4.7 Article

Possible contribution of heavy pollution to the decadal change of rainfall over eastern China during the summer monsoon season

期刊

ENVIRONMENTAL RESEARCH LETTERS
卷 8, 期 4, 页码 -

出版社

IOP PUBLISHING LTD
DOI: 10.1088/1748-9326/8/4/044024

关键词

regional climate model; sulfate; rainfall decadal change; eastern China; simulation

资金

  1. Chinese National Key Basic Research Program [2011CB403406]
  2. Priority Academic Program Development of Jiangsu Higher Education Institutions
  3. Special Program for China Meteorology Trade [GYHY201306046]

向作者/读者索取更多资源

A regional climate model (RegCM4.1) is used to conduct two sets of sensitivity experiments. There are 20-year runs in each set of experiments. The experiments in each set include the variation of anthropogenic SO2 emissions during 1989-2008 but exclude natural variations of the atmosphere and sea surface temperature. The model results suggest that the high-speed emission of SO2 and its uneven distribution over eastern China can contribute to the change in May-August rainfall over eastern China between the two decades of 1999-2008 and 1989-1998, especially to the decrease (increase) of rainfall in the Yangtze River valley (Huang-Huai River region). Furthermore, the areas of decreasing (increasing) rainfall correspond to the downward (upward) currents of the anomalous atmospheric circulation, which is caused by the two humps of the difference in sulfate concentration between the two decades.

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