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《Journal of Tropical Meteorology》 2009-02
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INVESTIGATION INTO THE SOURCE OF AIR POLLUTANTS TO HONG KONG BY USING BACKWARD TRAJECTORY METHOD DURING THE TRACE-P CAMPAIGN

ZHAO Heng,WANG Ti-jian,JIANG Fei,XIE Min (1.Department of Atmospheric Science,Nanjing University,Nanjing 210093,China)  
Using the Hysplit4.7 Model and NCEP reanalysis data for March 2001,the backward trajectories arriving in Hong Kong are calculated and the atmospheric transport characteristics in Hong Kong are discussed in this paper.According to the cluster analysis for trajectories,six categories of air masses are obtained that eventually arrive in Hong Kong.Using the concentration of air pollutants measured at Cape D'Aguilar station during the TRACE-P Campaign,we get different chemical characteristics for different air masses.The results show that 47.5% of the trajectories come from mainland China,34.6% of them from local sources in Hong Kong and 18.7% of them from maritime area.The Cape D'Aguilar station’s average concentrations of O3,SO2 and CO are 31.1,3.0,486.1 μg/m3,respectively,with the effect of continental air masses,20.0,1.0,319.4 μg/m3,respectively,with the effect of maritime air masses,and 20.0,1.2,308.0 μg/m3,respectively,with the effect of local air masses.
【Fund】: 国家863计划(2006AA06A307);; 教育部2006年“新世纪优秀人才计划”共同资助
【CateGory Index】: X51
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