Evolution of thermokarst in East Siberian ice-rich permafrost ...
Thermokarst lakes and basins are major components of ice-rich permafrost landscapes in East Siberian coastal lowlands and are regarded as indicators of regional climatic changes. We investigate the temporal and spatial dynamics of a 7.5 km**2, partly drained thermokarst basin (alas) using field inve...
| Main Authors: | , , , , , , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
PANGAEA
2013
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.848491 https://doi.pangaea.de/10.1594/PANGAEA.848491 |
| Summary: | Thermokarst lakes and basins are major components of ice-rich permafrost landscapes in East Siberian coastal lowlands and are regarded as indicators of regional climatic changes. We investigate the temporal and spatial dynamics of a 7.5 km**2, partly drained thermokarst basin (alas) using field investigations, remote sensing, Geographic Information Systems (GIS), and sediment analyses. The evolution of the thermokarst basin proceeded in two phases. The first phase started at the Pleistocene/Holocene transition (13 to 12 ka BP) with the initiation of a primary thermokarst lake on the Ice Complex surface. The lake expanded and persisted throughout the early Holocene before it drained abruptly about 5.7 ka BP, thereby creating a > 20 m deep alas with residual lakes. The second phase (5.7 ka BP to present) is characterized by alternating stages of lower and higher thermokarst intensity within the alas that were mainly controlled by local hydrological and relief conditions and accompanied by permafrost ... : Supplement to: Morgenstern, Anne; Ulrich, Mathias; Günther, Frank; Roessler, Sebastian; Fedorova, Irina V; Rudaya, Natalia; Wetterich, Sebastian; Boike, Julia; Schirrmeister, Lutz (2013): Evolution of thermokarst in East Siberian ice-rich permafrost: A case study. Geomorphology, 201, 363-379 ... |
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