亞洲地區(qū)人為氣溶膠對(duì)東亞冬季風(fēng)影響的研究

doi:10.3969/2013jms.0047

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亞洲地區(qū)人為氣溶膠對(duì)東亞冬季風(fēng)影響的研究
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                        10.3969/2013jms.0047
                    
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基金項(xiàng)目:國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)項(xiàng)目(2011CB403405);國(guó)家自然科學(xué)基金資助項(xiàng)目(41075039,41175065);江蘇高校優(yōu)勢(shì)學(xué)科建設(shè)工程資助項(xiàng)目PAPD;江蘇高等學(xué)校優(yōu)秀科技創(chuàng)新團(tuán)隊(duì)科研計(jì)劃資助項(xiàng)目

Effects of anthropogenic aerosols over Asia on east Asian winter monsoon

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利用耦合化學(xué)過(guò)程的區(qū)域氣候模式RegCM4.0,研究亞洲地區(qū)硫酸鹽、黑碳和有機(jī)碳3種人為氣溶膠的直接氣候效應(yīng)對(duì)東亞冬季風(fēng)的影響;并運(yùn)用相關(guān)分析與合成分析方法,研究了東亞人為氣溶膠主要分布區(qū)中人為氣溶膠濃度變化對(duì)東亞冬季風(fēng)的影響。結(jié)果表明:人為氣溶膠對(duì)東亞熱帶和副熱帶冬季風(fēng)均起增強(qiáng)作用;人為氣溶膠使得中國(guó)南方東部地區(qū)的冬季降水減少。2000—2007年,秋、冬季東亞人為氣溶膠主要分布區(qū)中,人為氣溶膠總體呈現(xiàn)減少的趨勢(shì),分別導(dǎo)致了東亞冬季風(fēng)建立的推遲和東亞冬季風(fēng)的減弱。相關(guān)分析和合成分析也表明:在東亞人為氣溶膠主要分布區(qū)中的人為氣溶膠柱濃度含量增加,東亞冬季風(fēng)的建立提前并且東亞冬季風(fēng)加強(qiáng),反之亦然。人為氣溶膠引起陸地地表降溫,而對(duì)海洋溫度幾乎沒(méi)有影響,使低層海陸溫差加大,從而導(dǎo)致低層海陸氣壓差加大,東亞冬季風(fēng)的增強(qiáng)可能與此有關(guān)。

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A regional climate model RegCM4.0 coupled with a chemistry module is employed to investigate the effects of three anthropogenic aerosols (sulfate, black carbon and organic carbon) over Asia on east Asian winter monsoon. Moreover the correlation analysis as well as composite analysis are used to analyze the effects of the change of anthropogenic aerosols concentration in the main anthropogenic aerosols distribution area in east Asia on east Asian winter monsoon. The results show that anthropogenic aerosols intensify both east Asian tropical and subtropical winter monsoon. Anthropogenic aerosols lead to the reduction of winter precipitation in the east of South China. Anthropogenic aerosols in the main distribution area of east Asia showed a decreasing trend in autumn and winter from 2000 to 2007, which separately led to the delaying of the establishment and the weakening of east Asian winter monsoon. Correlation analysis as well as composite analysis also show that an increasing trend of anthropogenic aerosols column burden in the main distribution area in east Asia in autumn and winter may make east Asian winter monsoon strengthen and cause its onset in advance, and vice versa. The reasons for the strengthening of east Asian winter monsoon induced by anthropogenic aerosols may be explained as follows: the anthropogenic aerosols induce the decrease of land surface temperature, but almost have no effect on sea surface temperature, so they induce the increase of low-level temperature difference between sea and land and lead to the increase of low-level pressure difference between sea and land.

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黃偉,沈新勇,黃文彥,周順武.亞洲地區(qū)人為氣溶膠對(duì)東亞冬季風(fēng)影響的研究.氣象科學(xué),2013,33(5):500-509 HUANG Wei, SHEN Xinyong, HUANG Wenyan, ZHOU Shunwu. Effects of anthropogenic aerosols over Asia on east Asian winter monsoon. Journal of the Meteorological Sciences,2013,33(5):500-509

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收稿日期:2013-03-22
最后修改日期:2013-05-23
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在線(xiàn)發(fā)布日期: 2013-10-31
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