HR: 1340h
AN: GC23A-1295    [Abstracts]
TI: Airborne Measurements of Trace Gases and Aerosols in Northern China: EAST-AIRE IOP 2005
AU: * Li, C
EM: canli@atmos.umd.edu
AF: Department of Atmospheric & Oceanic Science, University of Maryland, College Park, MD 20742 United States
AU: Dickerson, R R
EM: russ@atmos.umd.edu
AF: Department of Atmospheric & Oceanic Science, University of Maryland, College Park, MD 20742 United States
AU: Li, Z
EM: zli@atmos.umd.edu
AF: ESSIC and Department of Atmospheric & Oceanic Science, University of Maryland, College Park, MD 20742 United States
AU: Stehr, J W
EM: stehr@atmos.umd.edu
AF: Department of Atmospheric & Oceanic Science, University of Maryland, College Park, MD 20742 United States
AU: Chen, H
EM: chb@mail.iap.ac.cn
AF: Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029 China
AU: Marufu, L T
EM: Marufu@atmos.umd.edu
AF: Department of Atmospheric & Oceanic Science, University of Maryland, College Park, MD 20742 United States
AB: To characterize the emission, transport and removal of pollutants and aerosols emitted from East Asia, a US-China joint field campaign was conducted from February to April in China under the EAST-AIRE project. Surface and airborne measurements of trace gases and aerosols were made at different locations in northern China. In early April, eight research flights were conducted around Shenyang, an industrialized city with a population of about 6 million, 600 km northeast of Beijing. Parameters measured include SO₂, CO, O₃, aerosol size distribution, aerosol scattering and absorption coefficients. During 4 of the 8 flights, the research aircraft made spirals over two suburban locations (~50 km south and north of the downtown area of Shenyang) to determine the detailed vertical distribution of trace gases and aerosols. Various weather patterns were encountered, allowing an examination of the roles of atmospheric circulation in transporting local pollutants to much larger areas. For example, the flights made ahead of the cold front showed fairly high concentrations of pollutants above the planetary boundary layer, probably lifted by the upward motion associated with the approaching cold fronts. On the other hand, much lower pollutant levels were found for the flights made behind the cold front. Also observed in one cold-sector flight is a level (~3000 m) with enhanced aerosol scattering but almost undetectable SO₂. Back trajectory analysis using NOAA-HYSPLIT model suggests possible dust transport from source regions.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 1630 Impacts of global change (1225)
DE: 1640 Remote sensing (1855)
SC: Global Climate Change [GC]
MN: Fall Meeting 2005