气候变化领域集成服务门户(CCPortal): Spatio-temporal variations of hydrochemistry and modern sedimentation processes in the Nam Co basin, Tibetan Plateau: Implications for carbonate precipitation

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DOI	10.1016/j.jglr.2020.04.006
	Spatio-temporal variations of hydrochemistry and modern sedimentation processes in the Nam Co basin, Tibetan Plateau: Implications for carbonate precipitation
	Kai, Jinlei; Wang, Junbo; Ju, Jianting; Huang, Lei; Ma, Qingfeng; Daut, Gerhard; Zhu, Liping
通讯作者	Wang, JB (通讯作者)
发表日期	2020
ISSN	0380-1330
起始页码	961
结束页码	975
卷号	46 期号:4
英文摘要	Lake monitoring studies are essential for understanding the modern biogeochemical and sedimentological cycles to enable and support the interpretation of paleolimnological records. However, such studies remain scarce for high-altitude lakes in general and specifically for lakes on the Tibetan Plateau. We investigated the hydro-chemical and physical properties of lake Nam Co and its twenty-one major inflowing rivers from 2011 to 2013. The modern sediment flux and sediment properties were determined for samples collected by sediment traps deployed for the same study period at different water depths at three sites in Nam Co. Carbonate weathering in the catchment, especially pronounced during the monsoon season, was identified as the predominant origin of dissolved riverine hydrochemical components. The sediment budget shows remarkable temporal variation, with trends of intensified sediment fluxes during the non-monsoon season and small variations within the monsoon season. Spatially, considerably higher sedimentation fluxes were detected in nearshore sites (T1 and T3) and attributed to wind-induced resuspension. Vertically, resuspension is also an important factor that influences the sedimentation process, which leads to an exponential increase of the budget from the surface to the bottom layer. Autochthonous carbonate deposition rates presented a similar seasonal pattern, with the total sedimentation rates under the influence of the water balance. Low values occurred during the monsoon season due to dilution while deposition rapidly increased during the early post-monsoon season when the lake level decreased. Intensive carbonate deposition also occurred during the non-monsoon season, which dominated the lake hydrochemistry dynamics. (C) 2020 International Association for Great Lakes Research. Published by Elsevier B.V. All rights reserved.
关键词	LAKE WATER TEMPORAL VARIATIONS SEASONAL-VARIATION SURFACE SEDIMENTS CLIMATE-CHANGE RIVER WATER MAJOR IONS RESUSPENSION CHINA TRAP
英文关键词	Hydrochemistry; Sedimentation flux; Carbonate deposition; Sediment trap; Resuspension; Nam Co; Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
WOS类目	Environmental Sciences ; Limnology ; Marine & Freshwater Biology
WOS记录号	WOS:000556753300024
来源期刊	JOURNAL OF GREAT LAKES RESEARCH
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/259882
推荐引用方式 GB/T 7714	Kai, Jinlei,Wang, Junbo,Ju, Jianting,et al. Spatio-temporal variations of hydrochemistry and modern sedimentation processes in the Nam Co basin, Tibetan Plateau: Implications for carbonate precipitation[J]. 中国科学院青藏高原研究所,2020,46(4).
APA	Kai, Jinlei.,Wang, Junbo.,Ju, Jianting.,Huang, Lei.,Ma, Qingfeng.,...&Zhu, Liping.(2020).Spatio-temporal variations of hydrochemistry and modern sedimentation processes in the Nam Co basin, Tibetan Plateau: Implications for carbonate precipitation.JOURNAL OF GREAT LAKES RESEARCH,46(4).
MLA	Kai, Jinlei,et al."Spatio-temporal variations of hydrochemistry and modern sedimentation processes in the Nam Co basin, Tibetan Plateau: Implications for carbonate precipitation".JOURNAL OF GREAT LAKES RESEARCH 46.4(2020).