The Holocene history of Lop Nur and its palaeoclimate implications

doi:10.1016/j.quascirev.2016.07.016

CORC > 北京大学 > 城市与环境学院

	The Holocene history of Lop Nur and its palaeoclimate implications
	Liu, Chenglin ; Zhang, Jia-Fu ; Jiao, Pengcheng ; Mischke, Steffen
刊名	QUATERNARY SCIENCE REVIEWS
	2016
关键词	Grain size Pollen and spores Lop Nur Tarim Basin Xinjiang Arid central Asia Holocene ARID CENTRAL-ASIA QINGHAI-TIBETAN PLATEAU TARIM RIVER-BASIN BOSTEN LAKE NW CHINA MOISTURE EVOLUTION EOLIAN ACTIVITY QAIDAM BASIN GRAIN-SIZE SALT-LAKE
DOI	10.1016/j.quascirev.2016.07.016
英文摘要	The Holocene hydrological history of Lop Nur in northwestern China's Tarim Basin and its response to climate conditions are inferred from a relatively well-dated multi-proxy record including grain-size, pollen and spores, and soluble salt data. A dated pit section (YKD0301) with a depth of 570 cm in the center of the dry Lop Nur Basin was investigated. The sediments contain a total of twenty fining-upward cycles as a result of strong discharge from the catchment to the lake during relatively wet conditions. The fluvial sediments were probably widely dispersed by wind-driven waves and currents in the large and shallow basin of Lop Nur. Higher runoff and dilution of lake waters are also indicated by lower contents of soluble salt in the sediments and recorded ostracod shells of brackish and oligohaline to freshwater species. In contrast, sediment sections with smaller mean grain size and fewer flood layers are dominated by aeolian sediments which were accumulated during drier periods. Ostracod shells are mostly lacking from these sections, suggesting a higher salinity in the lake. Lop Nur experienced six stages during the last 9 ka. Relatively wet conditions existed between 9.0-8.9, 8.7-5.1 and 2.4-1.8 ka, with periods of increased aridity in between and after 1.8 ka. The lowest salinity was recorded between 8.7 and 5.1 ka which represents the wettest phase during the last 9 ka and probably the regional Holocene Optimum. Relatively wet climate conditions between 2.4 and 1.8 ka and dry conditions afterwards possibly first fostered and later on caused the devastation of the ancient Loulan Kingdom in the region. The uppermost sediments of the section represent a massive salt crust formed during the final desiccation of the lake in the last century. The effective moisture change pattern of the Lop Nur region is roughly consistent with synthesized Holocene moisture records for western China dominated by the westerlies. (C) 2016 Elsevier Ltd. All rights reserved.; China's NSF projects [40830420, 41471003]; National 305 project of Ministry of Science and Technology of China [2003BA612A-06-15]; German Research Foundation (DFG grant) [Mi 730/16-1]; SCI(E); EI; ARTICLE; jfzhang@pku.edu.cn; 163-175; 148
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/447945]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Liu, Chenglin,Zhang, Jia-Fu,Jiao, Pengcheng,et al. The Holocene history of Lop Nur and its palaeoclimate implications[J]. QUATERNARY SCIENCE REVIEWS,2016.
APA	Liu, Chenglin,Zhang, Jia-Fu,Jiao, Pengcheng,&Mischke, Steffen.(2016).The Holocene history of Lop Nur and its palaeoclimate implications.QUATERNARY SCIENCE REVIEWS.
MLA	Liu, Chenglin,et al."The Holocene history of Lop Nur and its palaeoclimate implications".QUATERNARY SCIENCE REVIEWS (2016).