Refined European sea level estimations by combining altimetry, tide gauges, hydrographic and other data sets with improved regional GIA modeling and tailored regional GRACE gravity field models (RESEL-GRACE)

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The aim of our collaborative research proposal is to refine European sea level estimations by combining altimetry, tide gauges, ARGO float data, hydrographic and other data sets with improved regional GIA modeling and tailored regional GRACE gravity field models. Partial objectives of this CRP include to derive regional mean and time-variable gravity models directly from GRACE instrument data for dedicated European regions of interest, in particular for the Mediterranean Sea and the North Sea/Fennoscandia region. These regional models will be computed for the full GRACE mission period, and their derivation will follow the same standards and conventions as currently adopted for GFZ’s standard global monthly EIGEN-GRACE05S models. To update the average and regional sea level rates in the Mediterranean Sea using multi satellite altimetry data, in particular Jason-1, Envisat, Jason-2 (to be launched in 2008) and SARAL/Altika (to be launched in 2009). To explain the water mass contribution to sea level by using new and independent GRACE measurements of gravity due to redistribution of water mass at the surface of the Earth. To improve estimates of glacial-isostatic adjustment in Northern Europe and to improve our knowledge of the shallow earth structure and rheology of the region. The coupled earth-ice model and the method to constrain the process of glacial-isostatic adjustment with satellite gravity data can and will be used for the Mediterranean as well.