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The impact of satellite winds and latent heat fluxes in a numerical simulation of the tropical Pacific Ocean

The impact of satellite winds and latent heat fluxes in a numerical simulation of the tropical Pacific Ocean
The impact of satellite winds and latent heat fluxes in a numerical simulation of the tropical Pacific Ocean
Several oceanic operational programs use remotely sensed fluxes to complement atmospheric operational analyses from major national weather prediction centers. The main goal of this study is to evaluate the ability of the ocean model (ORCA) to correctly simulate the dynamic of the tropical Pacific Ocean in 1996–98 when forced by the satellite turbulent fluxes (wind stress and latent heat fluxes). The results are compared with the oceanic response resulting from forcing the model with the European Centre for Medium-Range Weather Forecasts (ECMWF) operational analysis. Three sensitivity simulations forced with satellite and atmospheric analysis fields are performed. The control experiment is forced with the ECMWF fluxes. The solutions of these simulations are compared with data from the Tropical Atmosphere–Ocean (TAO) buoys and from sea surface temperatures analysis by Reynolds and Smith in the equatorial Pacific Ocean. The analysis results indicate that the model reproduces well the major spatial and temporal oceanic structures including the main characteristics of the 1997–98 El Niño. More specifically, the comparisons with buoys indicate that the experiment forced by the winds and the satellite latent heat fluxes is closer to the observations. They provide weak rms difference and strong correlations along the whole 500-m depth column. Furthermore, the correlations with the SST analysis vary between 75% and 95% compared to 65% and 77% for the experiment forced by ECMWF fluxes. The currents in the first 350 m also show a strong sensitivity to satellite turbulent fluxes.
0894-8755
5889-5902
Ayina, Ludos-Herve
0cb19780-3c6a-4061-874e-2607c295a9d2
Bentamy, Abderrahim
71dfff74-d7ba-462b-8a00-473c966e7527
Mestas-Nuñez, Alberto M.
1ef57a1a-05f3-4680-aeb1-c16f24e8e964
Madec, Gurvan
ffb28deb-4bbd-4a4c-914f-492f813e4864
Ayina, Ludos-Herve
0cb19780-3c6a-4061-874e-2607c295a9d2
Bentamy, Abderrahim
71dfff74-d7ba-462b-8a00-473c966e7527
Mestas-Nuñez, Alberto M.
1ef57a1a-05f3-4680-aeb1-c16f24e8e964
Madec, Gurvan
ffb28deb-4bbd-4a4c-914f-492f813e4864

Ayina, Ludos-Herve, Bentamy, Abderrahim, Mestas-Nuñez, Alberto M. and Madec, Gurvan (2006) The impact of satellite winds and latent heat fluxes in a numerical simulation of the tropical Pacific Ocean. Journal of Climate, 19 (22), 5889-5902. (doi:10.1175/JCLI3939.1).

Record type: Article

Abstract

Several oceanic operational programs use remotely sensed fluxes to complement atmospheric operational analyses from major national weather prediction centers. The main goal of this study is to evaluate the ability of the ocean model (ORCA) to correctly simulate the dynamic of the tropical Pacific Ocean in 1996–98 when forced by the satellite turbulent fluxes (wind stress and latent heat fluxes). The results are compared with the oceanic response resulting from forcing the model with the European Centre for Medium-Range Weather Forecasts (ECMWF) operational analysis. Three sensitivity simulations forced with satellite and atmospheric analysis fields are performed. The control experiment is forced with the ECMWF fluxes. The solutions of these simulations are compared with data from the Tropical Atmosphere–Ocean (TAO) buoys and from sea surface temperatures analysis by Reynolds and Smith in the equatorial Pacific Ocean. The analysis results indicate that the model reproduces well the major spatial and temporal oceanic structures including the main characteristics of the 1997–98 El Niño. More specifically, the comparisons with buoys indicate that the experiment forced by the winds and the satellite latent heat fluxes is closer to the observations. They provide weak rms difference and strong correlations along the whole 500-m depth column. Furthermore, the correlations with the SST analysis vary between 75% and 95% compared to 65% and 77% for the experiment forced by ECMWF fluxes. The currents in the first 350 m also show a strong sensitivity to satellite turbulent fluxes.

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Published date: November 2006

Identifiers

Local EPrints ID: 64347
URI: http://eprints.soton.ac.uk/id/eprint/64347
ISSN: 0894-8755
PURE UUID: e770b8cb-d7af-4f85-bc45-19491294b9d1

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Date deposited: 10 Dec 2008
Last modified: 13 Mar 2019 20:22

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Author: Ludos-Herve Ayina
Author: Abderrahim Bentamy
Author: Alberto M. Mestas-Nuñez
Author: Gurvan Madec

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