Heat and salt flow in subsea permafrost modeled with CryoGRID2
Thawing of subsea permafrost can impact offshore infrastructure, affect coastal erosion, and release permafrost organic matter. Thawing is usually modeled as the result of heat transfer, although salt diffusion may play an important role in marine settings. To better quantify nearshore subsea permaf...
Published in: | Journal of Geophysical Research: Earth Surface |
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Online Access: | https://epic.awi.de/id/eprint/49564/ https://epic.awi.de/id/eprint/49564/1/Angelopoulos_et_al_2019_JGR.pdf https://hdl.handle.net/10013/epic.1ea214bb-e00e-45a9-a603-be78ade053d8 |
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ftawi:oai:epic.awi.de:49564 2024-09-15T18:11:22+00:00 Heat and salt flow in subsea permafrost modeled with CryoGRID2 Angelopoulos, Michael Westermann, Sebastian Overduin, Paul Faguet, Alexey Olenchenko, Vladimir Grosse, Guido Grigoriev, M. N. 2019-04-06 application/pdf https://epic.awi.de/id/eprint/49564/ https://epic.awi.de/id/eprint/49564/1/Angelopoulos_et_al_2019_JGR.pdf https://hdl.handle.net/10013/epic.1ea214bb-e00e-45a9-a603-be78ade053d8 unknown Wiley https://epic.awi.de/id/eprint/49564/1/Angelopoulos_et_al_2019_JGR.pdf Angelopoulos, M. orcid:0000-0003-2574-5108 , Westermann, S. orcid:0000-0003-0514-4321 , Overduin, P. orcid:0000-0001-9849-4712 , Faguet, A. , Olenchenko, V. orcid:0000-0002-4386-7064 , Grosse, G. orcid:0000-0001-5895-2141 and Grigoriev, M. N. orcid:0000-0003-1997-9506 (2019) Heat and salt flow in subsea permafrost modeled with CryoGRID2 , Journal of Geophysical Research-Earth Surface, 124 (4), pp. 920-937 . doi:10.1029/2018JF004823 <https://doi.org/10.1029/2018JF004823> , hdl:10013/epic.1ea214bb-e00e-45a9-a603-be78ade053d8 info:eu-repo/semantics/openAccess EPIC3Journal of Geophysical Research-Earth Surface, Wiley, 124(4), pp. 920-937, ISSN: 0148-0227 Article isiRev info:eu-repo/semantics/article 2019 ftawi https://doi.org/10.1029/2018JF004823 2024-06-24T04:22:11Z Thawing of subsea permafrost can impact offshore infrastructure, affect coastal erosion, and release permafrost organic matter. Thawing is usually modeled as the result of heat transfer, although salt diffusion may play an important role in marine settings. To better quantify nearshore subsea permafrost thawing, we applied the CryoGRID2 heat diffusion model and coupled it to a salt diffusion model. We simulated coastline retreat and subsea permafrost evolution as it develops through successive stages of a thawing sequence at the Bykovsky Peninsula, Siberia. Sensitivity analyses for seawater salinity were performed to compare the results for the Bykovsky Peninsula with those of typical Arctic seawater. For the Bykovsky Peninsula, the modeled ice‐bearing permafrost table (IBPT) for ice‐rich sand and an erosion rate of 0.25 m/year was 16.7 m below the seabed 350 m offshore. The model outputs were compared to the IBPT depth estimated from coastline retreat and electrical resistivity surveys perpendicular to and crossing the shoreline of the Bykovsky Peninsula. The interpreted geoelectric data suggest that the IBPT dipped to 15–20 m below the seabed at 350 m offshore. Both results suggest that cold saline water forms beneath grounded ice and floating sea ice in shallow water, causing cryotic benthic temperatures. The freezing point depression produced by salt diffusion can delay or prevent ice formation in the sediment and enhance the IBPT degradation rate. Therefore, salt diffusion may facilitate the release of greenhouse gasses to the atmosphere and considerably affect the design of offshore and coastal infrastructure in subsea permafrost areas. Article in Journal/Newspaper Ice permafrost Sea ice Siberia Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Journal of Geophysical Research: Earth Surface 124 4 920 937 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Thawing of subsea permafrost can impact offshore infrastructure, affect coastal erosion, and release permafrost organic matter. Thawing is usually modeled as the result of heat transfer, although salt diffusion may play an important role in marine settings. To better quantify nearshore subsea permafrost thawing, we applied the CryoGRID2 heat diffusion model and coupled it to a salt diffusion model. We simulated coastline retreat and subsea permafrost evolution as it develops through successive stages of a thawing sequence at the Bykovsky Peninsula, Siberia. Sensitivity analyses for seawater salinity were performed to compare the results for the Bykovsky Peninsula with those of typical Arctic seawater. For the Bykovsky Peninsula, the modeled ice‐bearing permafrost table (IBPT) for ice‐rich sand and an erosion rate of 0.25 m/year was 16.7 m below the seabed 350 m offshore. The model outputs were compared to the IBPT depth estimated from coastline retreat and electrical resistivity surveys perpendicular to and crossing the shoreline of the Bykovsky Peninsula. The interpreted geoelectric data suggest that the IBPT dipped to 15–20 m below the seabed at 350 m offshore. Both results suggest that cold saline water forms beneath grounded ice and floating sea ice in shallow water, causing cryotic benthic temperatures. The freezing point depression produced by salt diffusion can delay or prevent ice formation in the sediment and enhance the IBPT degradation rate. Therefore, salt diffusion may facilitate the release of greenhouse gasses to the atmosphere and considerably affect the design of offshore and coastal infrastructure in subsea permafrost areas. |
format |
Article in Journal/Newspaper |
author |
Angelopoulos, Michael Westermann, Sebastian Overduin, Paul Faguet, Alexey Olenchenko, Vladimir Grosse, Guido Grigoriev, M. N. |
spellingShingle |
Angelopoulos, Michael Westermann, Sebastian Overduin, Paul Faguet, Alexey Olenchenko, Vladimir Grosse, Guido Grigoriev, M. N. Heat and salt flow in subsea permafrost modeled with CryoGRID2 |
author_facet |
Angelopoulos, Michael Westermann, Sebastian Overduin, Paul Faguet, Alexey Olenchenko, Vladimir Grosse, Guido Grigoriev, M. N. |
author_sort |
Angelopoulos, Michael |
title |
Heat and salt flow in subsea permafrost modeled with CryoGRID2 |
title_short |
Heat and salt flow in subsea permafrost modeled with CryoGRID2 |
title_full |
Heat and salt flow in subsea permafrost modeled with CryoGRID2 |
title_fullStr |
Heat and salt flow in subsea permafrost modeled with CryoGRID2 |
title_full_unstemmed |
Heat and salt flow in subsea permafrost modeled with CryoGRID2 |
title_sort |
heat and salt flow in subsea permafrost modeled with cryogrid2 |
publisher |
Wiley |
publishDate |
2019 |
url |
https://epic.awi.de/id/eprint/49564/ https://epic.awi.de/id/eprint/49564/1/Angelopoulos_et_al_2019_JGR.pdf https://hdl.handle.net/10013/epic.1ea214bb-e00e-45a9-a603-be78ade053d8 |
genre |
Ice permafrost Sea ice Siberia |
genre_facet |
Ice permafrost Sea ice Siberia |
op_source |
EPIC3Journal of Geophysical Research-Earth Surface, Wiley, 124(4), pp. 920-937, ISSN: 0148-0227 |
op_relation |
https://epic.awi.de/id/eprint/49564/1/Angelopoulos_et_al_2019_JGR.pdf Angelopoulos, M. orcid:0000-0003-2574-5108 , Westermann, S. orcid:0000-0003-0514-4321 , Overduin, P. orcid:0000-0001-9849-4712 , Faguet, A. , Olenchenko, V. orcid:0000-0002-4386-7064 , Grosse, G. orcid:0000-0001-5895-2141 and Grigoriev, M. N. orcid:0000-0003-1997-9506 (2019) Heat and salt flow in subsea permafrost modeled with CryoGRID2 , Journal of Geophysical Research-Earth Surface, 124 (4), pp. 920-937 . doi:10.1029/2018JF004823 <https://doi.org/10.1029/2018JF004823> , hdl:10013/epic.1ea214bb-e00e-45a9-a603-be78ade053d8 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2018JF004823 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
124 |
container_issue |
4 |
container_start_page |
920 |
op_container_end_page |
937 |
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1810448955440365568 |