 |
| Titel |
Changes in present day ice melting observed by GPS and Superconducting Gravimeter at Svalbard, Norway |
| VerfasserIn |
Ove Christian Dahl Omang, Halfdan Pascal Kierulf |
| Konferenz |
EGU General Assembly 2011
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250051866
|
|
|
|
|
|
| Zusammenfassung |
| We observe changes in the uplift rate and gravity rate at Ny-Ålesund, Svalbard,
Norway. We uses GPS and Superconducting Gravimeter (SG) measurements between
September 1999 and September 2010. We find that during this time period the change in
gravity and vertical uplift is not a constant, but changes with time. Both the GPS and
gravity measurements are better represented by three linear trends than by one,
implying varying ice mass loss. Observed changes in uplift and gravity rate fits
quite well with ice mass balance observations. Both GPS and SG measurements
give larger uplift and gravity rate than predicted by geophysical models. The ratio
between the unmodelled gravity change and unmodelled uplift indicates that the
driving source is to be found in the viscoelastic process, such as post glacial rebound. |
|
|
|
|
|
|