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| Oke, Peter R.; Balmaseda, Magdalena A.; Benkiran, Mounir; Cummings, James A.; Dombrowsky, Eric; Fujii, Yosuke; Guinehut, Stéphanie; Larnicol, Gilles; Le Traon, Pierre-yves; Martin, Matthew J.. |
| Global ocean forecast systems, developed under the Global Ocean Data Assimilation Experiment (GODAE), are a powerful means of assessing the impact of different components of the Global Ocean Observing System (GOOS). Using a range of analysis tools and approaches, GODAE systems are useful for quantifying the impact of different observation types on the quality of analyses and forecasts. This assessment includes both existing and future observation platforms. Many important conclusions can be drawn from these studies. It is clear that altimeter data are extremely important for constraining mesoscale variability in ocean forecast systems. The number of altimeters is also important. For example, near-real-time applications need data from four altimeters to... |
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| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6813.pdf |
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| Troccoli, Alberto; Balmaseda, Magdalena A.; Segschneider, Joachim; Vialard, Jerome; Anderson, David L. T.; Haines, Keith; Stockdale, Tim; Vitart, Frédéric; Fox, Alan D.. |
| This paper is an evaluation of the role of salinity in the framework of temperature data assimilation in a global ocean model that is used to initialize seasonal climate forecasts. It is shown that the univariate assimilation of temperature profiles, without attempting to correct salinity, can induce first-order errors in the subsurface temperature and salinity fields. A recently developed scheme by A. Troccoli and K. Haines is used to improve the salinity field. In this scheme, salinity increments are derived from the observed temperature, by using the model temperature and salinity profiles, assuming that the temperature-salinity relationship in the model profiles is preserved. In addition, the temperature and salinity fields are matched below the... |
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| Ano: 2002 |
URL: https://archimer.ifremer.fr/doc/00251/36272/34839.pdf |
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