New directional wave satellite observations : Towards improved wave forecasts and climate description in Southern Ocean
In spite of continuous improvements of ocean wave models in the last decades, large errors still remain in particular under strongly forced conditions, often encountered in the Southern Ocean, where strong westerly winds generate some of the fiercest waves on Earth in almost unlimited fetch conditio...
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American Geophysical Union
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ftarchimer:oai:archimer.ifremer.fr:77996 2023-05-15T18:23:51+02:00 New directional wave satellite observations : Towards improved wave forecasts and climate description in Southern Ocean Aouf, L Hauser, D Chapron, Bertrand Toffoli, A Tourrain, C Peureux, Charles 2021-03 application/pdf https://archimer.ifremer.fr/doc/00668/77996/80217.pdf https://archimer.ifremer.fr/doc/00668/77996/83370.pdf https://doi.org/10.1029/2020GL091187 https://archimer.ifremer.fr/doc/00668/77996/ eng eng American Geophysical Union https://archimer.ifremer.fr/doc/00668/77996/80217.pdf https://archimer.ifremer.fr/doc/00668/77996/83370.pdf doi:10.1029/2020GL091187 https://archimer.ifremer.fr/doc/00668/77996/ info:eu-repo/semantics/openAccess restricted use Geophysical Research Letters (0094-8276) (American Geophysical Union), 2021-03 , Vol. 48 , N. 5 , P. e2020GL091187 (10p.) assimilation directional Southern Ocean SWH wave age wave number text Publication info:eu-repo/semantics/article 2021 ftarchimer https://doi.org/10.1029/2020GL091187 2021-09-23T20:36:39Z In spite of continuous improvements of ocean wave models in the last decades, large errors still remain in particular under strongly forced conditions, often encountered in the Southern Ocean, where strong westerly winds generate some of the fiercest waves on Earth in almost unlimited fetch conditions. The newly launched China‐France Oceanography SATellite (CFOSAT) provides directional spectra of ocean waves for both wind seas and swells. Compared to Synthetic Aperture Radar (SAR), it can resolve shorter wavelengths in all directions, which dominate in non‐fully developed wind waves. Here, the assimilation of these CFOSAT wave number components is proved to bring more accurate predictions of wave growth compared to the assimilation of significant wave height alone. A notable reduction of model bias is found in the Southern Ocean, especially in the Pacific Ocean sector. Results further exhibit a downward shift of the wave age, consistent with theoretical wave growth curves. Plain Language Summary This work focuses on the importance of using directional wave observations to improve model wave prediction in the Southern Ocean. The results indicate a significant impact on the transition from a wind‐dependent sea to a well‐developed sea. A direct consequence of this work will concern a better understanding of the wave climate in the Southern Ocean and therefore an improvement of coupled ocean/waves/atmosphere systems. Article in Journal/Newspaper Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Pacific Southern Ocean Geophysical Research Letters 48 5 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
assimilation directional Southern Ocean SWH wave age wave number |
spellingShingle |
assimilation directional Southern Ocean SWH wave age wave number Aouf, L Hauser, D Chapron, Bertrand Toffoli, A Tourrain, C Peureux, Charles New directional wave satellite observations : Towards improved wave forecasts and climate description in Southern Ocean |
topic_facet |
assimilation directional Southern Ocean SWH wave age wave number |
description |
In spite of continuous improvements of ocean wave models in the last decades, large errors still remain in particular under strongly forced conditions, often encountered in the Southern Ocean, where strong westerly winds generate some of the fiercest waves on Earth in almost unlimited fetch conditions. The newly launched China‐France Oceanography SATellite (CFOSAT) provides directional spectra of ocean waves for both wind seas and swells. Compared to Synthetic Aperture Radar (SAR), it can resolve shorter wavelengths in all directions, which dominate in non‐fully developed wind waves. Here, the assimilation of these CFOSAT wave number components is proved to bring more accurate predictions of wave growth compared to the assimilation of significant wave height alone. A notable reduction of model bias is found in the Southern Ocean, especially in the Pacific Ocean sector. Results further exhibit a downward shift of the wave age, consistent with theoretical wave growth curves. Plain Language Summary This work focuses on the importance of using directional wave observations to improve model wave prediction in the Southern Ocean. The results indicate a significant impact on the transition from a wind‐dependent sea to a well‐developed sea. A direct consequence of this work will concern a better understanding of the wave climate in the Southern Ocean and therefore an improvement of coupled ocean/waves/atmosphere systems. |
format |
Article in Journal/Newspaper |
author |
Aouf, L Hauser, D Chapron, Bertrand Toffoli, A Tourrain, C Peureux, Charles |
author_facet |
Aouf, L Hauser, D Chapron, Bertrand Toffoli, A Tourrain, C Peureux, Charles |
author_sort |
Aouf, L |
title |
New directional wave satellite observations : Towards improved wave forecasts and climate description in Southern Ocean |
title_short |
New directional wave satellite observations : Towards improved wave forecasts and climate description in Southern Ocean |
title_full |
New directional wave satellite observations : Towards improved wave forecasts and climate description in Southern Ocean |
title_fullStr |
New directional wave satellite observations : Towards improved wave forecasts and climate description in Southern Ocean |
title_full_unstemmed |
New directional wave satellite observations : Towards improved wave forecasts and climate description in Southern Ocean |
title_sort |
new directional wave satellite observations : towards improved wave forecasts and climate description in southern ocean |
publisher |
American Geophysical Union |
publishDate |
2021 |
url |
https://archimer.ifremer.fr/doc/00668/77996/80217.pdf https://archimer.ifremer.fr/doc/00668/77996/83370.pdf https://doi.org/10.1029/2020GL091187 https://archimer.ifremer.fr/doc/00668/77996/ |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Geophysical Research Letters (0094-8276) (American Geophysical Union), 2021-03 , Vol. 48 , N. 5 , P. e2020GL091187 (10p.) |
op_relation |
https://archimer.ifremer.fr/doc/00668/77996/80217.pdf https://archimer.ifremer.fr/doc/00668/77996/83370.pdf doi:10.1029/2020GL091187 https://archimer.ifremer.fr/doc/00668/77996/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2020GL091187 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
5 |
_version_ |
1766204008108654592 |