气候变化领域集成服务门户(CCPortal): Investigation of bathymetry and water quality of Lake Nam Co, the largest lake on the central Tibetan Plateau, China

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DOI	10.1007/s10201-009-0266-8
	Investigation of bathymetry and water quality of Lake Nam Co, the largest lake on the central Tibetan Plateau, China
	Wang, Junbo; Zhu, Liping; Daut, Gerhard; Ju, Jianting; Lin, Xiao; Wang, Yong; Zhen, Xiaolin
通讯作者	Wang, JB (通讯作者)
发表日期	2009
ISSN	1439-8621
起始页码	149
结束页码	158
卷号	10 期号:2
英文摘要	Comprehensive field investigations have been conducted four times on Nam Co, central Tibet, from September 2005 to September 2008. Here, we present the preliminary results focusing on the bathymetric survey and water quality measurements. The isobathic map shows that Nam Co is a high-altitude, deep lake where a flat and large basin lies in the central part with a water depth of more than 90 m. Water depth data from the northwestern bank areas of Nam Co provide unquestionable evidence of rising water levels in the last 3 decades because of the formation of two small islands that were still peninsulas in the 1970s. Water quality measurements taken at 19 stations during three summer field campaigns (2006, 2007 and 2008) covering almost all of the lake areas showed that the temperature, pH, dissolved oxygen and electric conductivity of surface water are on average 11.43A degrees C, 9.21, 8.90 mg l(-1) and 1,851 mu S cm(-1), respectively. The surface water shows no obvious spatial variability among all the stations. Vertical fluctuations of profiles, however, display some differences in thermocline and related parameters, such as pH and dissolved oxygen. According to the vertical variations of water quality parameters, the water column in relatively deep lake areas of Nam Co could be divided into three layers with distinctly various features: the epilimnion is from the surface to about 18-20 m depth in which the parameters are homogeneous with higher temperature and abundant sunlight; the metalimnion ranged from 20-60 m where a thermocline develops; the deepest layer forms a cold and dark hypolimnion.
关键词	ENVIRONMENTAL-CHANGES SEDIMENTS CATCHMENT
英文关键词	Bathymetric survey; Water level rising; Water quality; Thermocline; Nam Co; Tibetan Plateau
语种	英语
WOS研究方向	Marine & Freshwater Biology
WOS类目	Limnology
WOS记录号	WOS:000268017800009
来源期刊	LIMNOLOGY
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/257667
推荐引用方式 GB/T 7714	Wang, Junbo,Zhu, Liping,Daut, Gerhard,et al. Investigation of bathymetry and water quality of Lake Nam Co, the largest lake on the central Tibetan Plateau, China[J]. 中国科学院青藏高原研究所,2009,10(2).
APA	Wang, Junbo.,Zhu, Liping.,Daut, Gerhard.,Ju, Jianting.,Lin, Xiao.,...&Zhen, Xiaolin.(2009).Investigation of bathymetry and water quality of Lake Nam Co, the largest lake on the central Tibetan Plateau, China.LIMNOLOGY,10(2).
MLA	Wang, Junbo,et al."Investigation of bathymetry and water quality of Lake Nam Co, the largest lake on the central Tibetan Plateau, China".LIMNOLOGY 10.2(2009).