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Direct radiative effects of dust aerosols emitted from the TibetanPlateau on the East Asian summer monsoon – a regional climatemodel simulation
Sun,H(Sun,Hui)1; Liu,XD(Liu,Xiaodong)1,2; Pan,ZT(Pan,Zitao)3,4; Sun,Hui
2017-11
Source PublicationAtmospheric Chemistry and Physics
Volume17Issue:22Pages:13731-13745
Subtype期刊论文
Other AbstractWhile dust aerosols emitted from major Asian sources such as Taklimakan and Gobi deserts have been shown to have strong effect on Asian monsoon and climate, the role of dust emitted from Tibetan Plateau (TP) itself, where aerosols can directly interact with the TP heat pump because of their physical proximity both in location and elevation, has not been examined. This study uses the dust-coupled RegCM4.1 regional climate model (RCM) to simulate the spatiotemporal distribution of dust aerosols originating within the TP and their radiative effects on the East Asian summer monsoon (EASM) during both heavy and light dust years. Two 20-year simulations with and without the dust emission from TP showed that direct radiative cooling in the mid-troposphere induced by the TP locally produced dust aerosols resulted in an overall anticyclonic circulation anomaly in the low troposphere centered over the TP region. The northeasterly anomaly in the EASM region reduces its strength considerably. The simulations found a significant negative correlation between the TP column dust load produced by local emissions and the corresponding anomaly in the EASM index (r = −0.46). The locally generated TP dust can cause surface cooling far downstream in Bohai Gulf and the China–North Korea border area through stationary Rossby wave propagation. Although dust from within TP (mainly Qaidam Basin) is a relatively small portion of total Asian aerosols, its impacts on Asian monsoon and climate seems disproportionately large, likely owning to its higher elevation within TP itself.
DOI10.5194/acp-17-13731-2017
Indexed BySCI
Project Number2016YFA0601904 ; 41405093 ; 41572150 ; 41475085
Language英语
Funding OrganizationNational Key Research and DevelopmentProgram of China ; National Key Research and DevelopmentProgram of China ; National NaturalScience Foundation of China ; National NaturalScience Foundation of China
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5590
Collection古环境研究室
Corresponding AuthorSun,Hui
Affiliation1.SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710061, China
2.CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China
3.Department of Earth and Atmospheric Sciences, Saint Louis University, St. Louis, Missouri, MO 63108, USA
4.Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science andTechnology, Nanjing, Jiangsu, China
Recommended Citation
GB/T 7714
Sun,H(Sun,Hui),Liu,XD(Liu,Xiaodong),Pan,ZT(Pan,Zitao),等. Direct radiative effects of dust aerosols emitted from the TibetanPlateau on the East Asian summer monsoon – a regional climatemodel simulation[J]. Atmospheric Chemistry and Physics,2017,17(22):13731-13745.
APA Sun,H,Liu,XD,Pan,ZT,&Sun,Hui.(2017).Direct radiative effects of dust aerosols emitted from the TibetanPlateau on the East Asian summer monsoon – a regional climatemodel simulation.Atmospheric Chemistry and Physics,17(22),13731-13745.
MLA Sun,H,et al."Direct radiative effects of dust aerosols emitted from the TibetanPlateau on the East Asian summer monsoon – a regional climatemodel simulation".Atmospheric Chemistry and Physics 17.22(2017):13731-13745.
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