Validation of T/P data in the South Indian Ocean
Claire Maraldi(1) , Laurent Testut(1) , Florence Birol(1) , and Laurent Roblou(2)
14 Av. Edouard Belin,
(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.