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Holocene dust deposition in the Ili Basin and its implications for climate variations in Westerlies-dominated Central Asia

文献类型：期刊论文

作者Sun, Huanyu2,3,4; Song, Yougui2,4; Chen, Xiuling1; Cheng, Liangqing2; Liu, Huifang2
刊名PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
出版日期2020-07-15
卷号550页码:13
关键词OSL ages Grain size Color index Loess Tianshan Mountains
ISSN号0031-0182
DOI10.1016/j.palaeo.2020.109731
通讯作者Song, Yougui(ygsong@loess.llqg.ac.cn)
英文摘要Understanding 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.
WOS关键词ARID CENTRAL-ASIA ; LOESS-PALEOSOL SEQUENCE ; GRAIN-SIZE DISTRIBUTION ; LAST GLACIAL PERIOD ; CHINESE LOESS ; MOISTURE EVOLUTION ; LATE QUATERNARY ; SUMMER MONSOON ; NORTH-ATLANTIC ; MAGNETIC-SUSCEPTIBILITY
资助项目Natural 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研究方向Physical Geography ; Geology ; Paleontology
语种英语
WOS记录号WOS:000536187800005
出版者ELSEVIER
资助机构Natural 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
源URL[http://ir.ieecas.cn/handle/361006/14812]  
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.Fujian Normal Univ, Inst Geog, Fuzhou 350007, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
3.Capital Normal Univ, Coll Resource Environm & Tourism, Beijing 100048, Peoples R China
4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
推荐引用方式
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.

入库方式： OAI收割

来源：地球环境研究所

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