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引用本文:姚波,刘兴起,王永波,杨波.可可西里库赛湖KS-2006孔矿物组成揭示的青藏高原北部晚全新世气候变迁.湖泊科学,2011,23(6):903-909. DOI:10.18307/2011.0612
YAO Bo,LIU Xingqi,WANG Yongbo,YANG Bo.Late Holocene climatic changes revealed by mineralogical records from lacustrine core KS-2006 from Lake Kusai in the Hoh Xil area, northern Tibetan Plateau. J. Lake Sci.2011,23(6):903-909. DOI:10.18307/2011.0612
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可可西里库赛湖KS-2006孔矿物组成揭示的青藏高原北部晚全新世气候变迁
姚波1,2, 刘兴起1, 王永波3, 杨波4
1.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008;2.中国科学院研究生院, 北京 100049;3.Alfred Wegener Institute for Polar and Marine Research, Research Unit Potsdam, Potsdam 14473;4.中国科学院青海盐湖研究所, 西宁 810008
摘要:
通过对可可西里库赛湖KS-2006孔矿物组合的分析表明:库赛湖沉积的碳酸盐为以文石为主的自生碳酸盐, 其含量的高低能够指示温度的变化;盐类矿物只是在2150 cal aBP以来才出现, 表明湖水盐度增高, 与此同时, 石英含量的持续增高可能同冷干气候条件下该区风成活动的加强有关.青藏高原北部晚全新世的气候环境演化过程为:3770-2550 cal aBP期间气候条件整体较为温暖;2550-2150 cal aBP期间, 气温缓慢下降有变冷的趋势;约2150 cal aBP至今, 气候迅速转冷, 湖区湿度降低, 湖水盐度增高, 风成活动加强, 但900-700 cal aBP期间, 为明显的温暖时期。
关键词:  青藏高原北部  可可西里  库赛湖  矿物组合  晚全新世  气候演化
DOI:10.18307/2011.0612
分类号:
基金项目:全球变化研究国家重大科学研究计划项目(2010CB950101);中国科学院战略性先导科技专项项目(XDA05080403)联合资助
Late Holocene climatic changes revealed by mineralogical records from lacustrine core KS-2006 from Lake Kusai in the Hoh Xil area, northern Tibetan Plateau
YAO Bo1,2, LIU Xingqi1, WANG Yongbo3, YANG Bo4
1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China;2.Graduate University of Chinese Academy of Sciences, Beijing 100049, P.R.China;3.Alfred Wegener Institute for Polar and Marine Research, Research Unit Potsdam, Potsdam 14473, Germany;4.Qinghai Institude of Salt Lakes, Chinese Academy of Sciences, Xining 810008, P.R.China
Abstract:
The analyses of mineral assemblages of the core KS-2006 from Lake Kusai in the Hoh Xil area indicate that the carbon-ates in the sediments of Lake Kusai are mostly authigenic and mainly composed of aragonite.The variation of aragonite content probably reflects the temperature of lake water.Salt minerals were found since 2150 cal aBP, which is an indicative of the increase of salinity of lake water.Meanwhile, the increase of quartz content may be related to the enhancement of wind activity which is caused by the cold-dry climate in this area.The process of climatic and environmental evolutions of late Holocene in this area could be divided into 3 stages as follows:the climate was generally warm between 3770 cal aBP and 2550 cal aBP, then the temperature dropped slowly during 2550-2150 cal aBP;from 2150 cal aBP to present, the climate became cold and dry characterized by low temperature and high salinity of lake water, and strengthening of wind activity;however, there is a distinctly warm period occurred during 900-700 cal aBP.
Key words:  Northern Tibetan Plateau  Hoh Xil area  Lake Kusai  mineral assemblage  late Holocene  climatic evolution
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