Injection Heights of Springtime Biomass Burning Plumes in Southeast Asia
Large-scale biomass burning events recur every spring over the Indochina Peninsula due to land-clearing practices before the local growing season. The pollutants from these biomass burning plumes are sometimes injected directly into the free troposphere, thus efficiently transported over long distances and impacting downwind regions such as southern China. We use the Multi-angle Imaging SpectroRadiometer (MISR) satellite data and the MISR INteractive eXplorer (MINX) software to analyze the biomass burning plume injection heights over the Indochina Peninsula during February to April, 2010. A total of 38 plumes were analyzed, evenly distributed across the burning areas. The plume injection heights range from a few hundred meters up to about 4000 meters. We find that around 40％ of the analyzed plumes were injected above the local mean boundary layer height (1000 m). We use the GEOS-Chem model to simulate the injection and transport of biomass burning plumes to see whether the change in injection height has great impact on tracer concentrations in the Southeast Asia and the downwind regions including southern China. With 40％ of plumes injected in 1-4 km, the concentration of CO changes little compared to the standard emission that all plumes emitted within the boundary layer. However, the change of reactive nitrogen and ozone cannot be ignored.
Biomass burning Southeast Asia Injection height GEOS-Chem
Yue Jian Tzung-May Fu
Department of Atmospheric and Oceanic Sciences,School of Physics,Peking University,Beijing,100871,China
国际会议
西安
英文
701-714
2011-08-17（万方平台首次上网日期，不代表论文的发表时间）