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| Gourdeau, L; Arnault, S; Menard, Y; Merle, J. |
| We present preliminary results on Geosat altimetric data assimilation in a linear vertical mode model of the tropical Atlantic Ocean. The Kalman filter technique is used to assimilate altimetric data along one track at a time as the satellite over-flies the basin. Sensitivity and validation tests have been performed with simulated data. The results obtained with Geosat data are presented and compared on a monthly basis with objective analysis of altimetric data and oceanic general circulation model results. |
| Tipo: Text |
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| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00101/21181/18798.pdf |
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| Colin, C; Gonella, J; Merle, J. |
| The intensification of the South Equatorial Current at the surface and the corresponding decrease of the Equatorial Undercurrent below are associated on a seasonal time scale with a decrease of the temperature at and below the surface; the abrupt increase and decrease of the surface and subsurface currents in February-March 1983 lead, by geostrophic adjustment, to an uplift of the 20 degree C isotherm, contained within the thermocline, of 14 m. In October-November, the decrease of the equatorial undercurrent at 85 m depth induces by the same way a vertical displacement of the 17 degree C isotherm of 16 m. Vertical mixing takes place during the two cooling periods; maxima and vertical shear are found for both years in June-July between 10 and 35 m depths... |
| Tipo: Text |
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| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/00267/37845/35926.pdf |
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