東亞地區(qū)人為氣溶膠直接輻射強迫及其氣候效應的數值模擬

doi:10.3969/2012jms.0063

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東亞地區(qū)人為氣溶膠直接輻射強迫及其氣候效應的數值模擬
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                        10.3969/2012jms.0063
                    
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基金項目:國家重點基礎研究發(fā)展計劃(973計劃)項目(2011CB403405);國家自然科學基金資助項目(41075039,41175065);公益性行業(yè)(氣象)科研專項(GYHY200806009);江蘇省青藍工程(2009)

Simulation of direct radiation forcing of anthropogenic aerosols and its climate effects over eastern Asia

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利用耦合化學過程的區(qū)域氣候模式RegCM3,模擬研究3種主要人為排放氣溶膠(硫酸鹽、黑碳、有機碳)對東亞區(qū)域氣候的影響。計算分析近20 a來3種氣溶膠的時空分布、綜合輻射強迫作用及其對地面氣溫和降水的影響。模擬結果表明:3種氣溶膠冬夏季分布有所不同,冬季氣溶膠大值區(qū)主要分布在南方地區(qū),而夏季大值區(qū)北移;氣溶膠短波輻射強迫在大氣層頂和地面均為負值;氣溶膠的加入對東亞地區(qū)地表氣溫有明顯影響,冬季降溫中心位于四川盆地,夏季降溫大值區(qū)位于華北地區(qū)。氣溶膠直接氣候效應使得冬季東亞大部分地區(qū)降水減少,夏季東亞地區(qū)降水與中國南方地區(qū)夏季氣溶膠濃度有較好的相關關系,中國東部雨帶有南移趨勢。

Abstract:

The regional climate model version 3 (RegCM 3) coupled with a chemistry-aerosol model was used to investigate the effect of three main kinds of anthropogenic aerosol(sulfate,black carbon and organic carbon) on regional climate in east Asia.The spatial and temporal distribution of aerosols and their influences on the radiative forcing,surface temperature,and rainfall during recent 20 years were analyzed.The simulation results show that the distribution of the aerosol concentration was different in winter and summer.The high concentration of aerosols was mainly located in south of east Asia in winter,and then it would expand northward.Short wave radiative forcing of the aerosols at both the top of the atmosphere and the ground was negative.Introducing three kinds of aerosol had significant effects on surface temperature in East Asia.The cooling center was located in Sichuan Basin in winter,whereas the greatest decrease in surface temperature was found in north China in summer.The direct climate effect of sulfate,black carbon and organic carbon aerosols leaded to a reduction of winter precipitation in most regions of east Asia.Summer rainfall in east Asia had a significant correlation with summer mean column burden of aerosols in southern China.The rain belt in eastern China would shift southward.

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王瑩,沈新勇,王勇,吉振明,周偉燦.東亞地區(qū)人為氣溶膠直接輻射強迫及其氣候效應的數值模擬.氣象科學,2012,32(5):515-525 WANG Ying, SHEN Xinyong, WANG Yong, JI Zhenming, ZHOU Weican. Simulation of direct radiation forcing of anthropogenic aerosols and its climate effects over eastern Asia. Journal of the Meteorological Sciences,2012,32(5):515-525

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收稿日期:2011-07-25
最后修改日期:2012-01-09
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在線發(fā)布日期: 2012-10-24
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