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Aeolian dust dynamics in the Fergana Valley, Central Asia, since similar to 30 ka inferred from loess deposits

文献类型：期刊论文

作者Li, Yue1,2; Song, Yougui1,2; Kaskaoutis, Dimitris G.3,4; Zan, Jinbo5,6; Orozbaev, Rustam7,8; Tan, Liangcheng1,2; Chen, Xiuling9,10
刊名GEOSCIENCE FRONTIERS
出版日期2021-09-01
卷号12期号:5页码:17
ISSN号1674-9871
关键词Dust dynamics Climate Atmospheric patterns Loess Ice volume Fergana Valley
DOI10.1016/j.gsf.2021.101180
通讯作者Song, Yougui(syg@ieecas.cn)
英文摘要Knowledge of the interactions among atmospheric dynamics, dust emissions and climate system is essential to understand the physical mechanisms for the dust lifecycle, their role in loess formation as well as the predictions of future dust concentration. However, these issues still remain relatively poorly known in Central Asia (CA). The extensive loess deposits on the CA pediments provide a promising archive to explore atmospheric dust dynamics and climatic conditions in the past and their association with loess formation. This study investigates the granulometric and magnetic properties of a loess section (named Osh section) in the Fergana Valley, which provides a sensitive record of atmospheric dust dynamics since 30 ka based on radiometric (AMS C-14) dating. The frequency-dependent magnetic susceptibility (chi(fd)) and the mean grain size are used to reconstruct the broad-scale effective moisture and summer atmospheric dynamics pattern in CA, respectively. The results show that the precession forcing exerts a huge influence on the wind-regime variabilities in CA, but with different physical processes under the impact of the Northern Hemisphere ice sheet (NHIS) before and after 15 ka. The origin of the sedimentation rate variations in the Osh loess is also linked to the NHIS-modulated changes of the atmospheric circulation patterns. Either the strengthened westerlies or the increased surface roughness from higher vegetation cover in loess-deposition areas have significantly accelerated the loess accumulation. As a result, these complicated influence factors of sedimentation rate change in the Osh loess section, especially during the Holocene epoch, may hamper accessibility of the authentic dust emission flux and atmospheric dust concentration in CA. (C) 2021 ChinaUniversity of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V.
WOS关键词ATMOSPHERIC CIRCULATION PATTERNS ; ARID CENTRAL-ASIA ; INTERGLACIAL-GLACIAL CYCLE ; GRAIN-SIZE DISTRIBUTIONS ; LATE QUATERNARY LOESS ; CHINESE LOESS ; PALEOSOL SEQUENCE ; MAGNETIC-SUSCEPTIBILITY ; LATE PLEISTOCENE ; NORTH-ATLANTIC
资助项目Strategic Priority Research Programof the Chinese Academy of Sciences (CAS)[XDB40000000] ; Strategic Priority Research Programof the Chinese Academy of Sciences (CAS)[XDB26000000] ; Natural Science Foundation of China[41977385] ; Natural Science Foundation of China[41572162] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program[2019QZKK0101] ; State Key Laboratory of Loess and Quaternary Geology[SKLLQGPY2006] ; project PANhellenic infrastructure for Atmospheric Composition and climatE change PANACEA - Operational Program Competitiveness, Entrepreneurship and Innovation (NSRF 2014-2020)[MIS 5021516] ; European Union
WOS研究方向Geology
语种英语
出版者CHINA UNIV GEOSCIENCES, BEIJING
WOS记录号WOS:000692319300008
资助机构Strategic Priority Research Programof the Chinese Academy of Sciences (CAS) ; Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; State Key Laboratory of Loess and Quaternary Geology ; project PANhellenic infrastructure for Atmospheric Composition and climatE change PANACEA - Operational Program Competitiveness, Entrepreneurship and Innovation (NSRF 2014-2020) ; European Union
源URL[http://ir.ieecas.cn/handle/361006/16978]  
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.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
3.Natl Observ Athens, Inst Environm Res & Sustainable Dev, Athens 11810, Greece
4.Univ Crete, Dept Chem, Environm Chem Proc Lab, Iraklion 71003, Greece
5.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
6.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China
7.Natl Acad Sci Kyrgyz Republ, Inst Geol, Bishkek 720040, Kyrgyzstan
8.Res Ctr Ecol & Environm Cent Asia Bishkek, Bishkek 720040, Kyrgyzstan
9.Fujian Normal Univ, Inst Geog, Fuzhou 350007, Peoples R China
10.Fujian Normal Univ, State Key Lab Subtrop Mt Ecol, Minist Sci & Technol & Fujian Prov, Fuzhou 350007, Peoples R China
推荐引用方式
GB/T 7714		 Li, Yue,Song, Yougui,Kaskaoutis, Dimitris G.,et al. Aeolian dust dynamics in the Fergana Valley, Central Asia, since similar to 30 ka inferred from loess deposits[J]. GEOSCIENCE FRONTIERS,2021,12(5):17.
APA Li, Yue.,Song, Yougui.,Kaskaoutis, Dimitris G..,Zan, Jinbo.,Orozbaev, Rustam.,...&Chen, Xiuling.(2021).Aeolian dust dynamics in the Fergana Valley, Central Asia, since similar to 30 ka inferred from loess deposits.GEOSCIENCE FRONTIERS,12(5),17.
MLA Li, Yue,et al."Aeolian dust dynamics in the Fergana Valley, Central Asia, since similar to 30 ka inferred from loess deposits".GEOSCIENCE FRONTIERS 12.5(2021):17.

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来源：地球环境研究所

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