| Registro completo |
| Provedor de dados: |
ArchiMer
|
| País: |
France
|
| Título: |
Strong winds in a coupled wave-atmosphere model during a North Atlantic storm event: evaluation against observations
|
| Autores: |
Pineau-guillou, Lucia
Ardhuin, Fabrice
Bouin, Marie-noelle
Redelsperger, Jean-luc
Chapron, Bertrand
Bidlot, Jean-raymond
Quilfen, Yves
|
| Data: |
2018-01
|
| Ano: |
2018
|
| Palavras-chave: |
Air-sea exchanges
Northeast Atlantic
Winds
IFS
Sea state
Roughness length
Drag coefficient
Wind stress
|
| Resumo: |
Strong winds may be biased in atmospheric models. Here the ECMWF coupled wave-atmosphere model is used (1) to evaluate strong winds against observations, (2) to test how alternative wind stress parameterizations could lead to a more accurate model. For the period of storms Kaat and Lilli (23 to 27 January 2014), we compared simulated winds with in-situ – moored buoys and platforms - and satellite observations available from the North Atlantic. Five wind stress parameterizations were evaluated. The first result is that moderate simulated winds (5-20 m s-1) match with all observations. However, for strong winds (above 20 m s-1), mean differences appear, as much as -7 m s-1 at 30 m s-1. Significant differences also exist between observations, with buoys and ASCAT-KNMI generally showing lower wind speeds than the platforms and other remote sensing data used in this study (AMSR2, ASCAT-RSS, WindSat, SMOS and JASON-2). It is difficult to conclude which dataset should be used as a reference. Even so, buoy and ASCAT-KNMI winds are likely to underestimate the real wind speed. The second result is that common wave-age dependent parameterizations produce unrealistic drags and are not appropriate for coupling, whereas a newly empirically-adjusted Charnock parameterization leads to higher winds compared to the default ECMWF parameterization. This proposed new parameterization may lead to more accurate results in an operational context.
|
| Tipo: |
Text
|
| Idioma: |
Inglês
|
| Identificador: |
https://archimer.ifremer.fr/doc/00410/52118/52826.pdf
DOI:10.1002/qj.3205
https://archimer.ifremer.fr/doc/00410/52118/
|
| Editor: |
Wiley
|
| Formato: |
application/pdf
|
| Fonte: |
Quarterly Journal Of The Royal Meteorological Society (0035-9009) (Wiley), 2018-01 , Vol. 144 , N. 711 Part.B , P. 317-332
|
| Direitos: |
2017 Royal Meteorological Society
info:eu-repo/semantics/openAccess
restricted use
|
|
