气候变化领域集成服务门户(CCPortal): A 2540-year record of moisture variations derived from lacustrine sediment (Sasikul Lake) on the Pamir Plateau

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DOI	10.1177/0959683614530443
	A 2540-year record of moisture variations derived from lacustrine sediment (Sasikul Lake) on the Pamir Plateau
	Lei, Yanbin; Tian, Lide; Bird, Broxton W.; Hou, Juzhi; Ding, Lin; Oimahmadov, Ilhomjon; Gadoev, Mustafo
通讯作者	Lei, YB (通讯作者)
发表日期	2014
ISSN	0959-6836
EISSN	1477-0911
起始页码	761
结束页码	770
卷号	24 期号:7
英文摘要	Although the Pamir Plateau is an ideal place to investigate paleo-environmental changes in the westerlies-dominated high Central Asia, there are only few Holocene records from this region. We present a sub-centennially resolved lacustrine record of moisture variations from Sasikul Lake, central Pamir Plateau, based on geochemical, sedimentological, and mineralogical proxies. Our results show that generally dry conditions at Sasikul Lake during the past 2540 years were interrupted by a pronounced wet period between ad 1550 and 1900, corresponding to the 'Little Ice Age' (LIA). More negative values of carbonate delta O-18, lower total inorganic carbon (TIC) and sand content during the LIA all indicate a relatively wet period with higher lake level. Higher TIC during the 'Medieval Warm Period' (MWP; AD 950-1200) reveals a lower lake level relative to the LIA. Low d18O during this time is probably attributed to changes in the isotopic composition of input water and/or upstream moisture sources. The significant increase in detrital minerals and decrease in carbonate during the LIA provide further evidence for higher allochthonous input during the wet period at Sasikul Lake. The inferred moisture variations are consistent with existing records from regions of the northern Tibetan Plateau and Central Asia that are also influenced by the westerlies, but out-of-phase with those records from the Asian monsoon region, indicating that moisture variations at Sasikul Lake were mainly influenced by the strength and trajectories of the westerlies. The inferred water level at Sasikul Lake decreased significantly during the first half of the 20th century, and then increased in recent decades. This is consistent with the increase in lake area derived from satellite images and the monitoring data of large lake-level changes in Central Asia.
关键词	HIGH-RESOLUTION POLLEN ASIAN MONSOON TIBETAN PLATEAU CLIMATIC-CHANGE CORE SEDIMENTS CASPIAN SEA TARIM BASIN ARAL SEA HOLOCENE CARBON
英文关键词	lacustrine sediment; 'Little Ice Age'; moisture variations; Pamir Plateau; Sasikul Lake; the westerlies
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000337561400001
来源期刊	HOLOCENE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258328
推荐引用方式 GB/T 7714	Lei, Yanbin,Tian, Lide,Bird, Broxton W.,et al. A 2540-year record of moisture variations derived from lacustrine sediment (Sasikul Lake) on the Pamir Plateau[J]. 中国科学院青藏高原研究所,2014,24(7).
APA	Lei, Yanbin.,Tian, Lide.,Bird, Broxton W..,Hou, Juzhi.,Ding, Lin.,...&Gadoev, Mustafo.(2014).A 2540-year record of moisture variations derived from lacustrine sediment (Sasikul Lake) on the Pamir Plateau.HOLOCENE,24(7).
MLA	Lei, Yanbin,et al."A 2540-year record of moisture variations derived from lacustrine sediment (Sasikul Lake) on the Pamir Plateau".HOLOCENE 24.7(2014).