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Impact of ARGO temperature and salinity measurements in the new ECMWF ocean analysis system, with focus on the interaction with altimeter data.

Magdalena A. Balmaseda(1) , Arthur Vidard(1) , and David L.T. Anderson(1)

(1) ECMWF, Shinfield Park, Reading RG2 9AX, United Kingdom


The impact of temperature data from ARGO floats in the ECWMF ocean analysis system was addressed in a previous study (Vidard et al 2005). No evaluation was made of the salinity information, since by the time of the study the ECMWF system did not have the capability of assimilating salinity. Besides the time period for the impact of ARGO in this study was restricted to 2002-2003.

Recently, the operational ocean analysis system at ECMWF has been substantially upgraded, and both salinity data and sea level anomalies from altimeter are now assimilated together with subsurface temperature data. The new system is used to assess the impact of both temperature and salinity measurements from ARGO by conducting observing system experiments (OSEs) during the period 2000-2005. The potential synergy between ARGO and altimeter information is specifically addressed in the experimental design.


Workshop presentation


                 Last modified: 07.10.03