气候变化领域集成服务门户(CCPortal): Abrupt Freshening Since the Early Little Ice Age in Lake Sayram of Arid Central Asia Inferred From an Alkenone Isomer Proxy

CCPortal

DOI	10.1029/2020GL089257
	Abrupt Freshening Since the Early Little Ice Age in Lake Sayram of Arid Central Asia Inferred From an Alkenone Isomer Proxy
	Yao Y.; Lan J.; Zhao J.; Vachula R.S.; Xu H.; Cai Y.; Cheng H.; Huang Y.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	Hydroclimatic variations of arid central Asia (ACA) significantly impact regional ecosystems and human civilizations. Here we present a lake water salinity record of the last 3,000 years from Lake Sayram in the core area of ACA using a new alkenone isomer-based RIK37 index. Our record shows an abrupt decrease in salinity by more than 5‰ since the “early” Little Ice Age (LIA) (about CE 1150), which can be attributed to the combined effect of regional wetting, cooling, and topographic features. Combined with other moisture records in the region, we find two periods of relatively wet conditions during CE 1150–1550 and 1850 to present, which may be linked to Arctic sea ice expansion due to natural variability and, from CE 1950, anthropogenically induced warming. The wet conditions during CE 1206–1260 may have favored the spread of the Mongol Empire across the entire core area of ACA. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Glacial geology; Isomers; Sea ice; Arctic sea ice; Combined effect; Human civilization; Hydroclimatic; Little Ice Age; Natural variability; Topographic features; Wet conditions; Lakes; alkenone; cooling; hydrometeorology; lake water; Little Ice Age; moisture content; proxy climate record; salinity; sea ice; wet deposition; Arctic; Central Asia; China; Sayram Lake; Xinjiang Uygur; Isochrysidales
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169889
作者单位	Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China; Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xi'an, China; Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI, United States; Institute of Surface-Earth System Science, Tianjin University, Tianjin, China
推荐引用方式 GB/T 7714	Yao Y.,Lan J.,Zhao J.,et al. Abrupt Freshening Since the Early Little Ice Age in Lake Sayram of Arid Central Asia Inferred From an Alkenone Isomer Proxy[J],2020,47(16).
APA	Yao Y..,Lan J..,Zhao J..,Vachula R.S..,Xu H..,...&Huang Y..(2020).Abrupt Freshening Since the Early Little Ice Age in Lake Sayram of Arid Central Asia Inferred From an Alkenone Isomer Proxy.Geophysical Research Letters,47(16).
MLA	Yao Y.,et al."Abrupt Freshening Since the Early Little Ice Age in Lake Sayram of Arid Central Asia Inferred From an Alkenone Isomer Proxy".Geophysical Research Letters 47.16(2020).