under threat with a massive human resettlement program in the region. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
San Diego Zoo's White Rhinos Provide Hope for the Critically Endangered Species

San Diego Zoo's White Rhinos Provide Hope for the Critically Endangered Species

Reuters - Light News Video Online (Oct. 22, 2014) The pair of rare white northern rhinos bring hope for their species as only six remain in the world. Elly Park reports. Video provided by Reuters
Powered by NewsLook.com
Trick-or-Treating Banned Because of Polar Bears

Trick-or-Treating Banned Because of Polar Bears

Buzz60 (Oct. 21, 2014) Mother Nature is pulling a trick on the kids of Arviat, Canada. As Mara Montalbano (@maramontalbano) tells us, the effects of global warming caused the town to ban trick-or-treating this Halloween. Video provided by Buzz60
Powered by NewsLook.com
Traditional Farming Methods Gaining Ground in Mali

Traditional Farming Methods Gaining Ground in Mali

AFP (Oct. 20, 2014) He is leading a one man agricultural revolution in Mali - Oumar Diatabe uses traditional farming methods to get the most out of his land and is teaching others across the country how to do the same. Duration: 01:44 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins