气候变化领域集成服务门户(CCPortal): Quantitative analysis of lake area variations and the influence factors from 1971 to 2004 in the Nam Co basin of the Tibetan Plateau

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DOI	10.1007/s11434-010-0015-8
	Quantitative analysis of lake area variations and the influence factors from 1971 to 2004 in the Nam Co basin of the Tibetan Plateau
	Zhu LiPing; Xie ManPing; Wu YanHong
通讯作者	Zhu, LP (通讯作者)
发表日期	2010
ISSN	1001-6538
起始页码	1294
结束页码	1303
卷号	55 期号:13
英文摘要	By using remote sensing and GIS technologies, spatial analysis and statistic analysis, we calculated the water area and volume variations of the Nam Co Lake from 1971-2004, and discussed their influence factors from the viewpoints of climatic change and water balance. Data source in this study includes bathymetric data of the lake, aerial surveyed topographic maps of 1970, remote sensing images of 1991 and 2004 in the lake catchment, meteorological data from 17 stations within 1971-2004 in the adjacent area of the lake catchment. The results showed that the lake area expanded from 1920 km(2) to 2015 km(2) during 1971 to 2004 with the mean annual increasing rate (MAIR) of 2.81 km(2) a(-1), and the lake volume augmented from 783.23x10(8) m(3) to 863.77x10(8) m(3) with the MAIR of 2.37x10(8) m(3). Moreover, the MAIR of the lake area and volume are both higher during 1992 to 2004 (4.01 km(2) a(-1) and 3.61x10(8) m(3) a(-1)) than those during 1971 to 1991 (2.06 km(2) a(-1) and 1.60x10(8) m(3) a(-1)). Analyses of meteorological data indicated that the continue rising of air temperature conduced more glacier melting water. This part of water supply, together with the increasing precipitation and the descending evaporation, contributed to the enlargement of Nam Co Lake. The roughly water balance analyses of lake water volume implied that, in two study periods (1971-1991 and 1992-2004), the precipitation supplies (direct precipitations on the lake area and stream flow derived from precipitations) accounted for 63% and 61.92% of the whole supplies, while the glacier melting water supplies occupied only 8.55% and 11.48%, respectively. This showed that precipitations were main water supplies of the Nam Co Lake. However, for the reason of lake water increasing, the increased amount from precipitations accounted for 46.67% of total increased water supplies, while the increased amount from glacier melting water reached 52.86% of total increased water supplies. The ratio of lake evaporation and lake volume augment showed that 95.71% of total increased water supplies contributed to the augment of lake volume. Therefore, the increased glacier melting water accounted for about 50.6% of augment of the lake volume, which suggested that the increased glacier melting water was the main reason for the quickly enlargement of the Nam Co lake under the continuous temperature rising.
关键词	CLIMATE-CHANGE GLACIER VARIATIONS GIS TECHNOLOGIES WATER-BALANCE CHINA FLUCTUATIONS MOUNTAIN QINGHAI IMPACT
英文关键词	Tibetan Plateau; Nam Co Lake; lake area variation; remote sensing; water balance
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000277369300010
来源期刊	CHINESE SCIENCE BULLETIN
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/257729
推荐引用方式 GB/T 7714	Zhu LiPing,Xie ManPing,Wu YanHong. Quantitative analysis of lake area variations and the influence factors from 1971 to 2004 in the Nam Co basin of the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2010,55(13).
APA	Zhu LiPing,Xie ManPing,&Wu YanHong.(2010).Quantitative analysis of lake area variations and the influence factors from 1971 to 2004 in the Nam Co basin of the Tibetan Plateau.CHINESE SCIENCE BULLETIN,55(13).
MLA	Zhu LiPing,et al."Quantitative analysis of lake area variations and the influence factors from 1971 to 2004 in the Nam Co basin of the Tibetan Plateau".CHINESE SCIENCE BULLETIN 55.13(2010).