Space-Geodetic Constraints on Glacial Isostatic Adjustment in Fennoscandia
Analysis of Global Positioning System (GPS) data demonstrates that ongoing three-dimensional crustal deformation in Fennoscandia is dominated by glacial isostatic adjustment. Our comparison of these GPS observations with numerical predictions yields an Earth model that satisfies independent geologic...
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2001
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Online Access: | http://dx.doi.org/10.1126/science.1057022 https://www.science.org/doi/pdf/10.1126/science.1057022 |
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craaas:10.1126/science.1057022 2024-09-15T18:05:50+00:00 Space-Geodetic Constraints on Glacial Isostatic Adjustment in Fennoscandia Milne, G. A. Davis, J. L. Mitrovica, Jerry X. Scherneck, H.-G. Johansson, J. M. Vermeer, M. Koivula, H. 2001 http://dx.doi.org/10.1126/science.1057022 https://www.science.org/doi/pdf/10.1126/science.1057022 en eng American Association for the Advancement of Science (AAAS) Science volume 291, issue 5512, page 2381-2385 ISSN 0036-8075 1095-9203 journal-article 2001 craaas https://doi.org/10.1126/science.1057022 2024-08-29T04:01:05Z Analysis of Global Positioning System (GPS) data demonstrates that ongoing three-dimensional crustal deformation in Fennoscandia is dominated by glacial isostatic adjustment. Our comparison of these GPS observations with numerical predictions yields an Earth model that satisfies independent geologic constraints and bounds both the average viscosity in the upper mantle (5 × 10 20 to 1 × 10 21 pascal seconds) and the elastic thickness of the lithosphere (90 to 170 kilometers). We combined GPS-derived radial motions with Fennoscandian tide gauge records to estimate a regional sea surface rise of 2.1 ± 0.3 mm/year. Furthermore, ongoing horizontal tectonic motions greater than ∼1 mm/year are ruled out on the basis of the GPS-derived three-dimensional crustal velocity field. Article in Journal/Newspaper Fennoscandia Fennoscandian AAAS Resource Center (American Association for the Advancement of Science) Science 291 5512 2381 2385 |
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AAAS Resource Center (American Association for the Advancement of Science) |
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language |
English |
description |
Analysis of Global Positioning System (GPS) data demonstrates that ongoing three-dimensional crustal deformation in Fennoscandia is dominated by glacial isostatic adjustment. Our comparison of these GPS observations with numerical predictions yields an Earth model that satisfies independent geologic constraints and bounds both the average viscosity in the upper mantle (5 × 10 20 to 1 × 10 21 pascal seconds) and the elastic thickness of the lithosphere (90 to 170 kilometers). We combined GPS-derived radial motions with Fennoscandian tide gauge records to estimate a regional sea surface rise of 2.1 ± 0.3 mm/year. Furthermore, ongoing horizontal tectonic motions greater than ∼1 mm/year are ruled out on the basis of the GPS-derived three-dimensional crustal velocity field. |
format |
Article in Journal/Newspaper |
author |
Milne, G. A. Davis, J. L. Mitrovica, Jerry X. Scherneck, H.-G. Johansson, J. M. Vermeer, M. Koivula, H. |
spellingShingle |
Milne, G. A. Davis, J. L. Mitrovica, Jerry X. Scherneck, H.-G. Johansson, J. M. Vermeer, M. Koivula, H. Space-Geodetic Constraints on Glacial Isostatic Adjustment in Fennoscandia |
author_facet |
Milne, G. A. Davis, J. L. Mitrovica, Jerry X. Scherneck, H.-G. Johansson, J. M. Vermeer, M. Koivula, H. |
author_sort |
Milne, G. A. |
title |
Space-Geodetic Constraints on Glacial Isostatic Adjustment in Fennoscandia |
title_short |
Space-Geodetic Constraints on Glacial Isostatic Adjustment in Fennoscandia |
title_full |
Space-Geodetic Constraints on Glacial Isostatic Adjustment in Fennoscandia |
title_fullStr |
Space-Geodetic Constraints on Glacial Isostatic Adjustment in Fennoscandia |
title_full_unstemmed |
Space-Geodetic Constraints on Glacial Isostatic Adjustment in Fennoscandia |
title_sort |
space-geodetic constraints on glacial isostatic adjustment in fennoscandia |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2001 |
url |
http://dx.doi.org/10.1126/science.1057022 https://www.science.org/doi/pdf/10.1126/science.1057022 |
genre |
Fennoscandia Fennoscandian |
genre_facet |
Fennoscandia Fennoscandian |
op_source |
Science volume 291, issue 5512, page 2381-2385 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.1057022 |
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Science |
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291 |
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5512 |
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2381 |
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2385 |
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1810443343631482880 |