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Earth System Science Data The Data Publishing Journal
https://doi.org/10.5194/essd-2017-46
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
15 Jun 2017
Review status
This discussion paper is under review for the journal Earth System Science Data (ESSD).
Altimetry, gravimetry, GPS and viscoelastic modelling data for the joint inversion for glacial isostatic adjustment in Antarctica (ESA STSE Project REGINA)
Ingo Sasgen1, Alba Martín-Español2, Alexander Horvath3, Volker Klemann4, Elizabeth J. Petrie5, Bert Wouters6, Martin Horwath7, Roland Pail3, Jonathan L. Bamber2, Peter J. Clarke8, Hannes Konrad9, Terry Wilson10, and Mark R. Drinkwater11 1Division of Climate Sciences, Alfred Wegener Institute, Bussestraße 24, 27570 Bremerhaven, Germany
2School of Geographical Sciences, University of Bristol, University Road, Clifton, Bristol BS8 1SS, United Kingdom
3Institut für Astronomische und Physikalische Geodäsie, Technische Universität München, Arcisstraße 21, 80333 München, Germany
4Department of Geodesy, GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany
5School of Geographical and Earth Sciences, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
6Institute for Marine and Atmospheric Research, Utrecht University, Princetonplein 5, 3584 CC, Utrecht, The Netherlands
7Institut für Planetare Geodäsie, Technische Universität Dresden, Helmholtzstr. 10, 01069 Dresden, Germany
8School of Civil Engineering and Geosciences, Newcastle University, Newcastle , NE1 7RU, United Kingdom
9School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, United Kingdom
10School of Earth Science, Ohio State University, 275 Mendenhall Lab, 125 South Oval Mall, Columbus OH, 43210, USA
11Mission Science Division, European Space Agency, European Space Research and Technology Centre, Keplerlaan 1, Noordwijk 2201 AZ, The Netherlands
Abstract. A major uncertainty in determining the mass balance of the Antarctic ice sheet from measurements of satellite gravimetry, and to a lesser extent satellite altimetry, is the poorly known correction for the ongoing deformation of the solid Earth caused by glacial isostatic adjustment (GIA). In the past decade, much progress has been made in consistently modelling the ice sheet and solid Earth interactions; however, forward-modelling solutions of GIA in Antarctica remain uncertain due to the sparsity of constraints on the ice sheet evolution, as well as the Earth's rheological properties. An alternative approach towards estimating GIA is the joint inversion of multiple satellite data – namely, satellite gravimetry, satellite altimetry and GPS, which reflect, with different sensitivities, trends of recent glacial changes and GIA. Crucial to the success of this approach is the accuracy of the space-geodetic data sets. Here, we present reprocessed rates of surface-ice elevation change (Envisat/ICESat; 2003–2009), gravity field change (GRACE; 2003–2009) and bedrock uplift (GPS; 1995–2013.7). The data analysis is complemented by the forward-modelling of viscoelastic response functions to disc load forcing, allowing us to relate GIA-induced surface displacements with gravity changes for different rheological parameters of the solid Earth. The data and modelling results presented here are available in the Pangea archive; https://doi.pangaea.de/10.1594/PANGAEA.875745. The data sets are the input streams for the joint inversion estimate of present-day ice-mass change and GIA, focusing on Antarctica. However, the methods, code and data provided in this paper are applicable to solve other problems, such as volume balances of the Antarctic ice sheet, or to other geographical regions, in the case of the viscoelastic response functions. This paper presents the first of two contributions summarizing the work carried out within a European Space Agency funded study, REGINA.

Citation: Sasgen, I., Martín-Español, A., Horvath, A., Klemann, V., Petrie, E. J., Wouters, B., Horwath, M., Pail, R., Bamber, J. L., Clarke, P. J., Konrad, H., Wilson, T., and Drinkwater, M. R.: Altimetry, gravimetry, GPS and viscoelastic modelling data for the joint inversion for glacial isostatic adjustment in Antarctica (ESA STSE Project REGINA), Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2017-46, in review, 2017.
Ingo Sasgen et al.
Ingo Sasgen et al.

Data sets

Altimetry, gravimetry, GPS data (2003–2013), and viscoelastic modelling results for the joint inversion for glacial isostatic adjustment in Antarctica (data & code)
I. Sasgen, A. Martín-Español, A. Horvath, V. Klemann, E. J. Petrie, B. Wouters, M. Horwath, R. Pail, J. L. Bamber, P. J. Clarke, H. Konrad, T. Wilson, and M. R. Drinkwater
https://doi.pangaea.de/10.1594/PANGAEA.875745

Model code and software

Altimetry, gravimetry, GPS data (2003–2013), and viscoelastic modelling results for the joint inversion for glacial isostatic adjustment in Antarctica (data & code)
I. Sasgen, A. Martín-Español, A. Horvath, V. Klemann, E. J. Petrie, B. Wouters, M. Horwath, R. Pail, J. L. Bamber, P. J. Clarke, H. Konrad, T. Wilson, and M. R. Drinkwater
https://doi.pangaea.de/10.1594/PANGAEA.875745
Ingo Sasgen et al.

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Short summary
We present a collection of data sets, consisting of surface-elevation rates for Antarctic ice sheet from a combination of Envisat and ICESat, bedrock uplift rates for 118 GPS sites in Antarctica and optimally filtered GRACE gravity field rates. We provide viscoelastic response functions to a disc load forcing for Earth structures present East and West Antarctica. This data collection enables a joint inversion for present-day ice-mass changes and glacial-isostatic adjustment in Antarctica.
We present a collection of data sets, consisting of surface-elevation rates for Antarctic ice...
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