南京大学学报（自然科学版）Issue(3)：587-595,9.DOI:10.13232/j.cnki.jnju.2015.03.015
气溶胶直接效应对中国夏季降水影响的数值模拟研究
Numerical study of aerosol direct effect on summer precipitation in China
摘要
Abstract
Aerosol is an important forcing influencing regional climate in East Asia.The interaction between aerosol and monsoon remains large uncertainty.It is necessary to further study the relationship between aerosol and monsoon rainfall.In this paper,two experiments and 5 years run were conducted to investigate the impact of aerosol direct effect on summer precipitation in China using the regional climate model version 4(RegCM4)from ICTP(In-ternational Centre for Theoretical Physics).Observational data including TRMM precipitation MODIS and aerosol optical depth were used to assess the performance of regional climate model in China.Generally,RegCM4 can reproduce the key feature of circulation and precipitation of summer monsoon in China.Our results show that,due to aerosol direct effect,troposphere temperature and meridional wind decreased.The updraft located between 20°N and 30°N and downdraft located on the north of 35°N were both intensified.There was a cyclonic circulation anomaly in eastern China,and there was about 1 m·s-1 northerly anomaly around 1 10°E.The total precipitation underwent a trend known as the southern flooding and northern drought.In the monsoon region,the convective precipitation decreased by 0.05 mm·d-1 and the non-convective precipitation decreased by 0.07 mm·d-1 .Note that the relative change of non-convective precipitation is larger than the change of the convective precipitation.As for the diurnal change of the precipitation,the reduction of precipitation occurred mainly during the night.关键词
中国/气溶胶/直接效应/降水Key words
China/aerosol/direct effect/precipitation分类
天文与地球科学引用本文复制引用
吴明轩,王体健,李树,庄炳亮,谢旻..气溶胶直接效应对中国夏季降水影响的数值模拟研究[J].南京大学学报（自然科学版）,2015,(3):587-595,9.基金项目
受国家重点基础研究发展计划(2011CB403406,2014CB441203),欧盟 FP7项目 REQUA (PIRSES - GA -2013-612671),公益性(气象)行业专项(GYHY201206011) （2011CB403406,2014CB441203）
