Living Planet   


Estimating the ocean circulation and the geoid through a combined analysis of altimetric and geoid information.

Mr Detlef Stammer(1)

(1) Universitaet Hamburg, Troplowitz Str 7, 22529 Hamburg, Germany


An ocean data assimilation frame work will be presented which is designed to obtain a dynamically consistent picture of the changing flow field of the ocean by combining global ocean data set with a general circulation model (GCM). For the mean circulation a precise geoid describes the reference frame for dynamical signals in altimetric sea surface height observations. For a consistent estimate information about the prior geoid error covariance is essential and the results need to be consistent with estimated residuals in sea surface height and the prior error information. Data assimilation is one of the few quantitative consistency checks for anticipated new geoid measurements. Anticipated from the assimilation procedure is a best possible estimate of the dynamical sea surface height that when subtracted from altimetric observations can help improving geoid estimates them self.


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Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry