东南亚地区生物体燃烧影响华南地区对流层臭氧垂直分布的个例分析

INFLUENCE OF BIOMASS BURNING IN SOUTHEAST ASIA ON THE LOWER TROPOSPHERIC OZONE DISTRIBUTION OVER SOUTH CHINA

20 0 1年 3月 7日与 8日在香港与昆明用电化学臭氧探空仪探测到了对流层低层异常的高浓度臭氧分布 .本文使用NCEP(美国环境预报中心 )分析资料、中尺度数值模式MM5模拟的大气环流数据、卫星观测的东南亚地区的生物体燃烧状况、气溶胶指数等资料 ,分析了这段时间的天气形势、大气环流、空气的后向轨迹以及生物体燃烧产生的烟尘的轨迹 ,结果发现高浓度的臭氧空气来源于有生物体燃烧的中南半岛地区 .

Ozone enhancement was observed in the lower troposphere over Hong Kong and Kunming on March 7 and 8, 2001 using the electrochemical concentration cell ozonesondes. Based on the data of NCEP, Total Column Ozone, the numerical simulation of MM5, AI from TOMS, aerosol optical depths from MODIS, and CO concentrations from MOPITT, we analyze the influence of the biomass burning in Southeast Asia on the ozone distribution in the lower troposphere over Hong Kong and Kunming. The transport of the emissions of biomass burning shows that the enhancement of ozone in the lower troposphere over Hong Kong and Kunming is from the region where large-scale fires occurred in Southeast Asia. TOMS AI images and the atmospheric background circulations reveal that the biomass burning plumes in Southeast Asia are transported to downwind South China and lead to enhancement of the ozone concentrations in the lower troposphere.mento