Atmospheric dust dynamics in southern Central Asia: Implications for buildup of Tajikistan loess sediments

doi:10.1016/j.atmosres.2019.06.013

IEECAS OpenIR > 古环境研究室

	Atmospheric dust dynamics in southern Central Asia: Implications for buildup of Tajikistan loess sediments
	Li, Yue 1,2,3; Song, Yougui1,2 ; Kaskaoutis, Dimitris G.4; Chen, Xiuling 5; Mamadjanov, Yunus 6; Tan, Liangcheng1,2
通讯作者	Song, Yougui(syg@ieecas.cn)
	2019-11-15
发表期刊	ATMOSPHERIC RESEARCH
ISSN	0169-8095
卷号	229 页码:74-85
摘要	Loess, as a terrestrial aeolian deposit, forms extensive landforms over several parts of the Central Asia, especially in southern Tajikistan. However, the dust dynamics for the loess formation over this region remain largely unknown. This study uses loess trace elements and meteorological reanalysis data to study the linkages between the atmospheric circulation patterns, aeolian dust transport and deposition and formation of loess sediments with emphasis in southern Tajikistan. Meteorological data indicates that the dust emissions and accumulation over southern Tajikistan maximize during the hot and dry summer season. The foothills in the north Afghanistan are the most likely dust sources, while the Central Asian deserts (e.g. Karakum) may also have a minor contribution. The prevailed near-surface air currents in the southern Central Asia run southward and then eastward when meeting the Hindu Kush Mountains. The dust-plume transport is mostly blocked by the towering Pamirs, and the deposits settle down forming thick and extensive loess sediments. Long-term trends in precipitation, wind speed and surface moisture affect the dust emissions, while there is a strong evidence of linkage between changes in the intensity of the Caspian Sea - Hindu Kush Index (CasHKI) and dust activity in the Afghan-Tajik Basin. It is recommended that the CasHKI modes can determine the dust activity, while precipitation affects most likely the interannual timescales, which have implications for interpretation of palaeoclimatic proxies of loess-paleosol sequences. However, further challenges come from the proper use of CasHKI in paleoclimatology and comprehensive research is needed.
关键词	Aeolian dust Central Asian loess Trace-element geochemistry Atmospheric circulation CasHKI
DOI	10.1016/j.atmosres.2019.06.013
关键词[WOS]	TIBETAN PLATEAU ; CASPIAN SEA ; TIEN-SHAN ; SOUTHWEST ASIA ; SISTAN REGION ; TRANSPORT CHARACTERISTICS ; GEOCHEMICAL COMPOSITION ; CIRCULATION PATTERNS ; PALEOSOL SEQUENCE ; ICE CORE
收录类别	SCI ; SCI
语种	英语
资助项目	National Key Research and Development Program of China[2016YFA0601902] ; Strategic Priority Research Program of Chinese Academy of Sciences (CAS)[XDB26000000] ; Natural Science Foundation of China[41572162] ; CAS Special Exchange Program ; Belt & Road Center for Climate and Environment Studies of IEECAS
WOS研究方向	Meteorology & Atmospheric Sciences
项目资助者	National Key Research and Development Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences (CAS) ; Natural Science Foundation of China ; CAS Special Exchange Program ; Belt & Road Center for Climate and Environment Studies of IEECAS
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000513173900005
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：47[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/12786
专题	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	Song, Yougui
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, 97 Yanxiang Rd, Xian 710061, Peoples R China 2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Natl Observ Athens, Inst Environm Res & Sustainable Dev, Athens 11810, Greece 5.Fujian Normal Univ, Key Lab Humid Subtrop Ecogeog Proc, Minist Educ, Fuzhou 350007, Peoples R China 6.Res Ctr Ecol & Environm Cent Asia Dushanbe, Dushanbe 734063, Tajikistan
推荐引用方式 GB/T 7714	Li, Yue,Song, Yougui,Kaskaoutis, Dimitris G.,et al. Atmospheric dust dynamics in southern Central Asia: Implications for buildup of Tajikistan loess sediments[J]. ATMOSPHERIC RESEARCH,2019,229:74-85.
APA	Li, Yue,Song, Yougui,Kaskaoutis, Dimitris G.,Chen, Xiuling,Mamadjanov, Yunus,&Tan, Liangcheng.(2019).Atmospheric dust dynamics in southern Central Asia: Implications for buildup of Tajikistan loess sediments.ATMOSPHERIC RESEARCH,229,74-85.
MLA	Li, Yue,et al."Atmospheric dust dynamics in southern Central Asia: Implications for buildup of Tajikistan loess sediments".ATMOSPHERIC RESEARCH 229(2019):74-85.