气候变化领域集成服务门户(CCPortal): Water and sediment chemistry of Lake Pumayum Co, South Tibet, China: implications for interpreting sediment carbonate

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DOI	10.1007/s10933-009-9343-6
	Water and sediment chemistry of Lake Pumayum Co, South Tibet, China: implications for interpreting sediment carbonate
	Ju, Jianting; Zhu, Li-ping; Wang, Junbo; Xie, Manping; Zhen, Xiaolin; Wang, Yong; Peng, Ping
通讯作者	Ju, JT (通讯作者)
发表日期	2010
ISSN	0921-2728
EISSN	1573-0417
起始页码	463
结束页码	474
卷号	43 期号:3
英文摘要	A combination of water and sediment chemistry was used to investigate carbonate production and preservation in Lake Pumayum Co (altitude 5,030 m a.s.l.), south Tibet, China. We compared the chemical composition of lake water in various parts of the lake with that of input rivers and found that the loss of Ca2+ results from calcite sedimentation induced by evaporation and biogenic precipitation. This is supported by evaporation data from the catchment and delta O-18 measurements on water. Results suggest that CaCO3 is the predominant carbonate in this lake. There is a positive correlation in the sediments among concentrations of total inorganic carbon (TIC), Ca, total organic carbon (TOC), and total nitrogen, confirming that most carbonates in sediment are endogenic. The Jiaqu River is the largest inflow to Lake Pumayum Co and has a strong influence on both lake water chemistry and sediment composition. The river and lake bathymetry influence carbonate sedimentation by affecting water flow velocity and growing conditions for macrophytes. Different carbon contents and relationships between TIC and TOC in the two long cores from different depths in the lake reveal that hypolimnetic conditions also influence carbonate precipitation and preservation.
关键词	CALCITE PRECIPITATION QINGHAI LAKE CONSTANCE PLATEAU CLIMATE MONSOON RECORD BASIN AREA
英文关键词	Carbonate; Lake sediments; Tibetan Plateau; Water chemistry; Spatial distribution; Lake Pumayum Co
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:000275415900004
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/257755
推荐引用方式 GB/T 7714	Ju, Jianting,Zhu, Li-ping,Wang, Junbo,et al. Water and sediment chemistry of Lake Pumayum Co, South Tibet, China: implications for interpreting sediment carbonate[J]. 中国科学院青藏高原研究所,2010,43(3).
APA	Ju, Jianting.,Zhu, Li-ping.,Wang, Junbo.,Xie, Manping.,Zhen, Xiaolin.,...&Peng, Ping.(2010).Water and sediment chemistry of Lake Pumayum Co, South Tibet, China: implications for interpreting sediment carbonate.JOURNAL OF PALEOLIMNOLOGY,43(3).
MLA	Ju, Jianting,et al."Water and sediment chemistry of Lake Pumayum Co, South Tibet, China: implications for interpreting sediment carbonate".JOURNAL OF PALEOLIMNOLOGY 43.3(2010).