Using GPS and gravity to infer ice mass changes in Greenland



Climate research indicates that global warming is occurring and will probably continue for the next several decades. One consequence of a global warming scenario is a global sea-level rise due to thermal expansion of the nearsurface ocean water and melting of the Antarctic and Greenland ice sheets and continental glaciers.

The lack of appropriate data has made it difficult to determine the relationship and feedback mechanisms between climate, sea level, and ice mass changes. It is even unclear, for example, whether changes in the Greenland and Antarctic ice sheets over the last century have caused sea level to rise or fall.