Patterns of wintertime Arctic sea-ice leads and their relation to winds and ocean currents
We use a novel sea-ice lead climatology for the winters of 2002/03 to 2020/21 based on satellite observations with 1 km2 spatial resolution to identify predominant patterns in Arctic wintertime sea-ice leads. The causes for the observed spatial and temporal variabilities are investigated using ocean...
Published in: | The Cryosphere |
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2023
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Online Access: | https://ubt.opus.hbz-nrw.de/frontdoor/index/index/docId/2110 https://nbn-resolving.org/urn:nbn:de:hbz:385-1-21105 https://doi.org/10.5194/tc-17-3291-2023 https://ubt.opus.hbz-nrw.de/files/2110/tc-17-3291-2023.pdf |
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ftunivtrier:oai:ubt.opus.hbz-nrw.de:2110 2024-02-04T09:57:45+01:00 Patterns of wintertime Arctic sea-ice leads and their relation to winds and ocean currents Willmes, Sascha Heinemann, Günther Schnaase, Frank The publication was funded by the Open Access Fund of Universität Trier and the German Research Foundation (DFG) 2023-08-17 application/pdf https://ubt.opus.hbz-nrw.de/frontdoor/index/index/docId/2110 https://nbn-resolving.org/urn:nbn:de:hbz:385-1-21105 https://doi.org/10.5194/tc-17-3291-2023 https://ubt.opus.hbz-nrw.de/files/2110/tc-17-3291-2023.pdf eng eng https://ubt.opus.hbz-nrw.de/frontdoor/index/index/docId/2110 urn:nbn:de:hbz:385-1-21105 doi:10.5194/tc-17-3291-2023 https://ubt.opus.hbz-nrw.de/files/2110/tc-17-3291-2023.pdf https://creativecommons.org/licenses/by/4.0/deed.de info:eu-repo/semantics/openAccess Arktis 4002924-4 Satellitenfernerkundung 4224344-0 Meereis 4131349-5 Bruch 4130868-2 Meeresströmung 4130725-2 Wind 4066257-3 Klima 4031170-3 Geologie Hydrologie Meteorologie ddc:551 article doc-type:article 2023 ftunivtrier https://doi.org/10.5194/tc-17-3291-2023 2024-01-07T23:34:50Z We use a novel sea-ice lead climatology for the winters of 2002/03 to 2020/21 based on satellite observations with 1 km2 spatial resolution to identify predominant patterns in Arctic wintertime sea-ice leads. The causes for the observed spatial and temporal variabilities are investigated using ocean surface current velocities and eddy kinetic energies from an ocean model (Finite Element Sea Ice–Ice-Shelf–Ocean Model, FESOM) and winds from a regional climate model (CCLM) and ERA5 reanalysis, respectively. The presented investigation provides evidence for an influence of ocean bathymetry and associated currents on the mechanic weakening of sea ice and the accompanying occurrence of sea-ice leads with their characteristic spatial patterns. While the driving mechanisms for this observation are not yet understood in detail, the presented results can contribute to opening new hypotheses on ocean–sea-ice interactions. The individual contribution of ocean and atmosphere to regional lead dynamics is complex, and a deeper insight requires detailed mechanistic investigations in combination with considerations of coastal geometries. While the ocean influence on lead dynamics seems to act on a rather long-term scale (seasonal to interannual), the influence of wind appears to trigger sea-ice lead dynamics on shorter timescales of weeks to months and is largely controlled by individual events causing increased divergence. No significant pan-Arctic trends in wintertime leads can be observed. Article in Journal/Newspaper Arctic Arktis Arktis* Ice Shelf Sea ice Publication Server of Tier University (OPUS) Arctic The Cryosphere 17 8 3291 3308 |
institution |
Open Polar |
collection |
Publication Server of Tier University (OPUS) |
op_collection_id |
ftunivtrier |
language |
English |
topic |
Arktis 4002924-4 Satellitenfernerkundung 4224344-0 Meereis 4131349-5 Bruch 4130868-2 Meeresströmung 4130725-2 Wind 4066257-3 Klima 4031170-3 Geologie Hydrologie Meteorologie ddc:551 |
spellingShingle |
Arktis 4002924-4 Satellitenfernerkundung 4224344-0 Meereis 4131349-5 Bruch 4130868-2 Meeresströmung 4130725-2 Wind 4066257-3 Klima 4031170-3 Geologie Hydrologie Meteorologie ddc:551 Willmes, Sascha Heinemann, Günther Schnaase, Frank Patterns of wintertime Arctic sea-ice leads and their relation to winds and ocean currents |
topic_facet |
Arktis 4002924-4 Satellitenfernerkundung 4224344-0 Meereis 4131349-5 Bruch 4130868-2 Meeresströmung 4130725-2 Wind 4066257-3 Klima 4031170-3 Geologie Hydrologie Meteorologie ddc:551 |
description |
We use a novel sea-ice lead climatology for the winters of 2002/03 to 2020/21 based on satellite observations with 1 km2 spatial resolution to identify predominant patterns in Arctic wintertime sea-ice leads. The causes for the observed spatial and temporal variabilities are investigated using ocean surface current velocities and eddy kinetic energies from an ocean model (Finite Element Sea Ice–Ice-Shelf–Ocean Model, FESOM) and winds from a regional climate model (CCLM) and ERA5 reanalysis, respectively. The presented investigation provides evidence for an influence of ocean bathymetry and associated currents on the mechanic weakening of sea ice and the accompanying occurrence of sea-ice leads with their characteristic spatial patterns. While the driving mechanisms for this observation are not yet understood in detail, the presented results can contribute to opening new hypotheses on ocean–sea-ice interactions. The individual contribution of ocean and atmosphere to regional lead dynamics is complex, and a deeper insight requires detailed mechanistic investigations in combination with considerations of coastal geometries. While the ocean influence on lead dynamics seems to act on a rather long-term scale (seasonal to interannual), the influence of wind appears to trigger sea-ice lead dynamics on shorter timescales of weeks to months and is largely controlled by individual events causing increased divergence. No significant pan-Arctic trends in wintertime leads can be observed. |
author2 |
The publication was funded by the Open Access Fund of Universität Trier and the German Research Foundation (DFG) |
format |
Article in Journal/Newspaper |
author |
Willmes, Sascha Heinemann, Günther Schnaase, Frank |
author_facet |
Willmes, Sascha Heinemann, Günther Schnaase, Frank |
author_sort |
Willmes, Sascha |
title |
Patterns of wintertime Arctic sea-ice leads and their relation to winds and ocean currents |
title_short |
Patterns of wintertime Arctic sea-ice leads and their relation to winds and ocean currents |
title_full |
Patterns of wintertime Arctic sea-ice leads and their relation to winds and ocean currents |
title_fullStr |
Patterns of wintertime Arctic sea-ice leads and their relation to winds and ocean currents |
title_full_unstemmed |
Patterns of wintertime Arctic sea-ice leads and their relation to winds and ocean currents |
title_sort |
patterns of wintertime arctic sea-ice leads and their relation to winds and ocean currents |
publishDate |
2023 |
url |
https://ubt.opus.hbz-nrw.de/frontdoor/index/index/docId/2110 https://nbn-resolving.org/urn:nbn:de:hbz:385-1-21105 https://doi.org/10.5194/tc-17-3291-2023 https://ubt.opus.hbz-nrw.de/files/2110/tc-17-3291-2023.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arktis Arktis* Ice Shelf Sea ice |
genre_facet |
Arctic Arktis Arktis* Ice Shelf Sea ice |
op_relation |
https://ubt.opus.hbz-nrw.de/frontdoor/index/index/docId/2110 urn:nbn:de:hbz:385-1-21105 doi:10.5194/tc-17-3291-2023 https://ubt.opus.hbz-nrw.de/files/2110/tc-17-3291-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/deed.de info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-17-3291-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
8 |
container_start_page |
3291 |
op_container_end_page |
3308 |
_version_ |
1789962075377762304 |