Circumpolar ground-fast lake ice fraction by lake from ENVISAT ASAR late winter 2008, links to Shapfiles ...
Shallow lakes are common across the entire Arctic. They play an important role as methane sources and wildlife habitats, and they are also associated with thermokarst processes which are characteristic of permafrost environments. Many lakes freeze to the ground along their rims and often over the en...
| Main Authors: | , , , , , |
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| Format: | Dataset |
| Language: | English |
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PANGAEA
2017
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.873674 https://doi.pangaea.de/10.1594/PANGAEA.873674 |
| Summary: | Shallow lakes are common across the entire Arctic. They play an important role as methane sources and wildlife habitats, and they are also associated with thermokarst processes which are characteristic of permafrost environments. Many lakes freeze to the ground along their rims and often over the entire extent during winter time. Knowledge on the spatial patterns of ground-fast and floating ice is important as it relates to methane release, talik formation and hydrological processes, but no circumpolar account of this phenomenon is currently available. Previous studies have shown that ground-fast ice can easily be detected using C-band Synthetic Aperture Radar (SAR) backscatter intensity data acquired from satellites. A major challenge is that backscatter intensity varies across the satellite scenes due to incidence angle effects. Circumpolar application therefore requires the inclusion of incidence angle dependencies into the detection algorithm. An approach using ENVISAT ASAR Wide Swath data (approximately ... : Supplement to: Bartsch, Annett; Pointner, Georg; Leibman, Marina O; Dvornikov, Yury; Khomutov, Artem V; Trofaier, Anna Maria (2017): Circumpolar Mapping of Ground-Fast Lake Ice. Frontiers in Earth Science, 5(12), 16 pp ... |
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