A relative sea-level history for Arviat, Nunavut, and implications for Laurentide Ice Sheet thickness west of Hudson Bay

Abstract Thirty-six new and previously published radiocarbon dates constrain the relative sea-level history of Arviat on the west coast of Hudson Bay. As a result of glacial isostatic adjustment (GIA) following deglaciation, sea level fell rapidly from a high-stand of nearly 170 m elevation just aft...

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Published in:Quaternary Research
Main Authors: Simon, Karen M., James, Thomas S., Forbes, Donald L., Telka, Alice M., Dyke, Arthur S., Henton, Joseph A.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 2014
Subjects:
Online Access:http://dx.doi.org/10.1016/j.yqres.2014.04.002
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spelling crcambridgeupr:10.1016/j.yqres.2014.04.002 2024-10-13T14:05:53+00:00 A relative sea-level history for Arviat, Nunavut, and implications for Laurentide Ice Sheet thickness west of Hudson Bay Simon, Karen M. James, Thomas S. Forbes, Donald L. Telka, Alice M. Dyke, Arthur S. Henton, Joseph A. 2014 http://dx.doi.org/10.1016/j.yqres.2014.04.002 http://api.elsevier.com/content/article/PII:S0033589414000416?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589414000416?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S003358940000942X en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms http://www.elsevier.com/tdm/userlicense/1.0/ Quaternary Research volume 82, issue 1, page 185-197 ISSN 0033-5894 1096-0287 journal-article 2014 crcambridgeupr https://doi.org/10.1016/j.yqres.2014.04.002 2024-09-18T04:02:39Z Abstract Thirty-six new and previously published radiocarbon dates constrain the relative sea-level history of Arviat on the west coast of Hudson Bay. As a result of glacial isostatic adjustment (GIA) following deglaciation, sea level fell rapidly from a high-stand of nearly 170 m elevation just after 8000 cal yr BP to 60 m elevation by the mid Holocene (~ 5200 cal yr BP). The rate of sea-level fall decreased in the mid and late Holocene, with sea level falling 30 m since 3000 cal yr BP. Several late Holocene sea-level measurements are interpreted to originate from the upper end of the tidal range and place tight constraints on sea level. A preliminary measurement of present-day vertical land motion obtained by repeat Global Positioning System (GPS) occupations indicates ongoing crustal uplift at Arviat of 9.3 ± 1.5 mm/yr, in close agreement with the crustal uplift rate inferred from the inferred sea-level curve. Predictions of numerical GIA models indicate that the new sea-level curve is best fit by a Laurentide Ice Sheet reconstruction with a last glacial maximum peak thickness of ~ 3.4 km. This is a 30–35% thickness reduction of the ICE-5G ice-sheet history west of Hudson Bay. Article in Journal/Newspaper Arviat Hudson Bay Ice Sheet Nunavut Cambridge University Press Hudson Hudson Bay Nunavut Quaternary Research 82 1 185 197
institution Open Polar
collection Cambridge University Press
op_collection_id crcambridgeupr
language English
description Abstract Thirty-six new and previously published radiocarbon dates constrain the relative sea-level history of Arviat on the west coast of Hudson Bay. As a result of glacial isostatic adjustment (GIA) following deglaciation, sea level fell rapidly from a high-stand of nearly 170 m elevation just after 8000 cal yr BP to 60 m elevation by the mid Holocene (~ 5200 cal yr BP). The rate of sea-level fall decreased in the mid and late Holocene, with sea level falling 30 m since 3000 cal yr BP. Several late Holocene sea-level measurements are interpreted to originate from the upper end of the tidal range and place tight constraints on sea level. A preliminary measurement of present-day vertical land motion obtained by repeat Global Positioning System (GPS) occupations indicates ongoing crustal uplift at Arviat of 9.3 ± 1.5 mm/yr, in close agreement with the crustal uplift rate inferred from the inferred sea-level curve. Predictions of numerical GIA models indicate that the new sea-level curve is best fit by a Laurentide Ice Sheet reconstruction with a last glacial maximum peak thickness of ~ 3.4 km. This is a 30–35% thickness reduction of the ICE-5G ice-sheet history west of Hudson Bay.
format Article in Journal/Newspaper
author Simon, Karen M.
James, Thomas S.
Forbes, Donald L.
Telka, Alice M.
Dyke, Arthur S.
Henton, Joseph A.
spellingShingle Simon, Karen M.
James, Thomas S.
Forbes, Donald L.
Telka, Alice M.
Dyke, Arthur S.
Henton, Joseph A.
A relative sea-level history for Arviat, Nunavut, and implications for Laurentide Ice Sheet thickness west of Hudson Bay
author_facet Simon, Karen M.
James, Thomas S.
Forbes, Donald L.
Telka, Alice M.
Dyke, Arthur S.
Henton, Joseph A.
author_sort Simon, Karen M.
title A relative sea-level history for Arviat, Nunavut, and implications for Laurentide Ice Sheet thickness west of Hudson Bay
title_short A relative sea-level history for Arviat, Nunavut, and implications for Laurentide Ice Sheet thickness west of Hudson Bay
title_full A relative sea-level history for Arviat, Nunavut, and implications for Laurentide Ice Sheet thickness west of Hudson Bay
title_fullStr A relative sea-level history for Arviat, Nunavut, and implications for Laurentide Ice Sheet thickness west of Hudson Bay
title_full_unstemmed A relative sea-level history for Arviat, Nunavut, and implications for Laurentide Ice Sheet thickness west of Hudson Bay
title_sort relative sea-level history for arviat, nunavut, and implications for laurentide ice sheet thickness west of hudson bay
publisher Cambridge University Press (CUP)
publishDate 2014
url http://dx.doi.org/10.1016/j.yqres.2014.04.002
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geographic Hudson
Hudson Bay
Nunavut
geographic_facet Hudson
Hudson Bay
Nunavut
genre Arviat
Hudson Bay
Ice Sheet
Nunavut
genre_facet Arviat
Hudson Bay
Ice Sheet
Nunavut
op_source Quaternary Research
volume 82, issue 1, page 185-197
ISSN 0033-5894 1096-0287
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op_doi https://doi.org/10.1016/j.yqres.2014.04.002
container_title Quaternary Research
container_volume 82
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