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《Journal of Meteorology and Environment》 2017-04
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Characteristics and impact factors of acid rain in Changchun

LI Qian;YANG Xu;MA Liang-chen;ZHANG Jun-ru;SUN Ke-min;XING Li-yuan;Changchun Meteorological Service;Jilin Institute of Meteorological Science;Changchun Meteorological Sounding Center;  
Based on acid rain and related contemporaneous meteorological sounding and air pollution data observed in Changchun during 2012-2015,the annual and seasonal characteristics of acid rain and their responses to meteorological conditions and pollutant concentrations were investigated. The results showthat Changchun city has experienced a transformation from weak to moderate acid rain area during the studied period. The precipitation pH indicates a fluctuant downward trend and is smaller in autumn and winter than that in spring and summer,while K value shows an opposite trend. More specifically,the acid rain is more likely to occur in precipitation for the small magnitude in Changchun city. In addition,the severe acid rain is closely associated with south or west wind and the pH value in precipitation decreases with the increasing temperature difference and thickness of thermal inversion.Besides,a negative correlation between the pH value of rainfall and the SO_2 and NO_2 concentrations of the previous day is very significant,which suggests the pollution of acid rain in Changchun city is to a large extent attributed to SO_2 and NO_2 concentrations.
【Fund】: 吉林省气象局科研课题(2013007)资助
【CateGory Index】: X517
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