气候变化领域集成服务门户(CCPortal): Atmospheric Dynamics Patterns in Southern Central Asia Since 800 ka Revealed by Loess-Paleosol Sequences in Tajikistan

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DOI	10.1029/2020GL088320
	Atmospheric Dynamics Patterns in Southern Central Asia Since 800 ka Revealed by Loess-Paleosol Sequences in Tajikistan
	Lu H.; Jia J.; Yin Q.; Xia D.; Gao F.; Liu H.; Fan Y.; Li Z.; Wang X.; Berger A.; Oimuhammadzoda I.; Gadoev M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	The atmospheric mechanisms responsible for the loess grain-size variations in central Asia are less clear, and an increasing number of studies have found that the coarse-grained component is likely supplied by the surface circulation rather than by the westerlies (westerlies circulation). In this study, we attempt to determine the atmospheric dynamics patterns in the Afghan-Tajik Basin during the past 800 kyr, based on the coarse grain-size fraction of loess, combined with a study of modern dust transport processes. We suggest that the coarse grain-size fraction can be used to indicate the intensity of near-surface winds, while on glacial-interglacial time scales, the variations of loess grain size in Tajikistan are dominated by Northern Hemisphere ice volume via its effect on the strength of the Siberian High. In addition, we suggest that atmospheric greenhouse gases concentration affected the loess grain size during interglacials via their influence on the temperature of southern high latitudes. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Grain size and shape; Greenhouse gases; Sediments; Atmospheric dynamics; Atmospheric greenhouse; Coarse grain size; Grain size variation; High Latitudes; Near-surface winds; Northern Hemispheres; Surface circulation; Atmospheric movements; atmospheric dynamics; glacial-interglacial cycle; grain size; loess; Northern Hemisphere; paleoclimate; paleosol; westerly; Central Asia; Tajikistan
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169774
作者单位	Key Laboratory of West China's Environmental System (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, China; Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; Georges Lemaître Centre for Earth and Climate Research, Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium; College of Geography and Environment Sciences, Zhejiang Normal University, Zhejiang, China; College of Geography and Environment Engineering, Lanzhou City University, Lanzhou, China; Institute of Geology, Earthquake Engineering and Seismology of the Academy of Sciences, Dushanbe, Tajikistan
推荐引用方式 GB/T 7714	Lu H.,Jia J.,Yin Q.,et al. Atmospheric Dynamics Patterns in Southern Central Asia Since 800 ka Revealed by Loess-Paleosol Sequences in Tajikistan[J],2020,47(17).
APA	Lu H..,Jia J..,Yin Q..,Xia D..,Gao F..,...&Gadoev M..(2020).Atmospheric Dynamics Patterns in Southern Central Asia Since 800 ka Revealed by Loess-Paleosol Sequences in Tajikistan.Geophysical Research Letters,47(17).
MLA	Lu H.,et al."Atmospheric Dynamics Patterns in Southern Central Asia Since 800 ka Revealed by Loess-Paleosol Sequences in Tajikistan".Geophysical Research Letters 47.17(2020).