A reanalysis and reinterpretation of geodetic and geological evidence of glacial isostatic adjustment in the Churchill region, Hudson Bay.
We review the historical, geological, tide-gauge, GPS and gravimetric evidence advanced in favour of or against continuing land uplift around Hudson Bay, Canada. After this, we reanalyse the tide-gauge and GPS data for Churchill using longer time series than those available to previous investigators...
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GFZ, Helmholtz-Zentrum
2004
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ftdatacite:10.23689/fidgeo-586 2023-05-15T16:35:20+02:00 A reanalysis and reinterpretation of geodetic and geological evidence of glacial isostatic adjustment in the Churchill region, Hudson Bay. Wolf, Detlef 2004 https://dx.doi.org/10.23689/fidgeo-586 https://e-docs.geo-leo.de/handle/11858/00-1735-0000-0001-32DB-E en eng GFZ, Helmholtz-Zentrum Text Article article-journal ScholarlyArticle 2004 ftdatacite https://doi.org/10.23689/fidgeo-586 2021-11-05T12:55:41Z We review the historical, geological, tide-gauge, GPS and gravimetric evidence advanced in favour of or against continuing land uplift around Hudson Bay, Canada. After this, we reanalyse the tide-gauge and GPS data for Churchill using longer time series than those available to previous investigators. The dependence of the mean rate of relative sea-level change obtained on the length and mid-epoch of the observation interval considered is investigated by means of the newly developed linear-trend analysis diagram. For studying the shorter-period variability of the tide-gauge record, the continuous-wavelet transform is used. The mean rate of land uplift obtained from GPS is based on a new analysis using IGS solutions of GFZ. Furthermore, sea-level indicators from the Churchill region representing the relative sea-level history during the past 8000 a are included. Finally, the four types of observable are jointly inverted in terms of mantle viscosity. The optimum values are 3×10^20 Pa s and 1.6 × 10^22 Pa s for the upper- and lower-mantle viscosities, respectively. : report Text Hudson Bay DataCite Metadata Store (German National Library of Science and Technology) Canada Hudson Hudson Bay |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
English |
description |
We review the historical, geological, tide-gauge, GPS and gravimetric evidence advanced in favour of or against continuing land uplift around Hudson Bay, Canada. After this, we reanalyse the tide-gauge and GPS data for Churchill using longer time series than those available to previous investigators. The dependence of the mean rate of relative sea-level change obtained on the length and mid-epoch of the observation interval considered is investigated by means of the newly developed linear-trend analysis diagram. For studying the shorter-period variability of the tide-gauge record, the continuous-wavelet transform is used. The mean rate of land uplift obtained from GPS is based on a new analysis using IGS solutions of GFZ. Furthermore, sea-level indicators from the Churchill region representing the relative sea-level history during the past 8000 a are included. Finally, the four types of observable are jointly inverted in terms of mantle viscosity. The optimum values are 3×10^20 Pa s and 1.6 × 10^22 Pa s for the upper- and lower-mantle viscosities, respectively. : report |
format |
Text |
author |
Wolf, Detlef |
spellingShingle |
Wolf, Detlef A reanalysis and reinterpretation of geodetic and geological evidence of glacial isostatic adjustment in the Churchill region, Hudson Bay. |
author_facet |
Wolf, Detlef |
author_sort |
Wolf, Detlef |
title |
A reanalysis and reinterpretation of geodetic and geological evidence of glacial isostatic adjustment in the Churchill region, Hudson Bay. |
title_short |
A reanalysis and reinterpretation of geodetic and geological evidence of glacial isostatic adjustment in the Churchill region, Hudson Bay. |
title_full |
A reanalysis and reinterpretation of geodetic and geological evidence of glacial isostatic adjustment in the Churchill region, Hudson Bay. |
title_fullStr |
A reanalysis and reinterpretation of geodetic and geological evidence of glacial isostatic adjustment in the Churchill region, Hudson Bay. |
title_full_unstemmed |
A reanalysis and reinterpretation of geodetic and geological evidence of glacial isostatic adjustment in the Churchill region, Hudson Bay. |
title_sort |
reanalysis and reinterpretation of geodetic and geological evidence of glacial isostatic adjustment in the churchill region, hudson bay. |
publisher |
GFZ, Helmholtz-Zentrum |
publishDate |
2004 |
url |
https://dx.doi.org/10.23689/fidgeo-586 https://e-docs.geo-leo.de/handle/11858/00-1735-0000-0001-32DB-E |
geographic |
Canada Hudson Hudson Bay |
geographic_facet |
Canada Hudson Hudson Bay |
genre |
Hudson Bay |
genre_facet |
Hudson Bay |
op_doi |
https://doi.org/10.23689/fidgeo-586 |
_version_ |
1766025561469091840 |