Details
| Original language | English |
|---|---|
| Pages (from-to) | 304-309 |
| Number of pages | 6 |
| Journal | International Association of Geodesy Symposia |
| Volume | 129 |
| Publication status | Published - Sept 2005 |
Abstract
Gravity changes due to the glacial isostatic adjustment in Fennoscandia entails a temporal geoid variation of about 3 mm and a gravity change of about 10 μGal over five years (linear trend) in the centre of the land uplift area. This gravity change can be observed by absolute gravimetry with an accuracy of lb 1 - 2 μGal and by GRACE with a geoid accuracy at the few mm level for long wavelengths. Since 2003, annual absolute gravity measurements have been intensified to improve the knowledge about the land uplift, about its accuracy and its spatial structure. Independently, relative gravimetry, tide gauge observations and GPS measurements are carried out by various institutions in dedicated campaigns or during their routine work. All Nordic countries contribute in different ways to the project (preparation of the sites, campaigns, collection of auxiliary data, computations and analyses). The main result of the project will be reduced point-wise gravity observations, which are combined with GPS height observations to derive an independent, spatially and temporally smoothed model of the geoid change. It can be compared with the land uplift determined from the GRACE data, i.e., gound-truth for the satellite measurements.
Keywords
- Absolute gravimetry, GRACE, Postglacial rebound, Temporal gravity changes
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Computers in Earth Sciences
- Earth and Planetary Sciences(all)
- Geophysics
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In: International Association of Geodesy Symposia, Vol. 129, 09.2005, p. 304-309.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Gravity Changes in the Fennoscandian Uplift Area to be Observed by GRACE and Absolute Gravimetry
AU - Müller, J.
AU - Timmen, L.
AU - Gitlein, O.
AU - Denker, H.
PY - 2005/9
Y1 - 2005/9
N2 - Gravity changes due to the glacial isostatic adjustment in Fennoscandia entails a temporal geoid variation of about 3 mm and a gravity change of about 10 μGal over five years (linear trend) in the centre of the land uplift area. This gravity change can be observed by absolute gravimetry with an accuracy of lb 1 - 2 μGal and by GRACE with a geoid accuracy at the few mm level for long wavelengths. Since 2003, annual absolute gravity measurements have been intensified to improve the knowledge about the land uplift, about its accuracy and its spatial structure. Independently, relative gravimetry, tide gauge observations and GPS measurements are carried out by various institutions in dedicated campaigns or during their routine work. All Nordic countries contribute in different ways to the project (preparation of the sites, campaigns, collection of auxiliary data, computations and analyses). The main result of the project will be reduced point-wise gravity observations, which are combined with GPS height observations to derive an independent, spatially and temporally smoothed model of the geoid change. It can be compared with the land uplift determined from the GRACE data, i.e., gound-truth for the satellite measurements.
AB - Gravity changes due to the glacial isostatic adjustment in Fennoscandia entails a temporal geoid variation of about 3 mm and a gravity change of about 10 μGal over five years (linear trend) in the centre of the land uplift area. This gravity change can be observed by absolute gravimetry with an accuracy of lb 1 - 2 μGal and by GRACE with a geoid accuracy at the few mm level for long wavelengths. Since 2003, annual absolute gravity measurements have been intensified to improve the knowledge about the land uplift, about its accuracy and its spatial structure. Independently, relative gravimetry, tide gauge observations and GPS measurements are carried out by various institutions in dedicated campaigns or during their routine work. All Nordic countries contribute in different ways to the project (preparation of the sites, campaigns, collection of auxiliary data, computations and analyses). The main result of the project will be reduced point-wise gravity observations, which are combined with GPS height observations to derive an independent, spatially and temporally smoothed model of the geoid change. It can be compared with the land uplift determined from the GRACE data, i.e., gound-truth for the satellite measurements.
KW - Absolute gravimetry
KW - GRACE
KW - Postglacial rebound
KW - Temporal gravity changes
UR - http://www.scopus.com/inward/record.url?scp=84897039611&partnerID=8YFLogxK
U2 - 10.1007/3-540-26932-0_53
DO - 10.1007/3-540-26932-0_53
M3 - Article
AN - SCOPUS:84897039611
VL - 129
SP - 304
EP - 309
JO - International Association of Geodesy Symposia
JF - International Association of Geodesy Symposia
SN - 0939-9585
ER -