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Angelopoulos, Michael; Overduin, Pier Paul; Westermann, Sebastian; Tronicke, Jens; Strauss, Jens; Schirrmeister, Lutz; Biskaborn, Boris K; Maximov, Georgy M; Liebner, Susanne; Grigoriev, Mikhail N; Kitte, Axel; Grosse, Guido (2019): Water and sediment properties at Polar Fox Lagoon. PANGAEA, https://doi.org/10.1594/PANGAEA.907479, Supplement to: Angelopoulos, Michael; Overduin, Pier Paul; Westermann, Sebastian; Tronicke, Jens; Strauss, Jens; Schirrmeister, Lutz; Biskaborn, Boris K; Liebner, Susanne; Maksimov, Georgii M; Grigoriev, Mikhail N; Grosse, Guido (2020): Thermokarst Lake to Lagoon Transitions in Eastern Siberia: Do Submerged Taliks Refreeze? Journal of Geophysical Research-Earth Surface, 125(10), https://doi.org/10.1029/2019JF005424

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Abstract:
As the Arctic coast erodes, it drains thermokarst lakes, transforming them into lagoons, and, eventually, integrates them into subsea permafrost. Lagoons represent the first stage of a thermokarst lake transition to a marine setting and possibly more saline and colder upper boundary conditions. In this research, borehole data, electrical resistivity surveying, and modeling of heat and salt diffusion were carried out at Polar Fox Lagoon on the Bykovsky Peninsula, Siberia. Polar Fox Lagoon is a seasonally isolated water body connected to Tiksi Bay through a channel, leading to hypersaline waters under the ice cover. The boreholes in the center of the lagoon revealed floating ice and a saline cryotic bed underlain by a saline cryotic talik, a thin ice‐bearing permafrost layer, and unfrozen ground. The bathymetry showed that most of the lagoon had bedfast ice in spring. In bedfast ice areas, the electrical resistivity profiles suggested that an unfrozen saline layer was underlain by a thick layer of refrozen talik. The modeling showed that thermokarst lake taliks can refreeze when submerged in saltwater with mean annual bottom water temperatures below or slightly above 0°C. This occurs, because the top‐down chemical degradation of newly formed ice‐bearing permafrost is slower than the refreezing of the talik. Hence, lagoons may precondition taliks with a layer of ice‐bearing permafrost before encroachment by the sea, and this frozen layer may act as a cap on gas migration out of the underlying talik.
Keyword(s):
electrical resistivity; Permafrost; sediment; submarine; subsea; Temperature
Coverage:
Median Latitude: 71.743747 * Median Longitude: 129.337908 * South-bound Latitude: 71.728435 * West-bound Longitude: 129.313954 * North-bound Latitude: 71.752150 * East-bound Longitude: 129.348090
Date/Time Start: 2017-04-10T00:00:00 * Date/Time End: 2019-04-07T06:50:15
Size:
12 datasets

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Datasets listed in this publication series

  1. Angelopoulos, M; Overduin, PP; Westermann, S et al. (2019): Borehole temperature data profiles over depth in sediment core PG2411-1 in Polar Fox Lagoon. https://doi.org/10.1594/PANGAEA.907478
  2. Angelopoulos, M; Overduin, PP; Westermann, S et al. (2020): CryoGrid files for Polar Fox Lagoon. https://doi.org/10.1594/PANGAEA.922217
  3. Angelopoulos, M; Overduin, PP; Westermann, S et al. (2019): Electrical conductivity and temperature in the water column of Polar Fox Lagoon. https://doi.org/10.1594/PANGAEA.907475
  4. Angelopoulos, M; Overduin, PP; Westermann, S et al. (2019): Electrical resistivity tomography profiles collected in floating electrode mode from the lagoon's water surface, Profile A'-A. https://doi.org/10.1594/PANGAEA.907469
  5. Angelopoulos, M; Overduin, PP; Westermann, S et al. (2019): Electrical resistivity tomography profiles collected in floating electrode mode from the lagoon's water surface, Profile B-B'. https://doi.org/10.1594/PANGAEA.907470
  6. Angelopoulos, M; Overduin, PP; Westermann, S et al. (2019): Electrical resistivity tomography profiles collected in floating electrode mode from the lagoon's water surface, Profile C-C'. https://doi.org/10.1594/PANGAEA.907471
  7. Angelopoulos, M; Overduin, PP; Westermann, S et al. (2019): Electrical resistivity tomography profiles collected in floating electrode mode from the lagoon's water surface, Profile D-D'. https://doi.org/10.1594/PANGAEA.907472
  8. Angelopoulos, M; Overduin, PP; Westermann, S et al. (2019): Electrical resistivity tomography profiles collected in floating electrode mode from the lagoon's water surface, Profile E-E'. https://doi.org/10.1594/PANGAEA.907473
  9. Angelopoulos, M; Overduin, PP; Westermann, S et al. (2019): Electrical resistivity tomography profiles collected in floating electrode mode from the lagoon's water surface, Profile F-F'. https://doi.org/10.1594/PANGAEA.907474
  10. Angelopoulos, M; Overduin, PP; Westermann, S et al. (2019): Ice and snow thicknesses and water column depth at ten locations in Polar Fox Lagoon. https://doi.org/10.1594/PANGAEA.907476
  11. Angelopoulos, M; Overduin, PP; Westermann, S et al. (2019): Porewater electrical conductivity profiles over depth in the sediment from two boreholes in Polar Fox Lagoon and 1 borehole in Northern Polar Fox Lake. https://doi.org/10.1594/PANGAEA.907477
  12. Angelopoulos, M; Overduin, PP; Westermann, S et al. (2020): Raw temperature measurements at Polar Fox Lagoon. https://doi.org/10.1594/PANGAEA.922218