GRACE-derived land-hydrological mass changes and their impact on relative sea-level variations
The GRACE (Gravity Recovery And Climate Experiment) mission allows inference of mass variations on, above and beneath the Earth’s surface from gravitational signatures in space. We present a robust and straightforward procedure to derive mass changes from time-variable gravity field estimates. We ou...
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| Format: | Journal Article |
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Oesterreichische Gesellschaft fuer Vermessung und Geoiformation und Oesterreichische Geodaetische Kommission
2011
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/18931 |
| _version_ | 1848749888828866560 |
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| author | Baur, O. Kuhn, Michael Featherstone, Will |
| author_facet | Baur, O. Kuhn, Michael Featherstone, Will |
| author_sort | Baur, O. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The GRACE (Gravity Recovery And Climate Experiment) mission allows inference of mass variations on, above and beneath the Earth’s surface from gravitational signatures in space. We present a robust and straightforward procedure to derive mass changes from time-variable gravity field estimates. We outline our solution to the leakage problem and shed light on linear versus accelerated secular-change modeling. Based on a six-year gravity field time-series from March 2003 to February 2009, we provide detailed analysis of two selected areas, Greenland and the Orinoco Basin. As a result, annual Greenland mass loss accelerated by +21.3±3 Gt/yr2 during the six-year period. Furthermore, we show the impact of recent ice melting on global relative sea level. In terms of uniform change, the contributions of Greenland and Antarctica are +0.56±0.01 mm/yr and +0.50±0.07 mm/yr, respectively. However, we prove that simplistic uniform modeling of sea-level variations is insufficient as it disregards the gravitational feedback effect caused by mass redistribution. |
| first_indexed | 2025-11-14T07:28:06Z |
| format | Journal Article |
| id | curtin-20.500.11937-18931 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:28:06Z |
| publishDate | 2011 |
| publisher | Oesterreichische Gesellschaft fuer Vermessung und Geoiformation und Oesterreichische Geodaetische Kommission |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-189312017-01-30T12:10:45Z GRACE-derived land-hydrological mass changes and their impact on relative sea-level variations Baur, O. Kuhn, Michael Featherstone, Will mass balance trend estimation Satellite gravimetry sea-level change The GRACE (Gravity Recovery And Climate Experiment) mission allows inference of mass variations on, above and beneath the Earth’s surface from gravitational signatures in space. We present a robust and straightforward procedure to derive mass changes from time-variable gravity field estimates. We outline our solution to the leakage problem and shed light on linear versus accelerated secular-change modeling. Based on a six-year gravity field time-series from March 2003 to February 2009, we provide detailed analysis of two selected areas, Greenland and the Orinoco Basin. As a result, annual Greenland mass loss accelerated by +21.3±3 Gt/yr2 during the six-year period. Furthermore, we show the impact of recent ice melting on global relative sea level. In terms of uniform change, the contributions of Greenland and Antarctica are +0.56±0.01 mm/yr and +0.50±0.07 mm/yr, respectively. However, we prove that simplistic uniform modeling of sea-level variations is insufficient as it disregards the gravitational feedback effect caused by mass redistribution. 2011 Journal Article http://hdl.handle.net/20.500.11937/18931 Oesterreichische Gesellschaft fuer Vermessung und Geoiformation und Oesterreichische Geodaetische Kommission restricted |
| spellingShingle | mass balance trend estimation Satellite gravimetry sea-level change Baur, O. Kuhn, Michael Featherstone, Will GRACE-derived land-hydrological mass changes and their impact on relative sea-level variations |
| title | GRACE-derived land-hydrological mass changes and their impact on relative sea-level variations |
| title_full | GRACE-derived land-hydrological mass changes and their impact on relative sea-level variations |
| title_fullStr | GRACE-derived land-hydrological mass changes and their impact on relative sea-level variations |
| title_full_unstemmed | GRACE-derived land-hydrological mass changes and their impact on relative sea-level variations |
| title_short | GRACE-derived land-hydrological mass changes and their impact on relative sea-level variations |
| title_sort | grace-derived land-hydrological mass changes and their impact on relative sea-level variations |
| topic | mass balance trend estimation Satellite gravimetry sea-level change |
| url | http://hdl.handle.net/20.500.11937/18931 |