Details
| Original language | English |
|---|---|
| Title of host publication | Geodetic Deformation Monitoring |
| Subtitle of host publication | From Geophysical to Engineering Roles - IAG Symposium |
| Publisher | Springer Verlag |
| Pages | 193-199 |
| Number of pages | 7 |
| ISBN (print) | 9783540385950 |
| Publication status | Published - 2006 |
| Event | International Symposium on Geodetic Deformation Monitoring - Jaen, Spain Duration: 17 Mar 2005 → 19 Mar 2005 |
Publication series
| Name | International Association of Geodesy Symposia |
|---|---|
| Volume | 131 |
| ISSN (Print) | 0939-9585 |
Abstract
The Nordic countries Norway, Sweden, Denmark and Finland are a key study region for the research of glacial isostasy, and, in addition, it offers a unique opportunity for validating and testing the results of the GRACE experiment. Over a period of five years, the expected life time of GRACE, a temporal geoid variation of 3.0 mm is expected in the centre of the Fennoscandian land uplift area, corresponding to a gravity change of about 100 nm/s2. This is expected to be within the detection capabilities of GRACE. With terrestrial absolute gravimetry, the gravity change due to the land uplift can be observed with an accuracy of ±10 to 20 nm/s2 for a 5-year period. Thus, the terrestrial insitu observations (ground-truth) may be used to validate and test the GRACE results. Since 2003, absolute gravity measurements have been performed in Fennoscandia at about 30 stations covering Norway, Sweden, Finland and Denmark. Four groups with FG5 absolute gravimeters (BKG, FGI, IfE, UMB) are engaged to survey the uplift network annually by a mutually controlled procedure. Nearly all absolute stations are colocated with permanent GPS stations. From the 2003 and 2004 comparisons between the instruments, an overall accuracy of ±30 nm/s2 is indicated for a single absolute gravimeter and a single station determination. This is in full agreement with the project goal.
Keywords
- Absolute gravimetry, Fennoscandian land uplift, geoid change, glacial isostatic adjustment (GIA), GRACE validation, postglacial rebound (PGR)
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Computers in Earth Sciences
- Earth and Planetary Sciences(all)
- Geophysics
Cite this
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Geodetic Deformation Monitoring: From Geophysical to Engineering Roles - IAG Symposium. Springer Verlag, 2006. p. 193-199 (International Association of Geodesy Symposia; Vol. 131).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Observing Fennoscandian Gravity Change by Absolute Gravimetry
AU - Timmen, L.
AU - Gitlein, O.
AU - Müller, J.
AU - Denker, H.
AU - Mäkinen, J.
AU - Bilker, M.
AU - Pettersen, B. R.
AU - Lysaker, D. I.
AU - Omang, O. C.D.
AU - Svendsen, J. G.G.
AU - Wilmes, H.
AU - Falk, R.
AU - Reinhold, A.
AU - Hoppe, W.
AU - Scherneck, H. G.
AU - Engen, B.
AU - Harsson, B. G.
AU - Engfeldt, A.
AU - Lilje, M.
AU - Strykowski, G.
AU - Forsberg, R.
PY - 2006
Y1 - 2006
N2 - The Nordic countries Norway, Sweden, Denmark and Finland are a key study region for the research of glacial isostasy, and, in addition, it offers a unique opportunity for validating and testing the results of the GRACE experiment. Over a period of five years, the expected life time of GRACE, a temporal geoid variation of 3.0 mm is expected in the centre of the Fennoscandian land uplift area, corresponding to a gravity change of about 100 nm/s2. This is expected to be within the detection capabilities of GRACE. With terrestrial absolute gravimetry, the gravity change due to the land uplift can be observed with an accuracy of ±10 to 20 nm/s2 for a 5-year period. Thus, the terrestrial insitu observations (ground-truth) may be used to validate and test the GRACE results. Since 2003, absolute gravity measurements have been performed in Fennoscandia at about 30 stations covering Norway, Sweden, Finland and Denmark. Four groups with FG5 absolute gravimeters (BKG, FGI, IfE, UMB) are engaged to survey the uplift network annually by a mutually controlled procedure. Nearly all absolute stations are colocated with permanent GPS stations. From the 2003 and 2004 comparisons between the instruments, an overall accuracy of ±30 nm/s2 is indicated for a single absolute gravimeter and a single station determination. This is in full agreement with the project goal.
AB - The Nordic countries Norway, Sweden, Denmark and Finland are a key study region for the research of glacial isostasy, and, in addition, it offers a unique opportunity for validating and testing the results of the GRACE experiment. Over a period of five years, the expected life time of GRACE, a temporal geoid variation of 3.0 mm is expected in the centre of the Fennoscandian land uplift area, corresponding to a gravity change of about 100 nm/s2. This is expected to be within the detection capabilities of GRACE. With terrestrial absolute gravimetry, the gravity change due to the land uplift can be observed with an accuracy of ±10 to 20 nm/s2 for a 5-year period. Thus, the terrestrial insitu observations (ground-truth) may be used to validate and test the GRACE results. Since 2003, absolute gravity measurements have been performed in Fennoscandia at about 30 stations covering Norway, Sweden, Finland and Denmark. Four groups with FG5 absolute gravimeters (BKG, FGI, IfE, UMB) are engaged to survey the uplift network annually by a mutually controlled procedure. Nearly all absolute stations are colocated with permanent GPS stations. From the 2003 and 2004 comparisons between the instruments, an overall accuracy of ±30 nm/s2 is indicated for a single absolute gravimeter and a single station determination. This is in full agreement with the project goal.
KW - Absolute gravimetry
KW - Fennoscandian land uplift
KW - geoid change
KW - glacial isostatic adjustment (GIA)
KW - GRACE validation
KW - postglacial rebound (PGR)
UR - http://www.scopus.com/inward/record.url?scp=84884341645&partnerID=8YFLogxK
U2 - 10.1007/978-3-540-38596-7_23
DO - 10.1007/978-3-540-38596-7_23
M3 - Conference contribution
AN - SCOPUS:84884341645
SN - 9783540385950
T3 - International Association of Geodesy Symposia
SP - 193
EP - 199
BT - Geodetic Deformation Monitoring
PB - Springer Verlag
T2 - International Symposium on Geodetic Deformation Monitoring
Y2 - 17 March 2005 through 19 March 2005
ER -