Using Ground Penetrating Radar for Permafrost Monitoring from 2015–2017 at CALM Sites in the Pechora River Delta
| Autor: | Marat Sadurtdinov, Maria Sudakova, Andrei Skvortsov, Nadezda Molokitina, Andrei Tsarev, Vladimir E. Romanovsky, G. V. Malkova |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
geography
River delta geography.geographical_feature_category Science Permafrost Active layer Permafrost degradation water content measurements permafrost monitoring Ground-penetrating radar General Earth and Planetary Sciences Table (landform) Thermal state CALM GPR multifold Geomorphology Water content Geology permafrost degradation |
| Zdroj: | Remote Sensing, Vol 13, Iss 3271, p 3271 (2021) Remote Sensing Volume 13 Issue 16 Pages: 3271 |
| ISSN: | 2072-4292 |
| Popis: | This paper describes the results of ground penetrating radar (GPR) research combined with geocryological data collected from the Circumpolar Active Layer Monitoring (CALM) testing sites in Kashin and Kumzha in August 2015, 2016, and 2017. The study area was located on the Pechora River delta. Both sites were composed of sandy ground and the permafrost depth at the different sites ranged from 20 cm to 8–9 m. The combination of optimum offset and multifold GPR methods showed promising results in these investigations of sandy permafrost geological profiles. According to direct and indirect observations after the abnormally warm conditions in 2016, the thickness and water content of the active layer in 2017 almost returned to the values in 2015 in the Kashin area. In contrast, the lowering of the permafrost table continued at Kumzha, and lenses of thin frozen rocks that were observed in the thawed layer in August of 2015 and 2017 were absent in 2016. According to recent geocryological and geophysical observations, increasing permafrost degradation might be occurring in the Pechora River delta due to the instability of the thermal state of the permafrost. |
| Databáze: | OpenAIRE |
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