Landfast ice affects the stability of the Arctic halocline: Evidence from a numerical model
Landfast ice covers large surface areas of the winter Siberian Seas. The immobile landfast ice cover inhibits divergent and convergent motion, hence dynamical sea ice growth and redistribution, decouples winter river plumes in coastal seas from the atmosphere, and positions polynyas at the landfast...
Published in: | Journal of Geophysical Research: Oceans |
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ftawi:oai:epic.awi.de:38037 2024-09-15T17:51:22+00:00 Landfast ice affects the stability of the Arctic halocline: Evidence from a numerical model Itkin, Polona Losch, Martin Gerdes, Rüdiger 2015 application/pdf https://epic.awi.de/id/eprint/38037/ https://epic.awi.de/id/eprint/38037/1/itkin-etal_submitted.pdf https://doi.org/10.1002/2014JC010353 https://hdl.handle.net/10013/epic.45588 https://hdl.handle.net/10013/epic.45588.d001 unknown https://epic.awi.de/id/eprint/38037/1/itkin-etal_submitted.pdf https://hdl.handle.net/10013/epic.45588.d001 Itkin, P. , Losch, M. orcid:0000-0002-3824-5244 and Gerdes, R. (2015) Landfast ice affects the stability of the Arctic halocline: Evidence from a numerical model , Journal of Geophysical Research: Oceans, 120 (4), pp. 2622-2635 . doi:10.1002/2014JC010353 <https://doi.org/10.1002/2014JC010353> , hdl:10013/epic.45588 EPIC3Journal of Geophysical Research: Oceans, 120(4), pp. 2622-2635, ISSN: 21699275 Article isiRev 2015 ftawi https://doi.org/10.1002/2014JC010353 2024-06-24T04:12:21Z Landfast ice covers large surface areas of the winter Siberian Seas. The immobile landfast ice cover inhibits divergent and convergent motion, hence dynamical sea ice growth and redistribution, decouples winter river plumes in coastal seas from the atmosphere, and positions polynyas at the landfast ice edge offshore. In spite of the potentially large effects, state-of-the-art numerical models usually do not represent landfast ice in its correct extent. A simple parametrization of landfast ice based on bathymetry and internal sea ice strength is introduced and its effects on the simulated Arctic Ocean are demonstrated. The simulations suggest that the Siberian landfast ice impacts the Arctic halocline stability through enhanced brine production in polynyas located closer to the shelf break and by redirecting river water to the Canadian Basin. These processes strengthen the halocline in the Canadian Basin, but erode its stability in the Makarov and Eurasian Basins. Article in Journal/Newspaper Arctic Arctic Ocean Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Journal of Geophysical Research: Oceans 120 4 2622 2635 |
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 |
Landfast ice covers large surface areas of the winter Siberian Seas. The immobile landfast ice cover inhibits divergent and convergent motion, hence dynamical sea ice growth and redistribution, decouples winter river plumes in coastal seas from the atmosphere, and positions polynyas at the landfast ice edge offshore. In spite of the potentially large effects, state-of-the-art numerical models usually do not represent landfast ice in its correct extent. A simple parametrization of landfast ice based on bathymetry and internal sea ice strength is introduced and its effects on the simulated Arctic Ocean are demonstrated. The simulations suggest that the Siberian landfast ice impacts the Arctic halocline stability through enhanced brine production in polynyas located closer to the shelf break and by redirecting river water to the Canadian Basin. These processes strengthen the halocline in the Canadian Basin, but erode its stability in the Makarov and Eurasian Basins. |
format |
Article in Journal/Newspaper |
author |
Itkin, Polona Losch, Martin Gerdes, Rüdiger |
spellingShingle |
Itkin, Polona Losch, Martin Gerdes, Rüdiger Landfast ice affects the stability of the Arctic halocline: Evidence from a numerical model |
author_facet |
Itkin, Polona Losch, Martin Gerdes, Rüdiger |
author_sort |
Itkin, Polona |
title |
Landfast ice affects the stability of the Arctic halocline: Evidence from a numerical model |
title_short |
Landfast ice affects the stability of the Arctic halocline: Evidence from a numerical model |
title_full |
Landfast ice affects the stability of the Arctic halocline: Evidence from a numerical model |
title_fullStr |
Landfast ice affects the stability of the Arctic halocline: Evidence from a numerical model |
title_full_unstemmed |
Landfast ice affects the stability of the Arctic halocline: Evidence from a numerical model |
title_sort |
landfast ice affects the stability of the arctic halocline: evidence from a numerical model |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/38037/ https://epic.awi.de/id/eprint/38037/1/itkin-etal_submitted.pdf https://doi.org/10.1002/2014JC010353 https://hdl.handle.net/10013/epic.45588 https://hdl.handle.net/10013/epic.45588.d001 |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
EPIC3Journal of Geophysical Research: Oceans, 120(4), pp. 2622-2635, ISSN: 21699275 |
op_relation |
https://epic.awi.de/id/eprint/38037/1/itkin-etal_submitted.pdf https://hdl.handle.net/10013/epic.45588.d001 Itkin, P. , Losch, M. orcid:0000-0002-3824-5244 and Gerdes, R. (2015) Landfast ice affects the stability of the Arctic halocline: Evidence from a numerical model , Journal of Geophysical Research: Oceans, 120 (4), pp. 2622-2635 . doi:10.1002/2014JC010353 <https://doi.org/10.1002/2014JC010353> , hdl:10013/epic.45588 |
op_doi |
https://doi.org/10.1002/2014JC010353 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
4 |
container_start_page |
2622 |
op_container_end_page |
2635 |
_version_ |
1810293249277952000 |