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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fttriple:oai:gotriple.eu:10670/1.1046de 2023-05-15T18:24:11+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 https://doi.org/10.1029/2020GL091187 https://archimer.ifremer.fr/doc/00668/77996/80217.pdf https://archimer.ifremer.fr/doc/00668/77996/83370.pdf https://archimer.ifremer.fr/doc/00668/77996/ en eng American Geophysical Union doi:10.1029/2020GL091187 10670/1.1046de https://archimer.ifremer.fr/doc/00668/77996/80217.pdf https://archimer.ifremer.fr/doc/00668/77996/83370.pdf https://archimer.ifremer.fr/doc/00668/77996/ other Archimer, archive institutionnelle de l'Ifremer Geophysical Research Letters (0094-8276) (American Geophysical Union), 2021-03 , Vol. 48 , N. 5 , P. e2020GL091187 (10p.) geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1029/2020GL091187 2023-01-22T18:12:48Z 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. Text Southern Ocean Unknown Pacific Southern Ocean Geophysical Research Letters 48 5 |
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geo envir 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 |
geo envir |
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 |
Text |
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 |
url |
https://doi.org/10.1029/2020GL091187 https://archimer.ifremer.fr/doc/00668/77996/80217.pdf https://archimer.ifremer.fr/doc/00668/77996/83370.pdf 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 |
Archimer, archive institutionnelle de l'Ifremer Geophysical Research Letters (0094-8276) (American Geophysical Union), 2021-03 , Vol. 48 , N. 5 , P. e2020GL091187 (10p.) |
op_relation |
doi:10.1029/2020GL091187 10670/1.1046de https://archimer.ifremer.fr/doc/00668/77996/80217.pdf https://archimer.ifremer.fr/doc/00668/77996/83370.pdf https://archimer.ifremer.fr/doc/00668/77996/ |
op_rights |
other |
op_doi |
https://doi.org/10.1029/2020GL091187 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
5 |
_version_ |
1766204520112586752 |