Currently huge ice mass loss over the Polar Regions is observed by the Gravity Recovery and Climate Experiment (GRACE) satellite mission considerably contributing to global sea level change. However, mostly due to the self- gravitational and elastic feedback effect global sea level change is not uniform but varies depending on location, most notably over the Polar Regions. While GRACE is able to monitor significant ice mass changes over the cryosphere, the rather small gravity signal of global sea change induced by ice melting is hard to detect and highly obstructed by continental leakage. Forward gravity modelling of the detected ice mass changes can help to reveal the spatial sea level change. Here we use ice mass changes over Greenland and Antarctic ice sheets and the Alaskan glaciers obtained from analysing five years of GRACE temporal gravity observations (release four) to model global sea level change induced by ice melting. We present GRACE-derived ice mass changes as well as forward modelled global sea level change patterns.
AGU Fall Meeting Abstracts
- Pub Date:
- December 2007
- 1225 Global change from geodesy (1222;
- 1621 Cryospheric change (0776);
- 1641 Sea level change (1222;