Comparison of TOPEX/Poseidon and Jason Altimetry with ARAMIS In Situ Observations in the Tropical Atlantic Ocean

Autor: D. Diverrès, Sabine Arnault, N. Chouaib, S. Jacquin, O. Coze
Rok vydání: 2004
Předmět:
Zdroj: Marine Geodesy. 27:15-30
ISSN: 1521-060X
0149-0419
Popis: Low frequency variability in the tropical Atlantic is complex and hard to witness due to the weakness of this signal compared to the dominant seasonal one. TOPEX/Poseidon and Jason provide a new tool to enlighten these topics by offering more than 10 years of continuous altimetric series. In the tropical regions, due to the vanishing of the Coriolis parameter, uncertainties of a few centimeters in sea level can result in large errors on geostrophic velocity which will propagate rapidly over the entire basin. Accuracy is then a crucial problem for these areas. The ARAMIS program (Altimetrie sur un Rail Atlantique et Mesures In Situ) has been developed by the French Institut de Recherche pour le Developpement (IRD) and Centre National d'Etudes Spatiales (CNES) organizations in order to get a long-term survey of temperature, salinity and pCO2 structures in the tropical Atlantic along a merchant ship line. The first two ARAMIS cruises, in July 2002 and March 2003, were dedicated to Jason validation. The dynam...
Databáze: OpenAIRE
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