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Validation of T/P data in the South Indian Ocean

Claire Maraldi(1) , Laurent Testut(1) , Florence Birol(1) , and Laurent Roblou(2)

(1) LEGOS, 14 Av. Edouard Belin, 31400 Toulouse, France
(2) LA, 14 Av. Edouard Belin, 31400 Toulouse, France


The TOPEX / POSEIDON sea surface height data were compared with the in situ data of the ROSAME tide gauge network. This network is constituted by four real time costal stations: 3 are located in the South Indian ocean at Kerguelen, Crozet and Saint-Paul Islands and 1 is located in Antarctica at Dumont d' Urville. Moreover two moorings are maintained nearby the Islands of Amsterdam and Crozet. The TOPEX/POSEIDON altimetric data have been derived from GDRs using a new processing strategy developed for coastal zones applications. A particular attention was given to the tide and inverse barometer corrections using a high-resolution 2D finite element gravity waves model (MOG2D). The estimation of the altimetric sea level trend over the period 1992-2005 will be analysed and compared to the recent works made on historical trend observed at the Kerguelen tide gauge.



                 Last modified: 07.10.03