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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ftsubggeo:oai:e-docs.geo-leo.de:11858/00-1735-0000-0001-32DB-E 2024-06-09T07:46:35+00:00 A reanalysis and reinterpretation of geodetic and geological evidence of glacial isostatic adjustment in the Churchill region, Hudson Bay. Wolf, Detlef 2004 application/pdf http://hdl.handle.net/11858/00-1735-0000-0001-32DB-E https://doi.org/10.23689/fidgeo-586 eng eng GFZ, Helmholtz-Zentrum Scientific Technical Report / Geoforschungszentrum Potsdam; 2004, 11 Geophysik doi:10.23689/fidgeo-586 474730700 http://hdl.handle.net/11858/00-1735-0000-0001-32DB-E http://creativecommons.org/licenses/by-nc-sa/2.0/de/deed.de ddc:551 doc-type:article publishedVersion 2004 ftsubggeo https://doi.org/10.23689/fidgeo-586 2024-05-10T04:57:11Z 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 Article in Journal/Newspaper Hudson Bay GEO-LEOe-docs (FID GEO) Canada Hudson Hudson Bay |
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Open Polar |
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GEO-LEOe-docs (FID GEO) |
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ftsubggeo |
language |
English |
topic |
ddc:551 |
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ddc:551 Wolf, Detlef A reanalysis and reinterpretation of geodetic and geological evidence of glacial isostatic adjustment in the Churchill region, Hudson Bay. |
topic_facet |
ddc:551 |
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 |
Article in Journal/Newspaper |
author |
Wolf, Detlef |
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 |
http://hdl.handle.net/11858/00-1735-0000-0001-32DB-E https://doi.org/10.23689/fidgeo-586 |
geographic |
Canada Hudson Hudson Bay |
geographic_facet |
Canada Hudson Hudson Bay |
genre |
Hudson Bay |
genre_facet |
Hudson Bay |
op_relation |
Scientific Technical Report / Geoforschungszentrum Potsdam; 2004, 11 Geophysik doi:10.23689/fidgeo-586 474730700 http://hdl.handle.net/11858/00-1735-0000-0001-32DB-E |
op_rights |
http://creativecommons.org/licenses/by-nc-sa/2.0/de/deed.de |
op_doi |
https://doi.org/10.23689/fidgeo-586 |
_version_ |
1801376537066340352 |