Abstract:

The monsoon has obvious influences on biological migration, cultural formation, regional architectural structure, and changes in meteorological elements, but lacks study on the impact of the PBL SO₂. In this paper, we make a study on the temporal and spatial distribution characteristics of the PBL SO₂ in Chinese monsoon region by OMI SO₂ from 2005 to 2014 and OMPS NMSO₂ from 2015 to 2017 in order to identify the influence of monsoon on PBL SO₂ in different regions. Four typical cities were selected to do correlation analysis, and HYSPLIT model was run for backward Trajectory simulation by the corresponding date of daily SO₂ columns are greater than the monthly average in January 2012. The results show that china鈥檚 PBL SO₂ is spatial heterogeneity; the change of winter and summer monsoon has obvious influence on the PBL SO₂, temperature and pressure are the main factors affecting the concentration of the PBL SO₂. Regional meteorological conditions have large differences in the dry and wet deposition, photochemical reaction and wind diffusion of SO₂; the winter airflow has a greater impact on the increase of the SO₂, internal discharge in the Sichuan Basin, and southwesterly airflow which comes from the Indian Peninsula and the Bay of Bengal has a significant effect on the increase of SO₂ in Chongqing. Yinchuan is affected by the airflow that comes from the Mongolian Plateau or the Tianshan Mountains; Tianjin and Hangzhou are influenced by airflow come from the North China Plain or the Mongolian Plateau.

Key words: SO₂ column, Monsoon region, HYSPLIT model, Airflow

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鍏抽敭璇�: SO₂鏌辨祿搴�, 瀛ｉ鍖�, HYSPLIT妯″瀷, 姘旀祦