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 th...
Published in: | Journal of Geophysical Research: Earth Surface |
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Online Access: | https://epic.awi.de/id/eprint/52757/ https://doi.org/10.1029/2019JF005424 https://hdl.handle.net/10013/epic.4ee87eca-f0ea-44f7-a687-b4c146f08883 |
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ftawi:oai:epic.awi.de:52757 2023-05-15T15:09:37+02:00 Thermokarst lake to lagoon transitions in eastern Siberia: Do submerged taliks refreeze? Angelopoulos, Michael Overduin, Paul Westermann, Sebastian Tronicke, Jens Strauss, Jens Schirrmeister, Lutz Biskaborn, Boris K. Liebner, Susanne Maximov, Georgii M. Grigoriev, Mikhail N. Grosse, Guido 2020-07 https://epic.awi.de/id/eprint/52757/ https://doi.org/10.1029/2019JF005424 https://hdl.handle.net/10013/epic.4ee87eca-f0ea-44f7-a687-b4c146f08883 unknown Wiley Angelopoulos, M. orcid:0000-0003-2574-5108 , Overduin, P. orcid:0000-0001-9849-4712 , Westermann, S. orcid:0000-0003-0514-4321 , Tronicke, J. , Strauss, J. orcid:0000-0003-4678-4982 , Schirrmeister, L. orcid:0000-0001-9455-0596 , Biskaborn, B. K. orcid:0000-0003-2378-0348 , Liebner, S. orcid:0000-0002-9389-7093 , Maximov, G. M. , Grigoriev, M. N. orcid:0000-0003-1997-9506 and Grosse, G. orcid:0000-0001-5895-2141 (2020) Thermokarst lake to lagoon transitions in eastern Siberia: Do submerged taliks refreeze? , Journal of Geophysical Research: Earth Surface . doi:10.1029/2019JF005424 <https://doi.org/10.1029/2019JF005424> , hdl:10013/epic.4ee87eca-f0ea-44f7-a687-b4c146f08883 info:eu-repo/semantics/openAccess EPIC3Journal of Geophysical Research: Earth Surface, Wiley, ISSN: 2169-9003 Article isiRev info:eu-repo/semantics/article 2020 ftawi https://doi.org/10.1029/2019JF005424 2022-03-14T00:09:43Z 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 modelling 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 centre 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 was ice‐grounded in spring. In bedfast ice areas, the electrical resistivity profiles suggest that an unfrozen saline layer was underlain by a thick layer of refrozen talik. The modelling suggests thermokarst lake taliks 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 cooling of the talik. Hence, lagoons may pre‐condition 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Tiksi ENVELOPE(128.867,128.867,71.633,71.633) Talik ENVELOPE(146.601,146.601,59.667,59.667) Journal of Geophysical Research: Earth Surface 125 10 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
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 modelling 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 centre 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 was ice‐grounded in spring. In bedfast ice areas, the electrical resistivity profiles suggest that an unfrozen saline layer was underlain by a thick layer of refrozen talik. The modelling suggests thermokarst lake taliks 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 cooling of the talik. Hence, lagoons may pre‐condition 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, Paul Westermann, Sebastian Tronicke, Jens Strauss, Jens Schirrmeister, Lutz Biskaborn, Boris K. Liebner, Susanne Maximov, Georgii M. Grigoriev, Mikhail N. Grosse, Guido |
spellingShingle |
Angelopoulos, Michael Overduin, Paul Westermann, Sebastian Tronicke, Jens Strauss, Jens Schirrmeister, Lutz Biskaborn, Boris K. Liebner, Susanne Maximov, Georgii M. Grigoriev, Mikhail N. Grosse, Guido Thermokarst lake to lagoon transitions in eastern Siberia: Do submerged taliks refreeze? |
author_facet |
Angelopoulos, Michael Overduin, Paul Westermann, Sebastian Tronicke, Jens Strauss, Jens Schirrmeister, Lutz Biskaborn, Boris K. Liebner, Susanne Maximov, Georgii M. Grigoriev, Mikhail N. Grosse, Guido |
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? |
publisher |
Wiley |
publishDate |
2020 |
url |
https://epic.awi.de/id/eprint/52757/ https://doi.org/10.1029/2019JF005424 https://hdl.handle.net/10013/epic.4ee87eca-f0ea-44f7-a687-b4c146f08883 |
long_lat |
ENVELOPE(128.867,128.867,71.633,71.633) ENVELOPE(146.601,146.601,59.667,59.667) |
geographic |
Arctic Tiksi Talik |
geographic_facet |
Arctic Tiksi Talik |
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 |
EPIC3Journal of Geophysical Research: Earth Surface, Wiley, ISSN: 2169-9003 |
op_relation |
Angelopoulos, M. orcid:0000-0003-2574-5108 , Overduin, P. orcid:0000-0001-9849-4712 , Westermann, S. orcid:0000-0003-0514-4321 , Tronicke, J. , Strauss, J. orcid:0000-0003-4678-4982 , Schirrmeister, L. orcid:0000-0001-9455-0596 , Biskaborn, B. K. orcid:0000-0003-2378-0348 , Liebner, S. orcid:0000-0002-9389-7093 , Maximov, G. M. , Grigoriev, M. N. orcid:0000-0003-1997-9506 and Grosse, G. orcid:0000-0001-5895-2141 (2020) Thermokarst lake to lagoon transitions in eastern Siberia: Do submerged taliks refreeze? , Journal of Geophysical Research: Earth Surface . doi:10.1029/2019JF005424 <https://doi.org/10.1029/2019JF005424> , hdl:10013/epic.4ee87eca-f0ea-44f7-a687-b4c146f08883 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2019JF005424 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
125 |
container_issue |
10 |
_version_ |
1766340773007065088 |