Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results
This study deals with observations and simulations of the evolution of coastal polynias focusing on the Ronne Polynia. We compare differences in polynia extent and ice drift patterns derived from satellite radar images and from simulations with the Finite Element Sea Ice Ocean Model, employing three...
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Online Access: | https://epic.awi.de/id/eprint/32859/ https://hdl.handle.net/10013/epic.41399 |
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ftawi:oai:epic.awi.de:32859 2023-05-15T13:40:26+02:00 Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results Hollands, Thomas Haid, Verena Dierking, Wolfgang Timmermann, Ralph Ebner, Lars 2013 https://epic.awi.de/id/eprint/32859/ https://hdl.handle.net/10013/epic.41399 unknown AMER GEOPHYSICAL UNION Hollands, T. orcid:0000-0003-0824-4037 , Haid, V. , Dierking, W. orcid:0000-0002-5031-648X , Timmermann, R. and Ebner, L. (2013) Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results , Journal of Geophysical Research-Oceans, 118 . hdl:10013/epic.41399 EPIC3Journal of Geophysical Research-Oceans, AMER GEOPHYSICAL UNION, 118, ISSN: 0148-0227 Article isiRev 2013 ftawi 2021-12-24T15:38:37Z This study deals with observations and simulations of the evolution of coastal polynias focusing on the Ronne Polynia. We compare differences in polynia extent and ice drift patterns derived from satellite radar images and from simulations with the Finite Element Sea Ice Ocean Model, employing three atmospheric forcing data sets that differ in spatial and temporal resolution. Two polynia events are analyzed, one from austral summer and one from late fall 2008. The open water area in the polynia is of similar size in the satellite images and in the model simulations, but its temporal evolution differs depending on katabatic winds being resolved in the atmospheric forcing data sets. Modeled ice drift is slower than the observed and reveals greater turning angles relative to the wind direction in many cases. For the summer event, model results obtained with high-resolution forcing are closer to the drift field derived from radar imagery than those from coarse resolution forcing. For the late fall event, none of the forcing data yields outstanding results. Our study demonstrates that a dense (1–3 km) model grid and atmospheric forcing provided at high spatial resolution ( < 50 km) are critical to correctly simulate coastal polynias with a coupled sea-ice ocean model. Article in Journal/Newspaper Antarc* Antarctica Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Austral |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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description |
This study deals with observations and simulations of the evolution of coastal polynias focusing on the Ronne Polynia. We compare differences in polynia extent and ice drift patterns derived from satellite radar images and from simulations with the Finite Element Sea Ice Ocean Model, employing three atmospheric forcing data sets that differ in spatial and temporal resolution. Two polynia events are analyzed, one from austral summer and one from late fall 2008. The open water area in the polynia is of similar size in the satellite images and in the model simulations, but its temporal evolution differs depending on katabatic winds being resolved in the atmospheric forcing data sets. Modeled ice drift is slower than the observed and reveals greater turning angles relative to the wind direction in many cases. For the summer event, model results obtained with high-resolution forcing are closer to the drift field derived from radar imagery than those from coarse resolution forcing. For the late fall event, none of the forcing data yields outstanding results. Our study demonstrates that a dense (1–3 km) model grid and atmospheric forcing provided at high spatial resolution ( < 50 km) are critical to correctly simulate coastal polynias with a coupled sea-ice ocean model. |
format |
Article in Journal/Newspaper |
author |
Hollands, Thomas Haid, Verena Dierking, Wolfgang Timmermann, Ralph Ebner, Lars |
spellingShingle |
Hollands, Thomas Haid, Verena Dierking, Wolfgang Timmermann, Ralph Ebner, Lars Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results |
author_facet |
Hollands, Thomas Haid, Verena Dierking, Wolfgang Timmermann, Ralph Ebner, Lars |
author_sort |
Hollands, Thomas |
title |
Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results |
title_short |
Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results |
title_full |
Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results |
title_fullStr |
Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results |
title_full_unstemmed |
Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results |
title_sort |
sea ice motion and open water area at the ronne polynia, antarctica: synthetic aperture radar observations versus model results |
publisher |
AMER GEOPHYSICAL UNION |
publishDate |
2013 |
url |
https://epic.awi.de/id/eprint/32859/ https://hdl.handle.net/10013/epic.41399 |
geographic |
Austral |
geographic_facet |
Austral |
genre |
Antarc* Antarctica Sea ice |
genre_facet |
Antarc* Antarctica Sea ice |
op_source |
EPIC3Journal of Geophysical Research-Oceans, AMER GEOPHYSICAL UNION, 118, ISSN: 0148-0227 |
op_relation |
Hollands, T. orcid:0000-0003-0824-4037 , Haid, V. , Dierking, W. orcid:0000-0002-5031-648X , Timmermann, R. and Ebner, L. (2013) Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results , Journal of Geophysical Research-Oceans, 118 . hdl:10013/epic.41399 |
_version_ |
1766133449669738496 |