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Holocene dust deposition in the Ili Basin and its implications for climate variations in Westerlies-dominated Central Asia
Sun, Huanyu1,2,3; Song, Yougui1,2; Chen, Xiuling4; Cheng, Liangqing1; Liu, Huifang1
Corresponding AuthorSong, Yougui(ygsong@loess.llqg.ac.cn)
2020-07-15
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
Volume550Pages:13
AbstractUnderstanding Holocene paleoclimate in arid Central Asia (ACA) is helpful for predicting future climate. However, Holocene climate patterns and their forcing mechanisms across ACA are vigorously debated in the context of global climate change. Here, we present a Holocene loess profile (SGX) from the Ili Basin in the Westerlies-dominated Central Asia. Based on high-resolution, medium-grained (38-63 mu m) quartz optically stimulated luminescence (OSL) dating, and grain size and color measurements, we reconstruct the Holocene paleoclimate. OSL geochronology indicate that this SGX loess profile covers the last 11.5 ka, and grain size analyses reveal that the sediments are sandy loess, and the environmentally sensitive fractions are < 35.6 mu m and 35.6-252 mu m which represent suspensions after dust storms and proximal deposit components transported mainly during dust storms, respectively. And the redness and yellowness in the loess profile are closely related to the concentrations of hematite (Hm) and goethite (Gt); the ratio Hm/Gt also can be used to reflect the evolution of dry/humid conditions in Central Asian loess. The Holocene Westerlies-dominated climate in ACA is characterized by a dry early Holocene, persistently wet conditions in the middle and late Holocene, and a climatic optimum in the late Holocene. The winter solar insolation at 60 degrees N is considered the major forcing of Holocene climate evolution in ACA.
KeywordOSL ages Grain size Color index Loess Tianshan Mountains
DOI10.1016/j.palaeo.2020.109731
WOS KeywordARID CENTRAL-ASIA ; LOESS-PALEOSOL SEQUENCE ; GRAIN-SIZE DISTRIBUTION ; LAST GLACIAL PERIOD ; CHINESE LOESS ; MOISTURE EVOLUTION ; LATE QUATERNARY ; SUMMER MONSOON ; NORTH-ATLANTIC ; MAGNETIC-SUSCEPTIBILITY
Indexed BySCI ; SCI
Language英语
Funding ProjectNatural Science Foundation of China[41977385] ; National Key Research and Development Program of China[2016YFA0601902] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB26000000] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB40000000] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program[2019QZKK0101]
WOS Research AreaPhysical Geography ; Geology ; Paleontology
Funding OrganizationNatural Science Foundation of China ; National Key Research and Development Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS IDWOS:000536187800005
PublisherELSEVIER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/14813
Collection古环境研究室
第四纪科学与全球变化卓越创新中心
Corresponding AuthorSong, Yougui
Affiliation1.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.Capital Normal Univ, Coll Resource Environm & Tourism, Beijing 100048, Peoples R China
4.Fujian Normal Univ, Inst Geog, Fuzhou 350007, Peoples R China
Recommended Citation
GB/T 7714
Sun, Huanyu,Song, Yougui,Chen, Xiuling,et al. Holocene dust deposition in the Ili Basin and its implications for climate variations in Westerlies-dominated Central Asia[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2020,550:13.
APA Sun, Huanyu,Song, Yougui,Chen, Xiuling,Cheng, Liangqing,&Liu, Huifang.(2020).Holocene dust deposition in the Ili Basin and its implications for climate variations in Westerlies-dominated Central Asia.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,550,13.
MLA Sun, Huanyu,et al."Holocene dust deposition in the Ili Basin and its implications for climate variations in Westerlies-dominated Central Asia".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 550(2020):13.
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