Terrestrial mollusk records in the loess sequences from eastern Central Asia since the last deglaciation and their paleoenvironmental significance

doi:10.1016/j.palaeo.2020.109890

	Terrestrial mollusk records in the loess sequences from eastern Central Asia since the last deglaciation and their paleoenvironmental significance
	Zong, Xiulan 2,3; Dong, Jibao 1,3; Cheng, Peng 1,3; Song, Yougui 1,3; Liu, Weiguo 1,3; Li, Yue 2,3; Lan, Jianghu 1,3
刊名	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
	2020-10-15
卷号	556 页码:9
关键词	Westerlies Asia The Ili Basin Holocene Moisture Carbon isotopes
ISSN号	0031-0182
DOI	10.1016/j.palaeo.2020.109890
通讯作者	Dong, Jibao(djb@ieecas.cn)
英文摘要	A variety of proxies has been studied to document paleoclimatic changes in arid Central Asia (ACA). However, biological archives, which can be directly related to climatic conditions, are still scarce in this region. Here we report records of the total count fossils (TCF) of terrestrial mollusks, organic carbon isotopes (delta C-13(org)) and loss on ignition (LOI), since the last deglaciation in the Talede and XRBLK loess sections in Xinjiang, eastern Central Asia. Prior to the Holocene, the records show rare fossils with relatively low LOI and more positive delta C-13(org), indicating low biomass/organic carbon content under dry conditions which were unfavorable for the survival of snails. In contrast, TCF increased abruptly at the beginning of Holocene, coincident with a prominent increase in LOI and a marked negative shift in delta C-13(org). Furthermore, TCF increased gradually to its maximum and delta C-13(org) became progressively negative with constant high LOI from the early to late Holocene. The variations imply a trend towards wetter environment, with optimal moisture (precipitation/relative humidity) conditions occurring in the late Holocene. Overall, this Holocene moisture evolution history could be attributed to the variations of Westerlies strength modulated by the latitudinal temperature gradient and the insolation-related evaporation should also be concerned.
资助项目	National Natural Science Foundation of China[41977385] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB40000000] ; National Key Research and Development Program of China[2016YFA0601902] ; 2nd Tibetan Plateau Scientific Expedition and Research[2019QZKK0101]
WOS关键词	ARID CENTRAL-ASIA ; HOLOCENE MOISTURE EVOLUTION ; CARBON ISOTOPIC COMPOSITION ; WINTER-SPRING PRECIPITATION ; CLIMATE-CHANGE ; VEGETATION CHANGES ; NORTHERN XINJIANG ; ALTAI MOUNTAINS ; ORGANIC-MATTER ; BASIN XINJIANG
WOS研究方向	Physical Geography ; Geology ; Paleontology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000561370700023
资助机构	National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Key Research and Development Program of China ; 2nd Tibetan Plateau Scientific Expedition and Research
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/15206]
专题	地球环境研究所_加速器质谱中心第四纪科学与全球变化卓越创新中心
通讯作者	Dong, Jibao
作者单位	1.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
推荐引用方式 GB/T 7714	Zong, Xiulan,Dong, Jibao,Cheng, Peng,et al. Terrestrial mollusk records in the loess sequences from eastern Central Asia since the last deglaciation and their paleoenvironmental significance[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2020,556:9.
APA	Zong, Xiulan.,Dong, Jibao.,Cheng, Peng.,Song, Yougui.,Liu, Weiguo.,...&Lan, Jianghu.(2020).Terrestrial mollusk records in the loess sequences from eastern Central Asia since the last deglaciation and their paleoenvironmental significance.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,556,9.
MLA	Zong, Xiulan,et al."Terrestrial mollusk records in the loess sequences from eastern Central Asia since the last deglaciation and their paleoenvironmental significance".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 556(2020):9.