Assessment of spring floods and surface water extent over the Yamalo-Nenets Autonomous District

Remote sensing of Arctic water bodies is an essential method for monitoring the dynamics of frozen ground. Thaw lake change provides insight into the state of permafrost. In the vast Arctic and sub-Arctic areas capturing changes in lake extent is assisted by satellite data. In particular, active mic...

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Veröffentlicht in:Environmental research letters Jg. 8; H. 4; S. 45026 - 9
Hauptverfasser: Trofaier, A M, Bartsch, A, Rees, W G, Leibman, M O
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Bristol IOP Publishing 01.12.2013
Schlagworte:
active microwave
Active satellites
Algorithms
Anthropogenic factors
Arctic zone
Depletion
Floodplains
Floods
Frozen ground
Hydrology
Lakes
Land use
Meltwater
Microwave sensors
Monitoring methods
Permafrost
Post-production processing
Remote sensing
Seasonal variations
Snow cover
Spring
Spring (season)
surface hydrology
Surface water
Synthetic aperture radar
Water bodies
wetland dynamics-remote sensing
Arctic region
PN, Arctic
ISSN:1748-9326, 1748-9326
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Zusammenfassung:Remote sensing of Arctic water bodies is an essential method for monitoring the dynamics of frozen ground. Thaw lake change provides insight into the state of permafrost. In the vast Arctic and sub-Arctic areas capturing changes in lake extent is assisted by satellite data. In particular, active microwave sensors can be used in a straightforward manner for water body classifications. This study uses the pan-Siberian datasets that are provided under the ESA STSE-ALANIS methane project. Surface water classifications in 10-day intervals have been produced using Envisat ASAR (Advanced Synthetic Aperture Radar) operating in wide swath mode. The high temporal frequency of these data allows an investigation of surface hydrology on an intra-annual basis. The current study applies a post-processing algorithm to the ALANIS products in order to investigate changes in surface inundation across the Yamalo-Nenets Autonomous District over the summer period of 2007. Multiple areas are found to exhibit changes in surface inundation. Strong seasonal variations occur in areas where previous investigations determined disappearing lakes. Spring floods associated with the depletion of snow-cover and melt waters as well as floodplain dynamics can be identified. On the Yamal peninsula, these changes occur most dominantly in the west; an area subject to anthropogenic land-use change. Changes in water body extent for each hot spot of seasonal variations are quantified and discussed.
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ISSN:1748-9326
1748-9326
DOI:10.1088/1748-9326/8/4/045026