干旱区生态环境知识资源中心(Arid): Atmospheric Dynamics Patterns in Southern Central Asia Since 800 ka Revealed by Loess-Paleosol Sequences in Tajikistan

Arid

DOI	10.1029/2020GL088320
	Atmospheric Dynamics Patterns in Southern Central Asia Since 800 ka Revealed by Loess-Paleosol Sequences in Tajikistan
	Lu, Hao; Jia, Jia; Yin, Qiuzhen; Xia, Dunsheng; Gao, Fuyuan; Liu, Hao; Fan, Yijiao; Li, Zaijun; Wang, Xin; Berger, Andre; Oimuhammadzoda, Ilhomjon; Gadoev, Mustafo
通讯作者	Lu, H ; Xia, DS
来源期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2020
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. Plain Language Summary Arid central Asia (ACA) is an important area of eolian dust emission and deposition. The Tajikistan loess sequences arc the oldest loess deposits found so far in central Asia and are an important archive of information about the development of climate and atmospheric circulation in central Asia. However, the implications of grain-size variations of the central Asian loess for climate change and atmospheric dust transport are controversial. Based on the coarse (>25 mu m) grain-size fraction of loess, combined with a study of modern dust transport, we find that the variations of the grain size of the Tajikistan loess on glacial-interglacial time scales were dominated by changes in Northern Hemisphere ice volume (NIIIV) during the last 800 kyr. However, atmospheric greenhouse gases (GIIGs) concentrations may affect the loess grain size during interglacials via their influence on the temperature of southern high latitudes, which may help us understand dust activity against the background of global warming.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000572406100019
WOS关键词	ARID CENTRAL-ASIA ; INDIAN-SUMMER MONSOON ; OF-PHASE RELATIONSHIP ; GRAIN-SIZE ; NORTHERN CHINA ; MAGNETIC-SUSCEPTIBILITY ; ANTARCTIC CLIMATE ; ICE-VOLUME ; EAST ; VARIABILITY
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	兰州大学 ; 中国科学院地质与地球物理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326477
作者单位	[Lu, Hao; Xia, Dunsheng; Liu, Hao; Fan, Yijiao; Li, Zaijun; Wang, Xin] Lanzhou Univ, Coll Earth & Environm Sci, Minist Educ, Key Lab West Chinas Environm Syst, Lanzhou, Peoples R China; [Lu, Hao] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing, Peoples R China; [Lu, Hao; Yin, Qiuzhen; Berger, Andre] Catholic Univ Louvain, Georges Lemattre Ctr Earth & Climate Res, Earth & Life Inst, Louvain La Neuve, Belgium; [Jia, Jia] Zhejiang Normal Univ, Coll Geog & Environm Sci, Hangzhou, Zhejiang, Peoples R China; [Gao, Fuyuan] Lanzhou City Univ, Coll Geog & Environm Engn, Lanzhou, Peoples R China; [Oimuhammadzoda, Ilhomjon; Gadoev, Mustafo] Earthquake Engn & Seismol Acad Sci, Inst Geol, Dushanbe, Tajikistan
推荐引用方式 GB/T 7714	Lu, Hao,Jia, Jia,Yin, Qiuzhen,et al. Atmospheric Dynamics Patterns in Southern Central Asia Since 800 ka Revealed by Loess-Paleosol Sequences in Tajikistan[J]. 兰州大学, 中国科学院地质与地球物理研究所,2020,47(17).
APA	Lu, Hao.,Jia, Jia.,Yin, Qiuzhen.,Xia, Dunsheng.,Gao, Fuyuan.,...&Gadoev, Mustafo.(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, Hao,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).