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

文献类型：期刊论文

作者Li, Yue1,2,3; Song, Yougui1,2; Kaskaoutis, Dimitris G.4; Chen, Xiuling5; Mamadjanov, Yunus6; Tan, Liangcheng1,2
刊名ATMOSPHERIC RESEARCH
出版日期2019-11-15
卷号229页码:74-85
ISSN号0169-8095
关键词Aeolian dust Central Asian loess Trace-element geochemistry Atmospheric circulation CasHKI
DOI10.1016/j.atmosres.2019.06.013
通讯作者Song, Yougui(syg@ieecas.cn)
英文摘要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.
WOS关键词TIBETAN PLATEAU ; CASPIAN SEA ; TIEN-SHAN ; SOUTHWEST ASIA ; SISTAN REGION ; TRANSPORT CHARACTERISTICS ; GEOCHEMICAL COMPOSITION ; CIRCULATION PATTERNS ; PALEOSOL SEQUENCE ; ICE CORE
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
语种英语
出版者ELSEVIER SCIENCE INC
WOS记录号WOS:000513173900005
资助机构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
源URL[http://ir.ieecas.cn/handle/361006/12785]  
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Song, Yougui
作者单位1.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, 97 Yanxiang Rd, 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.

入库方式： OAI收割

来源：地球环境研究所

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