Modeling Dust Direct Radiative Feedbacks in East Asia During the Last Glacial Maximum

doi:10.3390/atmos10030146

	Modeling Dust Direct Radiative Feedbacks in East Asia During the Last Glacial Maximum
	Cheng, Xugeng 2; Xie, Xiaoning 1,3; Shi, Zhengguo 1; Li, Xinzhou 1; Zhao, Tianliang 2; Liu, Xiaodong 1
刊名	ATMOSPHERE
	2019-03-18
卷号	10 期号:3 页码:15
关键词	Last Glacial Maximum dust cycle direct radiative forcing
ISSN号	2073-4433
DOI	10.3390/atmos10030146
通讯作者	Xie, Xiaoning(xnxie@ieecas.cn)
英文摘要	In this study, using the fourth version of the Community Atmosphere Model (CAM4) with a bulk aerosol model parameterization (BAM) for dust size distribution (CAM4-BAM), East Asian dust and its direct radiative feedbacks (DRF) during the Last Glacial Maximum are analyzed by intercomparing results between the experiments with (Active) and without (Passive) the DRF. This CAM4-BAM captures the expected characteristics that the dust aerosol optical depth and loading over East Asia during the Last Glacial Maximum (LGM) were significantly greater compared to the current climate. A comparative analysis of the Active and Passive experiments reveals that consideration of the dust-radiation interaction can significantly reduce dust emissions and then weaken the whole dust cycle, including loading, transport, and dry and wet depositions over East Asia. Further analysis of the dust-radiation feedback shows that the DRF decreases surface sensible heat, mainly owing to the negative surface forcing induced by dust with a value of -11.8 W m(-2). The decreased surface sensible heat weakens the turbulent energy within the planetary boundary layer and the surface wind speed, and then reduces the regional dust emissions. This process creates a negative DRF-emission feedback loop to affect the dust cycle during the LGM. Further analysis reveals that the dust emissions in the LGM over East Asia were more reduced, with amounts of -77.2 Tg season(-1) by the negative DRF-emission feedback, compared to the current climate with -6.8 Tg season(-1). The two ratios of this reduction to their emissions are close to -10.7% for the LGM and -7.5% for the current climate.
资助项目	National Key Research and Development Program of China[2016YFA0601904] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA20070103] ; National Natural Science Foundation of China[41690115] ; Key Project of Air Pollution Cause and Control[DQGG0104] ; Program for Postgraduates Research and Innovation in Universities of Jiangsu Province[KYLX15_0863]
WOS关键词	TRANS-PACIFIC TRANSPORT ; SIMULATED CLIMATOLOGY ; REGIONAL CLIMATE ; AEROSOL ; SENSITIVITY ; VARIABILITY ; IMPACT ; EARTH ; DEPOSITION ; EMISSION
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	MDPI
WOS记录号	WOS:000464157200001
资助机构	National Key Research and Development Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; Key Project of Air Pollution Cause and Control ; Program for Postgraduates Research and Innovation in Universities of Jiangsu Province
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/14175]
专题	地球环境研究所_古环境研究室第四纪科学与全球变化卓越创新中心
通讯作者	Xie, Xiaoning
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China 2.Nanjing Univ Informat Sci & Technol, Sch Atmospher Phys, Key Lab Aerosol Cloud Precipitat China Meteorol A, Nanjing 210044, Jiangsu, Peoples R China 3.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Xugeng,Xie, Xiaoning,Shi, Zhengguo,et al. Modeling Dust Direct Radiative Feedbacks in East Asia During the Last Glacial Maximum[J]. ATMOSPHERE,2019,10(3):15.
APA	Cheng, Xugeng,Xie, Xiaoning,Shi, Zhengguo,Li, Xinzhou,Zhao, Tianliang,&Liu, Xiaodong.(2019).Modeling Dust Direct Radiative Feedbacks in East Asia During the Last Glacial Maximum.ATMOSPHERE,10(3),15.
MLA	Cheng, Xugeng,et al."Modeling Dust Direct Radiative Feedbacks in East Asia During the Last Glacial Maximum".ATMOSPHERE 10.3(2019):15.