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Title: Pollution events observed during CARIBIC flights in the upper troposphere between South China and the Philippines
Authors: Lai, S. C.Baker, A. K.Schuck, T. J.van Velthoven, P.Oram, D. E.Zahn, A.Hermann, M.Weigelt, A.Slemr, F.Brenninkmeijer, C. A. M.Ziereis, H.
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Issue Date: 2010
Published in: Atmospheric Chemistry and Physics, Volume 10, Issue 4, Page 1649-1660
Publisher: München : European Geopyhsical Union
Abstract: A strong pollution episode in the upper troposphere between South China and the Philippines was observed during CARIBIC flights in April 2007. Five pollution events were observed, where enhancements in aerosol and trace gas concentrations including CO, CO2, CH4, non-methane hydrocarbons (NMHCs) and halocarbons were observed along the flight tracks during four sequential flights. The importance of the contribution of biomass/biofuel burning was investigated using chemical tracers, emission factor analysis, back-trajectory analysis and satellite images. The Indochinese peninsula was identified as the probable source region of biomass/biofuel burning. However, enhancements in the urban/industrial tracer C2Cl4 during the events also indicate a substantial contribution from urban anthropogenic emissions. An estimation of the contribution of fossil fuel versus biomass/biofuel to the CO enhancement was made, indicating a biomass/biofuel burning contribution of ~54 to ~92% of the observed CO enhancements. Biomass/biofuel burning was found to be the most important source category during the sampling period.
Keywords: aerosol; anthropogenic source; atmospheric pollution; biofuel; biomass burning; carbon dioxide; carbon monoxide; emission; fossil fuel; halocarbon; methane; pollutant source; trace gas; troposphere
DDC: 550
License: CC BY 3.0 Unported
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