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

doi:10.1007/s11430-018-9240-x

	Late Holocene hydroclimatic variations and possible forcing mechanisms over the eastern Central Asia
	Lan, Jianghu 4; Xu, Hai 3; Yu, Keke 6; Sheng, Enguo 7; Zhou, Kangen 4,5; Wang, Tianli 4,5; Ye, Yuanda 4,5; Yan, Dongna 4,5; Wu, Huixian 4,5; Cheng, Peng 4
刊名	SCIENCE CHINA-EARTH SCIENCES
	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
DOI	10.1007/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.
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
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000472529900008
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association of Chinese Academy of Sciences
内容类型	期刊论文
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.Adm Comm Lake Sayram, Bozhou 833400, Peoples R China 2.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Shaanxi, Peoples R China 3.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China 4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Baoji Univ Arts & Sci, Key Lab Disaster Monitoring & Mech Simulating Sha, Baoji 721013, Shaanxi, Peoples R China 7.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Guizhou, 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.