Thermokarst Lake to Lagoon Transitions in Eastern Siberia: Do Submerged Taliks Refreeze?
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 t...
Published in: | Journal of Geophysical Research: Earth Surface |
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Online Access: | http://hdl.handle.net/10852/85798 http://urn.nb.no/URN:NBN:no-88451 https://doi.org/10.1029/2019JF005424 |
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ftoslouniv:oai:www.duo.uio.no:10852/85798 2023-05-15T15:10:10+02:00 Thermokarst Lake to Lagoon Transitions in Eastern Siberia: Do Submerged Taliks Refreeze? Angelopoulos, Michael Overduin, Pier Paul Westermann, Sebastian Tronicke, Jens 2021-03-24T12:04:21Z http://hdl.handle.net/10852/85798 http://urn.nb.no/URN:NBN:no-88451 https://doi.org/10.1029/2019JF005424 EN eng http://urn.nb.no/URN:NBN:no-88451 Angelopoulos, Michael Overduin, Pier Paul Westermann, Sebastian Tronicke, Jens . Thermokarst Lake to Lagoon Transitions in Eastern Siberia: Do Submerged Taliks Refreeze?. Journal of Geophysical Research (JGR): Earth Surface. 2020, 125(10) http://hdl.handle.net/10852/85798 1900589 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Geophysical Research (JGR): Earth Surface&rft.volume=125&rft.spage=&rft.date=2020 Journal of Geophysical Research (JGR): Earth Surface 125 10 https://doi.org/10.1029/2019JF005424 URN:NBN:no-88451 Fulltext https://www.duo.uio.no/bitstream/handle/10852/85798/2/2019JF005424.pdf Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 2169-9003 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2021 ftoslouniv https://doi.org/10.1029/2019JF005424 2021-05-05T22:31:00Z 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. Article in Journal/Newspaper Arctic Ice permafrost polar fox Thermokarst Tiksi Tiksi Bay Siberia Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Arctic Talik ENVELOPE(146.601,146.601,59.667,59.667) Tiksi ENVELOPE(128.867,128.867,71.633,71.633) Journal of Geophysical Research: Earth Surface 125 10 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Angelopoulos, Michael Overduin, Pier Paul Westermann, Sebastian Tronicke, Jens |
spellingShingle |
Angelopoulos, Michael Overduin, Pier Paul Westermann, Sebastian Tronicke, Jens Thermokarst Lake to Lagoon Transitions in Eastern Siberia: Do Submerged Taliks Refreeze? |
author_facet |
Angelopoulos, Michael Overduin, Pier Paul Westermann, Sebastian Tronicke, Jens |
author_sort |
Angelopoulos, Michael |
title |
Thermokarst Lake to Lagoon Transitions in Eastern Siberia: Do Submerged Taliks Refreeze? |
title_short |
Thermokarst Lake to Lagoon Transitions in Eastern Siberia: Do Submerged Taliks Refreeze? |
title_full |
Thermokarst Lake to Lagoon Transitions in Eastern Siberia: Do Submerged Taliks Refreeze? |
title_fullStr |
Thermokarst Lake to Lagoon Transitions in Eastern Siberia: Do Submerged Taliks Refreeze? |
title_full_unstemmed |
Thermokarst Lake to Lagoon Transitions in Eastern Siberia: Do Submerged Taliks Refreeze? |
title_sort |
thermokarst lake to lagoon transitions in eastern siberia: do submerged taliks refreeze? |
publishDate |
2021 |
url |
http://hdl.handle.net/10852/85798 http://urn.nb.no/URN:NBN:no-88451 https://doi.org/10.1029/2019JF005424 |
long_lat |
ENVELOPE(146.601,146.601,59.667,59.667) ENVELOPE(128.867,128.867,71.633,71.633) |
geographic |
Arctic Talik Tiksi |
geographic_facet |
Arctic Talik Tiksi |
genre |
Arctic Ice permafrost polar fox Thermokarst Tiksi Tiksi Bay Siberia |
genre_facet |
Arctic Ice permafrost polar fox Thermokarst Tiksi Tiksi Bay Siberia |
op_source |
2169-9003 |
op_relation |
http://urn.nb.no/URN:NBN:no-88451 Angelopoulos, Michael Overduin, Pier Paul Westermann, Sebastian Tronicke, Jens . Thermokarst Lake to Lagoon Transitions in Eastern Siberia: Do Submerged Taliks Refreeze?. Journal of Geophysical Research (JGR): Earth Surface. 2020, 125(10) http://hdl.handle.net/10852/85798 1900589 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Geophysical Research (JGR): Earth Surface&rft.volume=125&rft.spage=&rft.date=2020 Journal of Geophysical Research (JGR): Earth Surface 125 10 https://doi.org/10.1029/2019JF005424 URN:NBN:no-88451 Fulltext https://www.duo.uio.no/bitstream/handle/10852/85798/2/2019JF005424.pdf |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2019JF005424 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
125 |
container_issue |
10 |
_version_ |
1766341223950319616 |