Late-Holocene Indian summer monsoon variability revealed from a 3300-year-long lake sediment record from Nir'pa Co, southeastern Tibet

doi:10.1177/0959683616670220

	Late-Holocene Indian summer monsoon variability revealed from a 3300-year-long lake sediment record from Nir'pa Co, southeastern Tibet
	Lei, YB (Lei, Yanbin)3,4; Bird, BW (Bird, Broxton W.)2; Perello, M (Perello, Melanie)2; Polissar, PJ (Polissar, Pratigya J.)5; Yao, TD (Yao, Tandong)3,4; Finney, B (Finney, Bruce)6; Bain, D (Bain, Daniel)7; Pompeani, D (Pompeani, David)7; Thompson, LG (Thompson, Lonnie G.)1; Bird, BW
刊名	HOLOCENE
	2017
卷号	27 期号:4 页码:541-552
关键词	TROPICAL PACIFIC-OCEAN LAST 2 MILLENNIA EL-NINO ENVIRONMENTAL-CHANGES ASIAN MONSOON ICE-AGE NAM-CO PLATEAU CLIMATE RAINFALL
DOI	10.1177/0959683616670220
文献子类	Article
英文摘要	Sedimentological and geochemical results from Nir'pa Co, an alpine lake on the southeastern Tibetan Plateau, detail late-Holocene Indian summer monsoon (ISM) hydroclimate during the last 3300 years. Constrained by modern calibration, elevated silt and lithics and low sand and clay between 3.3 and 2.4 ka and 1.3 ka and the present indicate two pluvial phases with lake levels near their current overflow elevation. Between 2.4 and 1.3 ka, a sharp increase in sand and corresponding decrease in lithics and silt suggest drier conditions and lower lake levels at Nir'pa Co. Hydroclimate expressions in the sedimentological proxies during the Medieval Climate Anomaly (MCA) and Little Ice Age' (LIA) are not statistically significant, suggesting that these events were minor compared to the millennial scale variability on which they were superimposed. However, decreasing sand and increasing lithics and silt during the MCA between 950 and 800 cal. yr BP may suggest briefly wetter conditions, while increasing sand and reduced lithics and silt from 500 to 200 cal. yr BP suggest potentially drier conditions during the LIA. Similarities with regional records from lake sediment and ice cores and speleothem records from the central and eastern Tibetan Plateau, India, and the Arabian Sea, suggest generally coherent late-Holocene ISM variability in these regions. Increased late-Holocene ISM intensity occurred during times when Tibetan Plateau surface air temperatures were warmer, Indo-Pacific sea surface temperatures were elevated, and the tropical Pacific was in a La Nina-like mean state. Conversely, aridity between 2.4 and 1.3 ka occurred in concert with cooling on the Tibetan Plateau and in the Indo-Pacific with more El Nino-like conditions in the tropical Pacific. Differences with western Tibetan records may reflect a weakened ISM and stronger westerlies in this region during the late-Holocene.
学科主题	自然地理学
WOS研究方向	Physical Geography; Geology
语种	英语
WOS记录号	WOS:000400198600005
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/8303]
专题	青藏高原研究所_图书馆
通讯作者	Bird, BW
作者单位	1.Ohio State Univ, Byrd Polar Res Ctr, Columbus, OH 43210 USA. 2.Indiana Univ Purdue Univ, Dept Earth Sci, 723 W Michigan SL 118, Indianapolis, IN 46202 USA. 3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China. 4.CAS Ctr Excellence Tibetan Plateau Earth Syst, Beijing, Peoples R China. 5.Columbia Univ, Lamont Doherty Earth Observ, New York, NY 10027 USA. 6.Idaho State Univ, Dept Biol Sci, Pocatello, ID 83209 USA. 7.Univ Pittsburgh, Dept Geol & Environm Sci, Pittsburgh, PA 15260 USA.
推荐引用方式 GB/T 7714	Lei, YB ,Bird, BW ,Perello, M ,et al. Late-Holocene Indian summer monsoon variability revealed from a 3300-year-long lake sediment record from Nir'pa Co, southeastern Tibet[J]. HOLOCENE,2017,27(4):541-552.
APA	Lei, YB .,Bird, BW .,Perello, M .,Polissar, PJ .,Yao, TD .,...&Bird, BW.(2017).Late-Holocene Indian summer monsoon variability revealed from a 3300-year-long lake sediment record from Nir'pa Co, southeastern Tibet.HOLOCENE,27(4),541-552.
MLA	Lei, YB ,et al."Late-Holocene Indian summer monsoon variability revealed from a 3300-year-long lake sediment record from Nir'pa Co, southeastern Tibet".HOLOCENE 27.4(2017):541-552.