Estimation of the Atlantic sea-level response to atmospheric pressure using ERS-2 altimeter data and a global ocean model

Jesus Gomez-Enri; Pilar Villares; Miguel Bruno; Jerome Benveniste

doi:10.1117/12.452744

14 January 2002 Estimation of the Atlantic sea-level response to atmospheric pressure using ERS-2 altimeter data and a global ocean model

Jesus Gomez-Enri, Pilar Villares, Miguel Bruno, Jerome Benveniste

Author Affiliations +

Proceedings Volume 4544, Remote Sensing of the Ocean and Sea Ice 2001; (2002) https://doi.org/10.1117/12.452744
Event: International Symposium on Remote Sensing, 2001, Toulouse, France

Abstract

The ocean response to pressure variations is subtracted from altimeter records using the standard Inverse Barometer Correction (IBC), based on the hypothetical isostatic assumption. Previous analyses have demonstrated that this assumption has to be applied with care when the high frequency pressure variations are considered, as is the case of using the crossover track method. Using ERS-2 radar altimeter data, we study the response of the Atlantic Sea Level (ASL) to pressure forcings at different ranges of frequency, in order to determine the validity of the isostatic assumption. We have also determined this response when using the outputs of a Global Ocean Model (GOM) forced by pressure and wind fields. From the comparison between both results we have observed that data errors could be underestimating our estimations of the response of the ocean to pressure variations; this underestimation could represent more than 20 percent of the values obtained in equatorial and tropical zones, being insignificant out of the latitudinal band.

Citation Download Citation

Jesus Gomez-Enri, Pilar Villares, Miguel Bruno, and Jerome Benveniste "Estimation of the Atlantic sea-level response to atmospheric pressure using ERS-2 altimeter data and a global ocean model", Proc. SPIE 4544, Remote Sensing of the Ocean and Sea Ice 2001, (14 January 2002); https://doi.org/10.1117/12.452744

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