气候变化领域集成服务门户(CCPortal): Holocene paleoenvironmental change inferred from two sediment cores collected in the Tibetan lake Taro Co

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DOI	10.1007/s10933-021-00198-6
	Holocene paleoenvironmental change inferred from two sediment cores collected in the Tibetan lake Taro Co
	Laug, Andreas; Haberzettl, Torsten; Pannes, Andre; Schwarz, Anja; Turner, Falko; Wang, Junbo; Engels, Stefan; Rigterink, Sonja; Boerner, Nicole; Ahlborn, Marieke; Ju, Jianting; Schwalb, Antje
通讯作者	Laug, A (通讯作者)
发表日期	2021
ISSN	0921-2728
EISSN	1573-0417
起始页码	171
结束页码	186
卷号	66 期号:3
英文摘要	The Tibetan Plateau, also known as the Water Tower of Asia because of its function as a water storage and supply region, responds dramatically to modern climate changes. Paleoecological shifts inferred from lake sediment archives provide essential insights into past climate changes, and the processes that drove those shifts. This is especially true for studies of lakes in endorheic basins on the Tibetan Plateau, where lake level is regulated predominantly by Monsoon intensity. Such water bodies provide excellent opportunities to reconstruct past changes in humidity. Most paleolimnological investigations of lakes on the Tibetan Plateau, however, have involved the study of a single sediment core, making it difficult to discern between changes caused by local events and those caused by lake-wide or regional processes. Here we present results from a paleolimnological study of Lake Taro Co, a currently closed-basin lake in Central Tibet. We compared a sediment record from the central part of the lake to a record from the near-shore area, and present results of sedimentological and bioindicator (chironomid, diatom, pollen) analyses from both records. Results show three periods of lake-wide ecosystem change (> ca. 5250, 5250-2250 and < since about 2250 cal year BP), which reflect a continuous drying trend throughout the Middle and Late Holocene. In addition to this lake-wide trend, we identified two local events in the sediment core from the southeastern, nearshore site. These include (1) a hiatus between 12,400 and 5400 cal year BP and (2) an 1800-year period of distinct paleoenvironmental conditions (5400-3600 cal year BP). We hypothesize that both events were caused by relocation of a river in the southeast sector of the lake's catchment. We propose that the first relocation caused an erosion event that removed sediment, thereby producing the hiatus. During the following 1800 years, the core site may have been located on the river delta, before another river relocation at 3600 cal year BP established the modern prodelta situation. Our study demonstrates the value of using multiple sediment cores from a lake, to better identify processes that control widespread versus local events.
关键词	NAM CO ENVIRONMENTAL-CHANGES DIATOM ASSEMBLAGES SURFACE SEDIMENTS CLIMATE-CHANGE MULTI-PROXY SELIN CO PLATEAU OSTRACOD RECORDS
英文关键词	Monsoon; Chironomidae; Diatoms; Geochemistry; XRF; Paleolimnology
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Marine & Freshwater Biology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Limnology
WOS记录号	WOS:000674199300001
来源期刊	JOURNAL OF PALEOLIMNOLOGY
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/260449
推荐引用方式 GB/T 7714	Laug, Andreas,Haberzettl, Torsten,Pannes, Andre,et al. Holocene paleoenvironmental change inferred from two sediment cores collected in the Tibetan lake Taro Co[J]. 中国科学院青藏高原研究所,2021,66(3).
APA	Laug, Andreas.,Haberzettl, Torsten.,Pannes, Andre.,Schwarz, Anja.,Turner, Falko.,...&Schwalb, Antje.(2021).Holocene paleoenvironmental change inferred from two sediment cores collected in the Tibetan lake Taro Co.JOURNAL OF PALEOLIMNOLOGY,66(3).
MLA	Laug, Andreas,et al."Holocene paleoenvironmental change inferred from two sediment cores collected in the Tibetan lake Taro Co".JOURNAL OF PALEOLIMNOLOGY 66.3(2021).