NDLI: Thermokarst lake changes between 1969 and 2010 in the Beilu River Basin, Qinghai

Content Provider	Springer Nature Link
Author	Luo, Jing Niu, Fujun Lin, Zhanju Liu, Minghao Yin, Guoan
Copyright Year	2015
Abstract	This work presents changes of thermokarst lakes from Beilu River Basin on the Qinghai–Tibet Plateau over the past four decades (1969–2010) using aerial and satellite image interpretation. The results indicated that thermokarst lake activity had generally increased rapidly between 1969 and 2010. The number of thermokarst lakes had increased by approximately 534, and their coverage expanded by about 410 ha. The two main changes observed were an increase in the number of small lakes and the expansion of larger lakes. These changes are likely the result of persistent climate warming and a gradually increasing imbalance between precipitation and evapotranspiration (P–ET). However, some non-climatic factors, such as the lake-bottom substrate and local engineering activities, have also influenced the lake changes. If air temperature and P–ET continue to rise, the number of thermokarst lakes and the area they cover may continue to increase in the future.基于青藏高原北麓河盆地1969年航片资料以及2003和2010年SPOT-5遥感资料的解译, 对该地区过去40年面积大于0.1 ha (1 ha = 10,000 m$^{2}$)的热喀斯特湖面积和数量变化进行了研究. 结果表明, 该区域热喀斯特湖在过去40年中(1969 ~ 2010)年呈现显著的扩张趋势, 湖塘的总数量增加了534个, 总面积增加了410 ha. 此外, 通过对1969年所有湖塘的追踪统计, 自1969年至2010年大部分(84%)湖塘的面积呈增大的趋势, 只有8%的湖塘面积减小和6%的湖塘彻底消失. 这种湖塘数量和面积的增大趋势可能与持续升高的气温和逐渐增大的P-E值(降水与潜蒸散的差值)有关, 但是一些非气候因素(比如工程活动、湖底的透水性等)对湖塘的演化过程也具有重要的影响.
Starting Page	556
Ending Page	564
Page Count	9
File Format	PDF
ISSN	20959273
Journal	Chinese Science Bulletin
Volume Number	60
Issue Number	5
e-ISSN	20959281
Language	Chinese
Publisher	Science China Press
Publisher Date	2015-01-23
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Permafrost Thermokarst lakes Remote sensing Qinghai–Tibet Plateau Science Life Sciences Physics Chemistry/Food Science Earth Sciences Engineering
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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