Impact of Spatio- temporal Variation of Precipitation on Severe Acid Rain in Southern China
Received date: 2008-02-15
Revised date: 2008-05-21
Online published: 2008-09-25
Supported by
National Special Basic Research Fund, No.2005DKA31700-06-20; Climate change special fund from China Meteorological Administration, No.CCSF2006-32
In this paper, we present the effects of regional precipitation trend change on the frequency, area and intensity of severe acid rain over southern China, where the significant abrupt change in seasonal precipitation has occurred since the 1990s, and based on SO2 and NO2 slant column data retrieved from both SCIAMACHY and GOME, the spatio-temporal distribution characteristics of SO2 and NO2 density are analyzed, too. The results indicate: (1) The emission levels of SO2 and NO2 have reached or passed precipitation scavenging capacity in parts of southern China due to SO2 and NOx total emission amount durative increasing from 1993 to 2004, especially in the region south of the middle and lower Yangtze River. (2) The changes of the severe acid rain city proportion mainly occurred in the region with severe acid rain south of the Yangtze River during 1993 to 2004. With the occurrence of abrupt change in 1999, the severe acid rain mainly moved westwards from 1993 to 1999, and moved eastwards due to the proportion increased in the region with severe acid rain south of the Yangtze River during 2000 to 2004. (3) It is found that the spatial distribution and variation of seasonal precipitation change rate over 10 mm/10a are in a good agreement with those of severe acid over southern China. There occurred a same abrupt period in 1999 for the variation of severe acid rain city proportion and the variation of seasonal precipitation in winter and summer over southern severe acid rain.
XIE Zhiqing1, DU Yin2, ZENG Yan1, 3, LI Yachun1, WU Jingang1, JIAO Shengming1 . Impact of Spatio- temporal Variation of Precipitation on Severe Acid Rain in Southern China[J]. Acta Geographica Sinica, 2008 , 63(9) : 913 -923 . DOI: 10.11821/xb200809002
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