Leipzig 2002 – wissenschaftliches Programm
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UP: Umweltphysik
UP 16: Datenauswertung und Modellierung (Atmosphäre) II
UP 16.1: Vortrag
Dienstag, 19. März 2002, 16:30–16:45, HS 16
Characterization of Pollution Outflow from India and Arabia: Biomass Burning and Fossil Fuel Combustion — •Armin Wisthaler1, Armin Hansel1, Jeffrey W. Stehr2, Russell R. Dickerson2, Sergio A. Guazzotti3, Keith Coffee3, and Kimberly A. Prather3 — 1Institut für Ionenphysik, Universität Innsbruck — 2Department of Meteorology, University of Maryland — 3Department of Chemistry, University of California-Riverside, now San Diego
One objective of the Indian Ocean Experiment (INDOEX 1999) was to characterize the chemical composition of pollution outflow from South Asia. Real-time single particle analysis (ATOFMS, Univ. of California-Riverside), CO analysis (Nondispersive Infrared Gas Filter Correlation Photometer, Univ. of Maryland) and fast-response VOC measurements (PTR-MS, Univ. of Innsbruck) measurements were performed onboard the NOAA R/V Ronald H. Brown. Gas phase and aerosol chemical composition of encountered air parcels changed according to their geographic origin traced by backtrajectory analysis (continental air from Arabia and India; maritime air). The relative strength of combustion related pollution sources (biomass burning (BB) vs. fossil fuel (FF) combustion) was determined from the relative abundance of different tracers: acetonitrile (BB), CO (BB and FF), submicron particles containing carbon but no potassium (FF), submicron particles containing carbon and potassium (BB and coal combustion), submicron particles containing carbon, potassium and lithium (coal combustion). Arabian air clearly reflected the signature of fossil fuel combustion, air from the Indian subcontinent was strongly influenced by biomass burning.