HR: 16:50h
AN: A24A-03    [Abstracts]
TI: Intercontinental Transport of Aerosols: Implication for Regional Air Quality
AU: * Chin, M
EM: mian.chin@nasa.gov
AF: NASA Goddard Space Flight Center, NASA GSFC, Code 613.3, Greenbelt, MD 20771, United States
AU: Diehl, T
EM: thomas.diehl@gsfc.nasa.gov
AF: University of Maryland at Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, United States
AU: Ginoux, P
EM: paul.ginoux@noaa.gov
AF: NOAA GFDL, 201 Forrestal Road, Princeton, NJ 08540, United States
AU: Yu, H
EM: hyu@climate.gsfc.nasa.gov
AF: University of Maryland at Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, United States
AB: Aerosol particles, also known as PM2.5 (particle diameter less than 2.5 μm) and PM10 (particle diameter less than 10 μm), is one of the key atmospheric components that determine ambient air quality. Current US air quality standards for PM10 and PM2.5 are 50 μg/m³ and 15 μg/m³, respectively. While local and regional emission sources are the main cause of air pollution problems, aerosols can be transported on a hemispheric or global scale. In this study, we use the Goddard Chemistry Aerosol Radiation and Transport (GOCART) model to quantify contributions of long-range transport vs. local/regional pollution sources and from natural vs. anthropogenic sources to PM concentrations different regions. In particular, we estimate the hemispheric impact of anthropogenic sulfate aerosols and dust from major source areas on other regions in the world. The GOCART model results are compared with satellite remote sensing and ground-based network measurements of aerosol optical depth and concentrations.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Joint Assembly