Sensitivity of open-water ice growth and ice concentration evolution in a coupled atmosphere-ocean-sea ice model
A coupled atmosphere-ocean-sea ice model is applied to investigate to what degree the area-thickness distribution of new ice formed in open water affects the ice and ocean properties. Two sensitivity experiments are performed which modify the horizontal-to-vertical aspect ratio of open-water ice gro...
Published in: | Dynamics of Atmospheres and Oceans |
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Online Access: | https://epic.awi.de/id/eprint/45887/ https://doi.org/10.1016/j.dynatmoce.2017.05.003 https://hdl.handle.net/10013/epic.51984 |
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ftawi:oai:epic.awi.de:45887 2023-05-15T13:11:32+02:00 Sensitivity of open-water ice growth and ice concentration evolution in a coupled atmosphere-ocean-sea ice model Shi, Xiaoxu Lohmann, Gerrit 2017-09 https://epic.awi.de/id/eprint/45887/ https://doi.org/10.1016/j.dynatmoce.2017.05.003 https://hdl.handle.net/10013/epic.51984 unknown ELSEVIER SCIENCE BV Shi, X. orcid:0000-0001-7793-9639 and Lohmann, G. orcid:0000-0003-2089-733X (2017) Sensitivity of open-water ice growth and ice concentration evolution in a coupled atmosphere-ocean-sea ice model , Dynamics of Atmospheres and Oceans, 79 , pp. 10-30 . doi:10.1016/j.dynatmoce.2017.05.003 <https://doi.org/10.1016/j.dynatmoce.2017.05.003> , hdl:10013/epic.51984 EPIC3Dynamics of Atmospheres and Oceans, ELSEVIER SCIENCE BV, 79, pp. 10-30, ISSN: 0377-0265 Article isiRev 2017 ftawi https://doi.org/10.1016/j.dynatmoce.2017.05.003 2021-12-24T15:43:25Z A coupled atmosphere-ocean-sea ice model is applied to investigate to what degree the area-thickness distribution of new ice formed in open water affects the ice and ocean properties. Two sensitivity experiments are performed which modify the horizontal-to-vertical aspect ratio of open-water ice growth. The resulting changes in the Arctic sea-ice concentration strongly affect the surface albedo, the ocean heat release to the atmosphere, and the sea-ice production. The changes are further amplified through a positive feedback mechanism among the Arctic sea ice, the Atlantic Meridional Overturning Circulation (AMOC), and the surface air temperature in the Arctic, as the Fram Strait sea ice import influences the freshwater budget in the North Atlantic Ocean. Anomalies in sea-ice transport lead to changes in sea surface properties of the North Atlantic and the strength of AMOC. For the Southern Ocean, the most pronounced change is a warming along the Antarctic Circumpolar Current (ACC), owing to the interhemispheric bipolar seasaw linked to AMOC weakening. Another insight of this study lies on the improvement of our climate model. The ocean component FESOM is a newly developed ocean-sea ice model with an unstructured mesh and multi-resolution. We find that the subpolar sea-ice boundary in the Northern Hemisphere can be improved by tuning the process of open-water ice growth, which strongly influences the sea ice concentration in the marginal ice zone, the North Atlantic circulation, salinity and Arctic sea ice volume. Since the distribution of new ice on open water relies on many uncertain parameters and the knowledge of the detailed processes is currently too crude, it is a challenge to implement the processes realistically into models. Based on our sensitivity experiments, we conclude a pronounced uncertainty related to open-water sea ice growth which could significantly affect the climate system sensitivity. Article in Journal/Newspaper albedo Antarc* Antarctic Arctic Fram Strait North Atlantic Sea ice Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Arctic Southern Ocean The Antarctic Dynamics of Atmospheres and Oceans 79 10 30 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
A coupled atmosphere-ocean-sea ice model is applied to investigate to what degree the area-thickness distribution of new ice formed in open water affects the ice and ocean properties. Two sensitivity experiments are performed which modify the horizontal-to-vertical aspect ratio of open-water ice growth. The resulting changes in the Arctic sea-ice concentration strongly affect the surface albedo, the ocean heat release to the atmosphere, and the sea-ice production. The changes are further amplified through a positive feedback mechanism among the Arctic sea ice, the Atlantic Meridional Overturning Circulation (AMOC), and the surface air temperature in the Arctic, as the Fram Strait sea ice import influences the freshwater budget in the North Atlantic Ocean. Anomalies in sea-ice transport lead to changes in sea surface properties of the North Atlantic and the strength of AMOC. For the Southern Ocean, the most pronounced change is a warming along the Antarctic Circumpolar Current (ACC), owing to the interhemispheric bipolar seasaw linked to AMOC weakening. Another insight of this study lies on the improvement of our climate model. The ocean component FESOM is a newly developed ocean-sea ice model with an unstructured mesh and multi-resolution. We find that the subpolar sea-ice boundary in the Northern Hemisphere can be improved by tuning the process of open-water ice growth, which strongly influences the sea ice concentration in the marginal ice zone, the North Atlantic circulation, salinity and Arctic sea ice volume. Since the distribution of new ice on open water relies on many uncertain parameters and the knowledge of the detailed processes is currently too crude, it is a challenge to implement the processes realistically into models. Based on our sensitivity experiments, we conclude a pronounced uncertainty related to open-water sea ice growth which could significantly affect the climate system sensitivity. |
format |
Article in Journal/Newspaper |
author |
Shi, Xiaoxu Lohmann, Gerrit |
spellingShingle |
Shi, Xiaoxu Lohmann, Gerrit Sensitivity of open-water ice growth and ice concentration evolution in a coupled atmosphere-ocean-sea ice model |
author_facet |
Shi, Xiaoxu Lohmann, Gerrit |
author_sort |
Shi, Xiaoxu |
title |
Sensitivity of open-water ice growth and ice concentration evolution in a coupled atmosphere-ocean-sea ice model |
title_short |
Sensitivity of open-water ice growth and ice concentration evolution in a coupled atmosphere-ocean-sea ice model |
title_full |
Sensitivity of open-water ice growth and ice concentration evolution in a coupled atmosphere-ocean-sea ice model |
title_fullStr |
Sensitivity of open-water ice growth and ice concentration evolution in a coupled atmosphere-ocean-sea ice model |
title_full_unstemmed |
Sensitivity of open-water ice growth and ice concentration evolution in a coupled atmosphere-ocean-sea ice model |
title_sort |
sensitivity of open-water ice growth and ice concentration evolution in a coupled atmosphere-ocean-sea ice model |
publisher |
ELSEVIER SCIENCE BV |
publishDate |
2017 |
url |
https://epic.awi.de/id/eprint/45887/ https://doi.org/10.1016/j.dynatmoce.2017.05.003 https://hdl.handle.net/10013/epic.51984 |
geographic |
Antarctic Arctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Arctic Southern Ocean The Antarctic |
genre |
albedo Antarc* Antarctic Arctic Fram Strait North Atlantic Sea ice Southern Ocean |
genre_facet |
albedo Antarc* Antarctic Arctic Fram Strait North Atlantic Sea ice Southern Ocean |
op_source |
EPIC3Dynamics of Atmospheres and Oceans, ELSEVIER SCIENCE BV, 79, pp. 10-30, ISSN: 0377-0265 |
op_relation |
Shi, X. orcid:0000-0001-7793-9639 and Lohmann, G. orcid:0000-0003-2089-733X (2017) Sensitivity of open-water ice growth and ice concentration evolution in a coupled atmosphere-ocean-sea ice model , Dynamics of Atmospheres and Oceans, 79 , pp. 10-30 . doi:10.1016/j.dynatmoce.2017.05.003 <https://doi.org/10.1016/j.dynatmoce.2017.05.003> , hdl:10013/epic.51984 |
op_doi |
https://doi.org/10.1016/j.dynatmoce.2017.05.003 |
container_title |
Dynamics of Atmospheres and Oceans |
container_volume |
79 |
container_start_page |
10 |
op_container_end_page |
30 |
_version_ |
1766247873816559616 |