气候变化领域集成服务门户(CCPortal): Effects of dust-in-snow forcing over the Tibetan Plateau on the East Asian dust cycle during the Last Glacial Maximum

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DOI	10.1016/j.palaeo.2019.109442
	Effects of dust-in-snow forcing over the Tibetan Plateau on the East Asian dust cycle during the Last Glacial Maximum
	Shen J.; Xie X.; Cheng X.; Liu X.
发表日期	2020
ISSN	0031-0182
卷号	542
英文摘要	The improved Community Atmosphere Model version 4 with a Bulk Aerosol Model parameterizations of the dust size distribution (CAM4-BAM) was used to investigate the dust-in-snow radiative forcing (SRF) over the Tibetan Plateau (TP) and its feedbacks on the regional climate and the dust cycle in spring, the season with the strongest dust activity, over East Asia during the Last Glacial Maximum (LGM). Simulated results show that the dust in snow can cause a large positive SRF and significant warming at the TP surface, reaching more than 45 W m−2 and 3–5 °C warming in western TP during the LGM. The SRF increases the East Asian dust emissions, dry deposition and wet deposition by 71.6 Tg (8.1%), 34.5 Tg (7.0%) and 7.9 Tg (16.0%), respectively, in spring during LGM. Further analysis reveals that, the SRF warms the TP surface and enhances the thermal effect of the TP in spring by increasing the surface shortwave radiative forcing, sensible and latent heat fluxes. A mid-upper level anticyclonic circulation anomaly is generated, thus increases the regional westerly wind over the East Asian dust source region, and in turn enhances the dust emission and dust transport over East Asia. In general, SRF over the TP creates a positive feedback loop of enhancing the East Asian dust cycle during LGM. © 2020 Elsevier B.V.
英文关键词	Anticyclone; Climatic warming; Dust flux; Positive feedback; Sensible heat; Westerlies
语种	英语
scopus关键词	anticyclone; climate feedback; climate forcing; dry deposition; dust; flux measurement; global warming; Last Glacial Maximum; radiative forcing; sensible heat flux; snow; westerly; China; Far East; Qinghai-Xizang Plateau
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150602
作者单位	State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Shaanxi Provincial Meteorological Bureau, Xi'an, 710014, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Science Information &Technology, Nanjing, 210044, China
推荐引用方式 GB/T 7714	Shen J.,Xie X.,Cheng X.,et al. Effects of dust-in-snow forcing over the Tibetan Plateau on the East Asian dust cycle during the Last Glacial Maximum[J],2020,542.
APA	Shen J.,Xie X.,Cheng X.,&Liu X..(2020).Effects of dust-in-snow forcing over the Tibetan Plateau on the East Asian dust cycle during the Last Glacial Maximum.Palaeogeography, Palaeoclimatology, Palaeoecology,542.
MLA	Shen J.,et al."Effects of dust-in-snow forcing over the Tibetan Plateau on the East Asian dust cycle during the Last Glacial Maximum".Palaeogeography, Palaeoclimatology, Palaeoecology 542(2020).