Regional glacial isostatic adjustment and CryoSat elevation rate corrections in Antarctica (REGINA)
The primary objective of the REGINA is to provide a regionally refined estimate of glacial-isostatic adjustment (GIA) in Antarctica from space-geodetic measurement (GOCE, GRACE, GPS and satellite altimetry), as well as advanced modeling of the solid Earth. As a final result, elevation rate corrections, along with their uncertainties, will be delivered for application to ESA's CryoSat data. There are six main scientific tasks addressed by the study:
- Determining the state-of-the-art in the analysis of altimetry and satellite gravimetry, GPS solutions processing, and GIA modeling, identifying major limitations, and proposing solution strategies to be explored in the project
- Collecting of data sets of GRACE, GOCE, CryoSat, GPS at the adequate processing level, as well as constraints on Earth structure (e.g., seismic tomography) and glacial reconstructions
- Refining space-geodetic data sets in terms of accuracy, spatial resolution and error description. Forward modeling of GIA with extended Earth structure, including a crustal low-viscosity zone, and considering newly available data constraints.
- Developing and validating of a rigorous combination approach for the diverse data sets and modeling results
- Demonstrating the improvement of the developed regional GIA uplift rate corrections over published versions and determining the impact on CryoSat topographic change.
- Collecting feedback from CryoSat users and the wider scientific communities. Identify open issues and possible solutions strategies.
The project is funded within the Support to Science Element (STSE) of the European Space Agency (ESA) though ESRIN contract No. 4000107393/12/I-NB.