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An ERA40-based atmospheric forcing for global ocean circulation models ArchiMer
Brodeau, Laurent; Barnier, Bernard; Treguier, Anne-marie; Penduff, Thierry; Gulev, Sergei.
We develop, calibrate and test a dataset intended to drive global ocean hindcasts simulations of the last five decades. This dataset provides surface meteorological variables needed to estimate air-sea fluxes and is built from 6-hourly surface atmospheric state variables of ERA40. We first compare the raw fields of ERA40 to the CORE.v1 clataset of Large and Yeager (2004). used here as a reference, and discuss our choice to use daily radiative fluxes and monthly precipitation products extracted from satellite data rather than their ERA40 counterparts. Both datasets lead to excessively high global imbalances of heat and freshwater fluxes when tested with a prescribed climatological sea surface temperature. After identifying unrealistic time discontinuities...
Tipo: Text Palavras-chave: Ocean; Hindcast; Atmospheric forcing; Air sea fluxes; Weather reanalyzes; Satellite.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00000/11154/14032.pdf
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