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Late Holocene hydroclimatic variations and possible forcing mechanisms over the eastern Central Asia

文献类型：期刊论文

作者Lan, Jianghu2; Xu, Hai3; Yu, Keke4; Sheng, Enguo5; Zhou, Kangen2,6; Wang, Tianli2,6; Ye, Yuanda2,6; Yan, Dongna2,6; Wu, Huixian2,6; Cheng, Peng2
刊名SCIENCE CHINA-EARTH SCIENCES
出版日期2019-08-01
卷号62期号:8页码:1288-1301
关键词Lake Sayram Hydroclimatic variation Late Holocene Mid-latitude Westerlies North Atlantic Oscillation index
ISSN号1674-7313
DOI10.1007/s11430-018-9240-x
通讯作者Xu, Hai(xuhai@tju.edu.cn)
英文摘要Hydroclimatic variations over the eastern Central Asia are highly sensitive to changes in hemispheric-scale atmospheric circulation systems. To fully understand the long-term variability and relationship between hydroclimate and atmospheric circulation system, we present a high-resolution lascustrine record of late Holocene hydroclimate from Lake Sayram, Central Tianshan Mountains, China, based on the total organic carbon, total nitrogen, and carbonate contents, carbon/nitrogen ratios, and grain size. Our results reveal four periods of substantially increased precipitation at the interval of 4000-3780, 3590-3210, 2800-2160, and 890-280 cal yr BP, and one period of slightly increased precipitation from 1700-1370 cal yr BP. These wetter periods broadly coincide with those identified in other records from the mid-latitude Westerlies-dominated eastern Central Asia, including the northern Tibetan Plateau. As such, a similar hydroclimatic pattern existed over this entire region during the late Holocene. Based on a close similarity of our record with reconstruction of North Atlantic Oscillation indices and solar irradiance, we propose that decreased solar irradiance and southern migration of the entire circum-North Atlantic circulation system, particularly the main pathway of the mid-latitude Westerlies, significantly influenced hydroclimate in eastern Central Asia during the late Holocene. Finally, the inferred precipitation at Lake Sayram has increased markedly over the past 100 years, although this potential future changes in hydroclimate in Central Asia need for further investigation.
WOS关键词NORTH-ATLANTIC CLIMATE ; RADIOCARBON AGE CALIBRATION ; CENTRAL TIAN-SHAN ; ARID CENTRAL-ASIA ; ICE-AGE ; ORGANIC-MATTER ; BOSTEN LAKE ; ENVIRONMENTAL-CHANGES ; LACUSTRINE SEDIMENTS ; MOISTURE VARIATIONS
资助项目National Natural Science Foundation of China[41672169] ; National Natural Science Foundation of China[41473120] ; National Natural Science Foundation of China[41502171] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2012295]
WOS研究方向Geology
语种英语
WOS记录号WOS:000472529900008
出版者SCIENCE PRESS
资助机构National Natural Science Foundation of China ; Youth Innovation Promotion Association of Chinese Academy of Sciences
源URL[http://ir.ieecas.cn/handle/361006/13796]  
专题地球环境研究所_现代环境研究室
通讯作者Xu, Hai
作者单位1.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
3.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China
4.Baoji Univ Arts & Sci, Key Lab Disaster Monitoring & Mech Simulating Sha, Baoji 721013, Shaanxi, Peoples R China
5.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Guizhou, Peoples R China
6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
7.Adm Comm Lake Sayram, Bozhou 833400, Peoples R China
推荐引用方式
GB/T 7714		 Lan, Jianghu,Xu, Hai,Yu, Keke,et al. Late Holocene hydroclimatic variations and possible forcing mechanisms over the eastern Central Asia[J]. SCIENCE CHINA-EARTH SCIENCES,2019,62(8):1288-1301.
APA Lan, Jianghu.,Xu, Hai.,Yu, Keke.,Sheng, Enguo.,Zhou, Kangen.,...&Tan, Liangcheng.(2019).Late Holocene hydroclimatic variations and possible forcing mechanisms over the eastern Central Asia.SCIENCE CHINA-EARTH SCIENCES,62(8),1288-1301.
MLA Lan, Jianghu,et al."Late Holocene hydroclimatic variations and possible forcing mechanisms over the eastern Central Asia".SCIENCE CHINA-EARTH SCIENCES 62.8(2019):1288-1301.

入库方式： OAI收割

来源：地球环境研究所

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