HR: 13:40h
AN: A53H-01    [Abstracts]
TI: Long-Range Transport of Asian Sulfate and Its Effects on the Canadian Sulfate Burden
AU: * van Donkelaar, A
EM: Aaron.van.Donkelaar@dal.ca
AF: Dept of Physics and Atmospheric Science Dalhousie University, 6300 Coburg Road, Halifax, NS B3H1A6, Canada
AU: Martin, R V
EM: rvmartin@fizz.phys.dal.ca
AF: Dept of Physics and Atmospheric Science Dalhousie University, 6300 Coburg Road, Halifax, NS B3H1A6, Canada
AU: Leaitch, R W
EM: richard.leaitch@ec.gc.ca
AF: Science and Technology Branch Environment Canada, 4905 Dufferin Street, Toronto, ON M3H5T4, Canada
AU: Macdonald, A
EM: annemarie.macdonald@ec.gc.ca
AF: Science and Technology Branch Environment Canada, 4905 Dufferin Street, Toronto, ON M3H5T4, Canada
AU: Walker, T W
EM: thomas.walker@dal.ca
AF: Dept of Physics and Atmospheric Science Dalhousie University, 6300 Coburg Road, Halifax, NS B3H1A6, Canada
AU: Krotkov, N A
EM: krotkov@chescat.gsfc.nasa.gov
AF: Goddard Earth Sciences and Technology Center UMBC, Code 613.3 NASA/Goddard Space Flight Center, Greenbelt, MD 20771, United States
AU: Zhang, Q
EM: qz@asrc.cestm.albany.edu
AF: Atmospheric Sciences Research Center University at Albany, State, University of New York, ASRC, CESTM L110 251 Fuller Rd, Albany, NY 12203, United States
AU: Dunlea, E
EM: edward.dunlea@colorado.edu
AF: Cooperative Institute of Research in Environment Sciences and Department of Chemistry and Biochemistry University of Colorado, UCB 216, Boulder, CO 80309-0216, United States
AU: Jimenez, J L
EM: jose.jimenez@colorado.edu
AF: Cooperative Institute of Research in Environment Sciences and Department of Chemistry and Biochemistry University of Colorado, UCB 216, Boulder, CO 80309-0216, United States
AU: Dibb, J E
EM: jack.dibb@unh.edu
AF: Glacier Research Group University of New Hampshire/EOS, Morse Hall 39 College Road, Durham, NH 03824-3525, United States
AB: Anthropogenic sulfur emissions from East Asia have grown significantly in the past decade. Long-range transport of Asian aerosol affects surface air quality and climate in North America. Using a satellite-based approach, we develop a spatially resolved estimate of sulfur dioxide emission growth in East Asia. We assess the effect of these emissions on Canadian air quality in Spring 2006. We use a chemical transport model (GEOS-Chem) to interpret aircraft measurements (DC-8, C130 and Cessna) from the Intercontinental Chemical Transport Experiment Phase B (INTEX-B) and satellite measurements (OMI, MODIS and MISR). The Canadian component of INTEX-B included 33 vertical profiles from a Cessna 207 aircraft equipped with an aerosol mass spectrometer. Measured sulfate plumes in the free troposphere over British Columbia exceeded 1 ug/m3 and are attributed primarily to Asian sources. Substantial Asian enhancements from organic or nitrate aerosol are not observed. Anthropogenic East Asian sulfur emissions increase mean springtime sulfate in Western Canada at the surface by 0.10-0.15 ug/m3 (20-30%) and account for 40% of the overall regional sulfate burden between 1 and 6 km.
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0478 Pollution: urban, regional and global (0345, 4251)
DE: 1855 Remote sensing (1640)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting