Details
| Original language | English |
|---|---|
| Title of host publication | Observing our Changing Earth - Proceedings of the 2007 IAG General Assembly |
| Pages | 501-509 |
| Number of pages | 9 |
| Publication status | Published - 1 Dec 2009 |
| Event | 24th General Assembly of the International Union of Geodesy and Geophysics, IUGG 2007 - Perugia, Italy Duration: 2 Jul 2007 → 13 Jul 2007 |
Publication series
| Name | International Association of Geodesy Symposia |
|---|---|
| Volume | 133 |
| ISSN (Print) | 0939-9585 |
Abstract
Since 2002 the Gravity Recovery and Climate Experiment (GRACE) satellite mission is mapping the Earth's gravity field, showing variations due to the integral effect of mass variations in the atmosphere, hydrosphere and geosphere. After reduction of oceanic and atmospheric contributions as well as tidal effects during the GRACE standard processing, monthly solutions of the gravity field are provided by several institutions. The solutions of the analysis centres differ slightly, which is due the application of different reduction models and centre-specific processing schemes. In addition, residual signals from insufficient pre-processing of the transmitted satellite data may be present We present our investigation of mass variations in the areas of glacial isostatic adjustment (GIA) in North America and Northern Europe from GRACE data, especially from the latest release of the GFZ Potsdam. One key issue is the separation of GIA parts and the reduction of the observed quantities by applying dedicated filters and models of hydrological variations. In a further step, we analyse the results of both regions regarding their reliability, and finally a comparison to results from geodynamical modelling is presented. Our results clearly show that the quality of the GRACE-derived gravity change signal benefits from improved reduction models and dedicated analysis techniques. Nevertheless, the comparison to results of geodynamic models still reveals differences, and thus further studies are in progress.
Keywords
- Glacial isostatic adjustment, Global hydrology models, GRACE, Mass variation
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Computers in Earth Sciences
- Earth and Planetary Sciences(all)
- Geophysics
Sustainable Development Goals
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Observing our Changing Earth - Proceedings of the 2007 IAG General Assembly. 2009. p. 501-509 (International Association of Geodesy Symposia; Vol. 133).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Analysis of Mass Variations in Northern Glacial Rebound Areas from GRACE Data
AU - Steffen, Holger
AU - Müller, Jürgen
AU - Denker, Heiner
PY - 2009/12/1
Y1 - 2009/12/1
N2 - Since 2002 the Gravity Recovery and Climate Experiment (GRACE) satellite mission is mapping the Earth's gravity field, showing variations due to the integral effect of mass variations in the atmosphere, hydrosphere and geosphere. After reduction of oceanic and atmospheric contributions as well as tidal effects during the GRACE standard processing, monthly solutions of the gravity field are provided by several institutions. The solutions of the analysis centres differ slightly, which is due the application of different reduction models and centre-specific processing schemes. In addition, residual signals from insufficient pre-processing of the transmitted satellite data may be present We present our investigation of mass variations in the areas of glacial isostatic adjustment (GIA) in North America and Northern Europe from GRACE data, especially from the latest release of the GFZ Potsdam. One key issue is the separation of GIA parts and the reduction of the observed quantities by applying dedicated filters and models of hydrological variations. In a further step, we analyse the results of both regions regarding their reliability, and finally a comparison to results from geodynamical modelling is presented. Our results clearly show that the quality of the GRACE-derived gravity change signal benefits from improved reduction models and dedicated analysis techniques. Nevertheless, the comparison to results of geodynamic models still reveals differences, and thus further studies are in progress.
AB - Since 2002 the Gravity Recovery and Climate Experiment (GRACE) satellite mission is mapping the Earth's gravity field, showing variations due to the integral effect of mass variations in the atmosphere, hydrosphere and geosphere. After reduction of oceanic and atmospheric contributions as well as tidal effects during the GRACE standard processing, monthly solutions of the gravity field are provided by several institutions. The solutions of the analysis centres differ slightly, which is due the application of different reduction models and centre-specific processing schemes. In addition, residual signals from insufficient pre-processing of the transmitted satellite data may be present We present our investigation of mass variations in the areas of glacial isostatic adjustment (GIA) in North America and Northern Europe from GRACE data, especially from the latest release of the GFZ Potsdam. One key issue is the separation of GIA parts and the reduction of the observed quantities by applying dedicated filters and models of hydrological variations. In a further step, we analyse the results of both regions regarding their reliability, and finally a comparison to results from geodynamical modelling is presented. Our results clearly show that the quality of the GRACE-derived gravity change signal benefits from improved reduction models and dedicated analysis techniques. Nevertheless, the comparison to results of geodynamic models still reveals differences, and thus further studies are in progress.
KW - Glacial isostatic adjustment
KW - Global hydrology models
KW - GRACE
KW - Mass variation
UR - http://www.scopus.com/inward/record.url?scp=84884359117&partnerID=8YFLogxK
U2 - 10.1007/978-3-540-85426-5_60
DO - 10.1007/978-3-540-85426-5_60
M3 - Conference contribution
AN - SCOPUS:84884359117
SN - 9783540854258
T3 - International Association of Geodesy Symposia
SP - 501
EP - 509
BT - Observing our Changing Earth - Proceedings of the 2007 IAG General Assembly
T2 - 24th General Assembly of the International Union of Geodesy and Geophysics, IUGG 2007
Y2 - 2 July 2007 through 13 July 2007
ER -