Coastal polynyas in the western Weddell Sea
Coastal polynyas play a prominent role in the formation and modification of water masses in the polar oceans. A coastal polynya is usually kept open mechanically, primarily by winds, and the ocean surface is at freezing point. Thus a major fraction of the annual ice production of the high-latitude o...
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ftawi:oai:epic.awi.de:23203 2024-09-15T17:36:43+00:00 Coastal polynyas in the western Weddell Sea Haid, Verena Timmermann, Ralph 2010 https://epic.awi.de/id/eprint/23203/ https://hdl.handle.net/10013/epic.36011 unknown Haid, V. and Timmermann, R. (2010) Coastal polynyas in the western Weddell Sea , Geophysical Research Abstracts, Vol. 12, EGU . hdl:10013/epic.36011 EPIC3Geophysical Research Abstracts, Vol. 12, EGU, pp. 2010-5225 Conference notRev 2010 ftawi 2024-06-24T04:02:26Z Coastal polynyas play a prominent role in the formation and modification of water masses in the polar oceans. A coastal polynya is usually kept open mechanically, primarily by winds, and the ocean surface is at freezing point. Thus a major fraction of the annual ice production of the high-latitude oceans occurs in polynyas and hence the duration and extent of their appearance has a substantial effect on bottom water formation. In the western Weddell Sea, recurring coastal polynyas are formed in front of the Filchner-Ronne Ice Shelf and in the area of the decayed Larsen A/B Ice Shelf. Simulations to study polynya formation and their impact on ice production and bottom water formation in the western Weddell Sea were performed with the Finite Element Sea ice-Ocean Model (FESOM) of Alfred-Wegener-Institute (AWI). FESOM is a fully coupled system of a primitive-equation, hydrostatic ocean model and a dynamic-thermodynamic sea ice model. The simulations were conducted on a global grid with a resolution varying between roughly 300 km in tropical latitudes and <5 km along the coast of the southwestern Weddell Sea. In vertical direction, the grid uses terrain-following coordinates. The model results give insight into the mechanisms governing the formation of transient and persistent polynyas and their influence on ice production and deep water formation. Water mass formation and ice export rates are quantified and compared to observation-based estimates. Conference Object Alfred Wegener Institute Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Sea ice Weddell Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Coastal polynyas play a prominent role in the formation and modification of water masses in the polar oceans. A coastal polynya is usually kept open mechanically, primarily by winds, and the ocean surface is at freezing point. Thus a major fraction of the annual ice production of the high-latitude oceans occurs in polynyas and hence the duration and extent of their appearance has a substantial effect on bottom water formation. In the western Weddell Sea, recurring coastal polynyas are formed in front of the Filchner-Ronne Ice Shelf and in the area of the decayed Larsen A/B Ice Shelf. Simulations to study polynya formation and their impact on ice production and bottom water formation in the western Weddell Sea were performed with the Finite Element Sea ice-Ocean Model (FESOM) of Alfred-Wegener-Institute (AWI). FESOM is a fully coupled system of a primitive-equation, hydrostatic ocean model and a dynamic-thermodynamic sea ice model. The simulations were conducted on a global grid with a resolution varying between roughly 300 km in tropical latitudes and <5 km along the coast of the southwestern Weddell Sea. In vertical direction, the grid uses terrain-following coordinates. The model results give insight into the mechanisms governing the formation of transient and persistent polynyas and their influence on ice production and deep water formation. Water mass formation and ice export rates are quantified and compared to observation-based estimates. |
format |
Conference Object |
author |
Haid, Verena Timmermann, Ralph |
spellingShingle |
Haid, Verena Timmermann, Ralph Coastal polynyas in the western Weddell Sea |
author_facet |
Haid, Verena Timmermann, Ralph |
author_sort |
Haid, Verena |
title |
Coastal polynyas in the western Weddell Sea |
title_short |
Coastal polynyas in the western Weddell Sea |
title_full |
Coastal polynyas in the western Weddell Sea |
title_fullStr |
Coastal polynyas in the western Weddell Sea |
title_full_unstemmed |
Coastal polynyas in the western Weddell Sea |
title_sort |
coastal polynyas in the western weddell sea |
publishDate |
2010 |
url |
https://epic.awi.de/id/eprint/23203/ https://hdl.handle.net/10013/epic.36011 |
genre |
Alfred Wegener Institute Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Sea ice Weddell Sea |
genre_facet |
Alfred Wegener Institute Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Sea ice Weddell Sea |
op_source |
EPIC3Geophysical Research Abstracts, Vol. 12, EGU, pp. 2010-5225 |
op_relation |
Haid, V. and Timmermann, R. (2010) Coastal polynyas in the western Weddell Sea , Geophysical Research Abstracts, Vol. 12, EGU . hdl:10013/epic.36011 |
_version_ |
1810491580624142336 |