Impacts of biomass burning in Southeast Asia on ozone and reactive nitrogen over the western Pacific in spring

作者：Y. Kondo, Yu Morino, N. Takegawa, M. Koike, Kazuyuki Kita, Yuzo Miyazaki, G. W. Sachse, S. A. Vay, M. A. Avery, F. Flocke, A. J. Weinheimer, F. L. Eisele, Mark A. Zondlo, Rodney J. Weber, H. B. Singh, G. Chen, J. H. Crawford, D. R. Blake, Henry E. Fuelberg, A. D. Clarke, R. W. Talbot, S. T. Sandholm, E. V. Browell, David G. Streets, Ben Liley · 发表于：Journal of Geophysical Research Atmospheres · 年份：2004 · DOI：10.1029/2003jd004203 · 被引用次数：95 · 研究领域：Atmospheric chemistry and aerosols、Atmospheric Ozone and Climate、Air Quality and Health Impacts

Aircraft measurements of ozone (O 3 ) and its precursors (reactive nitrogen, CO, nonmethane hydrocarbons) were made over the western Pacific during the Transport and Chemical Evolution Over the Pacific (TRACE‐P) campaign, which was conducted during February–April 2001. Biomass burning activity was high over Southeast Asia (SEA) during this period (dry season), and convective activity over SEA frequently transported air from the boundary layer to the free troposphere, followed by eastward transport to the sampling region over the western Pacific south of 30°N. This data set allows for systematic investigations of the chemical and physical processes in the outflow from SEA. Methyl chloride (CH 3 Cl) and CO are chosen as primary and secondary tracers, respectively, to gauge the degree of the impact of emissions of trace species from biomass burning. Biomass burning is found to be a major source of reactive nitrogen (NO x , PAN, HNO 3 , and nitrate) and O 3 in this region from correlations of these species with the tracers. Changes in the abundance of reactive nitrogen during upward transport are quantified from the altitude change of the slopes of the correlations of these species with CO. NO x decreased with altitude due to its oxidation to HNO 3 . On the other hand, PAN was conserved during transport from the lower to the middle troposphere, consistent with its low water solubility and chemical stability at low temperatures. Large losses of HNO 3 and nitrate, which are highly ...