logo image for top of page



a core project of

J Bamber: STSE CryoSat+ Cryosphere Study Regional glacial isostatic adjustment and CryoSatelevation rate corrections in Antarctica (REGINA)

Description

Presented by Jonathan Bamber,University of Bristol, UK, at the ESA-CliC Earth Observation and Arctic Science Priorities Meeting, Norway, 2015

A major uncertainty in determining the mass balance of the Antarctic ice sheet from satellite gravimetry, and, to a lesser extent, altimetry measurements is the necessary correction for viscous flow in the Earth’s interior and surface deformation related to the glacial isostatic adjustment (GIA). Although much progress has been made in consistently modelling ice sheets and solid Earth deformation, predictions of GIA remain ambiguous and their uncertainty continues to be larger than the GRACE mass trends for Antarctica.

Within the STSE project REGINA, temporal linear trends in the altimetry, gravimetry and GPS data were consistently combined using a novel approach based on Earth model response functions. This allowed to separate present-day ice-mass change from GIA, as well as assesses the influence of Earth structures most suitable for West Antarctica. The REGINA project successfully determined the GIA impact on CryoSat-2 elevation rates and GRACE mass trends. However, it also revealed substantial differences to and among published GIA predictions -- both in terms of the total and regional apparent GIA-induced mass change, introducing great uncertainty in reconciling ice-mass balance estimates from satellite altimetry and gravimetry.

For more information on the meeting this was presented at, see http://www.climate-cryosphere.org/meetings/esa-arctic-2015

Mass Balance of the Antarctic Ice Sheet 1992-2008
(Media / Mass Balance of the Antarctic Ice Sheet 1992-2008)
Mass Balance of the Antarctic Ice Sheet 1992-2008 from ERS and ICESat: Gains exceed losses - Presented by Jay Zwally, NASA Goddard, USA
2008-01 No. 10 Ice and Climate News
(Media / 2008-01 No. 10 Ice and Climate News)
- CliC Scientific Steering Group (comings and goings) - Atmosphere-Ocean General Circulation Models - Global Prediction: Permafrost - Operational Sea-Ice Analysis and Forecasting at met.no - Arctic Council Climate and Cryosphere Project - Seasonal Forecast of Antarctic Sea Ice - The Global...
1996-June: ACSYS Arctic Forecast
(Media / 1996-June: ACSYS Arctic Forecast)
1. Sea-Ice Charts of the Arctic 2. Sea-Ice Ocean Modelling (SIOM) 3. German-Russian Cooperation 4. Are you and ACSYS Scientist? 5. SHEBA

View all

Back to Top