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| ����HYSPLIT4.8܉�Eģʽ��2011��6��~2012��5��NCEP�����ٷ����Y��Ӌ��ÿ�յ��_�A�|ɭ�ּ���ɽ�����^(q��)��ĺ������܉�E���M�о��̽ӑԓ�^(q��)��Ĵ����Ⱦ���ݔ����. ͬ�r�Y�χ��Ҵ�ⱳ���O(ji��n)�y��������ɽվͬ�ڴ����Ⱦ��O(ji��n)�y��(sh��)��(j��),���Mһ��������ͬ��F����Ⱦ����������Ⱦ��F����Ҫ��Դ. �Y������,����65%��܉�Eݔ����Ⱦ��K����Ҫ�����҇��|������Ⱦؓ�Ʌ^(q��),�� ����ʡ�Լ�������ɳĮ�^(q��)�ĸ߿�,����35%�ĺ����Ԛ�F��վ�c��Ⱦ����������ã��Ҹ���F�ڸ�����(ji��)����Ⱦ���ȵ�ؕ�I��һ���,��SO2�^�ߝ����Ҫ�ܱ������ж�����ů��ȼúӰ�,��CO�^�ߝ����Ҫ�ܰ���ʡú̿���a(ch��n)�����M�^���е���Ⱦ���ŷ�Ӱ푣�NOx,�� O3,�� PM10��PM2.5�^�ߝ����Ҫ���҇��|������Ⱦؓ�Ʌ^(q��)Ӱ�. |
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| Transport characteristics of air pollutants transported to the background atmosphere of East China were investigated using HYSPLIT (Hybrid Single Particle Lagrangian Integrated Trajectory) 4.8 model driven by NCEP reanalysis data during June 2011 to May 2012. Based on the air pollutants monitoring data collected at the National atmospheric background monitoring station (Wuyishan station) in Fujian Province, characteristics of different clustered air masses as well as the origins of highly polluted air masses were further examined. The results showed that 65% of all the trajectories, in which air masses mainly passed over highly polluted area of East China, Jiangxi province and upper air in desert areas of Northwest China, carried polluted air to the station, while the rest of trajectories (35%) with air masses originated from ocean could effectively remove air pollutants at the Wuyishan station. However, the impact on the air pollutants for each air mass group varied with seasons. Elevated SO2 concentrations observed at the background station were mainly influenced by coal burning activities in Northern China during heating season. The high CO concentrations were likely associated with the pollutants emission in the process of coal production and consumption in Anhui province. The elevated NOx, O3, PM10 and PM2.5 concentrations were mostly impacted by East China with high levels of air pollutants. |
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