气候变化领域集成服务门户(CCPortal): Investigation of the dynamics in area and number of thermokarst lakes in various regions of Russian cryolithozone, using satellite images

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	Investigation of the dynamics in area and number of thermokarst lakes in various regions of Russian cryolithozone, using satellite images
	Kravtsova V.I.; Rodionova T.V.
发表日期	2016
ISSN	15607496
卷号	20 期号:1
英文摘要	We have developed a reliable method to determine changes in the area of thermokarst lakes, which is based on comparison of multitemporal imagery from Landsat satellites. These were acquired during the warming period since the 1970s. The method takes into account the diff erence in spatial resolution for MSS (Multispectral Scanner) and TM (Thematic Mapper) scanning systems. We have investigated 39 test sites which cover nearly 300,000 lakes in six regions of the Russian cryolithozone: the North of European Russia, Western Siberia, Eastern Siberia and Far East, Central Yakutia, Transbaikal hollows. As a result, we have identifi ed very small and contradictory changes in 1970-2000: Areas of some lakes reduced by 2.9 % and areas of others enlarged by 1.2 %. Mass reduction in lake areas occurs when they are drained by rivers. Increase in lake areas is widespread due to infl ux of water with rivers, cyclical changes in precipitation (Central Yakutia), anthropogenic pressure (West Siberia), and activation of thermokarst in highly icy permafrost (Yamal, Yana-Indigirka lowland). We conclude that the dynamics of the area and number of thermokarst lakes is controlled by a complex set of factors and so they cannot be used as indicators of climate warming impact on cryolithozone.
英文关键词	Climate warming; Cryolithozone; Dynamics; Satellite images; Thermokarst lakes
学科领域	climate effect; global warming; lake water; Landsat; permafrost; precipitation (climatology); satellite imagery; spatial resolution; thermokarst; Russian Federation; Sakha; Siberia
语种	英语
scopus关键词	climate effect; global warming; lake water; Landsat; permafrost; precipitation (climatology); satellite imagery; spatial resolution; thermokarst; Russian Federation; Sakha; Siberia
来源期刊	Earth's Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119758
作者单位	Department of Geography, Lomonosov Moscow State University, Leninskie Gory, 1, Moscow, 199991, Russian Federation
推荐引用方式 GB/T 7714	Kravtsova V.I.,Rodionova T.V.. Investigation of the dynamics in area and number of thermokarst lakes in various regions of Russian cryolithozone, using satellite images[J],2016,20(1).
APA	Kravtsova V.I.,&Rodionova T.V..(2016).Investigation of the dynamics in area and number of thermokarst lakes in various regions of Russian cryolithozone, using satellite images.Earth's Cryosphere,20(1).
MLA	Kravtsova V.I.,et al."Investigation of the dynamics in area and number of thermokarst lakes in various regions of Russian cryolithozone, using satellite images".Earth's Cryosphere 20.1(2016).