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Modeling East Asian Dust and Its RadiativeFeedbacks in CAM4-BAM
Xie,XN(Xie,Xiaoning)1; Liu, XD(Liu, Xiaodong)1,2; Che, HZ(Che,Huizheng)3; Xie,XX(Xie,Xiaoxun)1; Wang,HL(Wang,Hongli)4; Li,JD(Li,Jiandong)5; Shi,ZG(Shi,Zhengguo)1; Liu,YG(Liu,Yangang)6; Xie,Xiaoning
Source PublicationJournal of Geophysical Research: Atmospheres
AbstractEast Asian dust and its radiative feedbacks are analyzed by the use of the fourth version of the Community Atmosphere Model (CAM4) with a bulk aerosol model parameterization (BAM) for the dust size distribution (CAM4‐BAM). Two numerical experiments are conducted and intercompared: one with (Active) and one without (Passive) the radiative effects of dust aerosols. This CAM4‐BAM captures the main spatial distribution of the dust aerosol optical depth (AOD) and the dust surface concentrations over East Asia, with positive correlations with the local observational data on annual and seasonal means. A comparative analysis of the Active and Passive experiments reveals that consideration of the dust‐radiation interaction can significantly reduce dust emissions, loading, transport, and dry and wet depositions over East Asia, which is opposite to the enhanced dust cycle over North Africa. Further analysis of the contrasting dust‐radiation feedbacks between North Africa and East Asia shows that over North Africa, the dust radiative forcing significantly increases the surface temperature and 10 m wind speed, whereas it decreases the surface temperature and the surface wind speeds over East Asia. These contrasting radiative effects, in turn, result in distinct dust cycle changes over these two regions. Mechanistic analysis reveals that the radiative contrasts between East Asia and North Africa are mainly due to the differences in their regional surface albedo, dust vertical distribution, and size distribution.
KeywordThe Cam4-bam Captures The Mainspatial Distribution Of Dust Surfaceconcentrations And Aod Overeast Asia Consideration Of Dust-radiationinteractions Significantly Reduces Thedust Cycle Over East Asia ContrastIng Radiative Effects ResultIn DistInct Changes In The Regionalclimate And Dust Cycles Over East asiaAnd North Africa
Indexed BySCI
Project Number2016YFA0601904 ; 41690115 ; 41572150
Funding OrganizationNationalKey Research and DevelopmentProgram of China ; NationalKey Research and DevelopmentProgram of China ; National Natural ScienceFoundation of China ; National Natural ScienceFoundation of China
Document Type期刊论文
Corresponding AuthorXie,Xiaoning
Affiliation1.SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China
2.College of Earth Sciences, Universityof Chinese Academy of Sciences, Beijing, China
3.Key Laboratory for Atmospheric Chemistry, Institute of AtmosphericComposition, Chinese Academy of Meteorological Sciences, CMA, Beijing, China
4.School of Tourism and HospitalityManagement, Shaanxi Radio and TV University, Xi’an, China
5.LASG, Institute of Atmospheric Physics, Chinese Academyof Sciences, Beijing, China
6.Environmental and Climate Sciences Department, Brookhaven National Laboratory,Upton, NY, USA
Recommended Citation
GB/T 7714
Xie,XN,Liu, XD,Che, HZ,et al. Modeling East Asian Dust and Its RadiativeFeedbacks in CAM4-BAM[J]. Journal of Geophysical Research: Atmospheres,2018,123(2):1079-1096.
APA Xie,XN.,Liu, XD.,Che, HZ.,Xie,XX.,Wang,HL.,...&Xie,Xiaoning.(2018).Modeling East Asian Dust and Its RadiativeFeedbacks in CAM4-BAM.Journal of Geophysical Research: Atmospheres,123(2),1079-1096.
MLA Xie,XN,et al."Modeling East Asian Dust and Its RadiativeFeedbacks in CAM4-BAM".Journal of Geophysical Research: Atmospheres 123.2(2018):1079-1096.
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