Featured Research

from universities, journals, and other organizations

Shipboard Aerosol Measurements Enhance Climate Models

Date:
December 5, 2001
Source:
University Of Illinois At Urbana-Champaign
Summary:
Sea-level measurements of aerosol properties, obtained last spring under both clean and polluted conditions in the Pacific Ocean, are helping to quantify aerosol optical properties related to climate change.

CHAMPAIGN, Ill. — Sea-level measurements of aerosol properties, obtained last spring under both clean and polluted conditions in the Pacific Ocean, are helping to quantify aerosol optical properties related to climate change. “Recent models and measurements have strong evidence that man-made aerosols exert a significant influence on global climate,” said Mark J. Rood, a professor of civil and environmental engineering at the University of Illinois. “By reducing model uncertainties, aerosol measurements made in key geographic regions are an important contribution to improving climate models.”

Related Articles


For 40 days, Rood’s colleague, postdoctoral research associate Christian Carrico, measured the light-scattering properties of aerosols at three wavelengths of light, two upper particle sizes, and under controlled relative humidity conditions. Sailing first between Hawaii and China, the researchers quantified the optical properties of atmospheric aerosols for clean marine conditions. Then they measured the same properties under polluted conditions along the coast of China.

“Along the coast, we also saw very large concentrations of particulate material, including mineral dust,” Rood said. “We were able to quantify their optical properties as a function of increasing and decreasing controlled relative humidity, which had not been done before.” Aerosol particles have the ability to behave differently under increasing compared to decreasing humidity, Carrico said. “While a dry particle may change to a droplet at 75 to 80 percent relative humidity, it may not change back to a dry particle until the humidity drops to 40 percent. That means there can be a range in relative humidity where you could have either a dry particle or a wet droplet, depending on the history of the aerosol.”

Because a particle’s physical state can significantly change its affect on the atmosphere, it is important to know what that state is. “With the results from these shipboard measurements, we will be able to determine whether particles are wet or dry,” said Rood, who will present the results that have been obtained and interpreted by Carrico and doctoral student Pinar Kus at the American Geophysical Union meeting in San Francisco, Dec. 10-14.

The recent field campaign is part of an extensive set of aerosol characterization experiments that began in 1995. International and interdisciplinary in scope, the program has been supported by the National Science Foundation, National Oceanic and Atmospheric Administration, and National Aeronautics and Space Administration. Rood’s group has taken similar aerosol measurements during previous field campaigns at Cape Grim, Tasmania; Sagres, Portugal; and Bondville, Ill.

The shipboard measurements will be combined with ground-, aircraft-, and satellite-based measurements made by other researchers. “These results can then be used to reduce the uncertainties in global climate models and develop better policies related to air pollution and climate change,” Rood said.


Story Source:

The above story is based on materials provided by University Of Illinois At Urbana-Champaign. Note: Materials may be edited for content and length.


Cite This Page:

University Of Illinois At Urbana-Champaign. "Shipboard Aerosol Measurements Enhance Climate Models." ScienceDaily. ScienceDaily, 5 December 2001. <www.sciencedaily.com/releases/2001/12/011205070406.htm>.
University Of Illinois At Urbana-Champaign. (2001, December 5). Shipboard Aerosol Measurements Enhance Climate Models. ScienceDaily. Retrieved November 26, 2014 from www.sciencedaily.com/releases/2001/12/011205070406.htm
University Of Illinois At Urbana-Champaign. "Shipboard Aerosol Measurements Enhance Climate Models." ScienceDaily. www.sciencedaily.com/releases/2001/12/011205070406.htm (accessed November 26, 2014).

Share This


More From ScienceDaily



More Earth & Climate News

Wednesday, November 26, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Reuters - Innovations Video Online (Nov. 26, 2014) — Innovative recycling project in La Paz separates city waste and converts plastic garbage into school furniture made from 'plastiwood'. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
Blu-Ray Discs Getting Second Run As Solar Panels

Blu-Ray Discs Getting Second Run As Solar Panels

Newsy (Nov. 26, 2014) — Researchers at Northwestern University are repurposing Blu-ray movies for better solar panel technology thanks to the discs' internal structures. Video provided by Newsy
Powered by NewsLook.com
Antarctic Sea Ice Mystery Thickens... Literally

Antarctic Sea Ice Mystery Thickens... Literally

Newsy (Nov. 25, 2014) — Antarctic sea ice isn't only expanding, it's thicker than previously thought, and scientists aren't sure exactly why. Video provided by Newsy
Powered by NewsLook.com
3D Map of Antarctic Sea Ice to Shed Light on Climate Change

3D Map of Antarctic Sea Ice to Shed Light on Climate Change

Reuters - Innovations Video Online (Nov. 24, 2014) — A multinational group of scientists have released the first ever detailed, high-resolution 3-D maps of Antarctic sea ice. Using an underwater robot equipped with sonar, the researchers mapped the underside of a massive area of sea ice to gauge the impact of climate change. Ben Gruber reports. Video provided by Reuters
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