Postglacial sea-level history of Edgeøya and Barentsøya, eastern Svalbard
Four relative sea-level curves from Edgeøya and Barentsøya are constructed based on 81 radiocarbon age determinations on carefully selected and levelled samples in raised beaches, mostly driftwood embedded in beach gravel. All the dates, covering the period from the deglaciation to the present, are...
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Norwegian Polar Institute
1995
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ftjpolarres:oai:journals.openacademia.net:article/1945 2023-05-15T15:08:57+02:00 Postglacial sea-level history of Edgeøya and Barentsøya, eastern Svalbard Bondevik, Stein Mangerud, Jan Ronnert, Lars Salvigsen, Otto 1995-01-11 application/pdf https://polarresearch.net/index.php/polar/article/view/1945 https://doi.org/10.3402/polar.v14i2.6661 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/1945/5194 https://polarresearch.net/index.php/polar/article/view/1945 doi:10.3402/polar.v14i2.6661 Copyright (c) 2018 Polar Research Polar Research; Vol. 14 No. 2 (1995): Special issue: the PONAM project in eastern Svalbard; 153-180 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1995 ftjpolarres https://doi.org/10.3402/polar.v14i2.6661 2021-11-11T19:11:42Z Four relative sea-level curves from Edgeøya and Barentsøya are constructed based on 81 radiocarbon age determinations on carefully selected and levelled samples in raised beaches, mostly driftwood embedded in beach gravel. All the dates, covering the period from the deglaciation to the present, are calibrated to calendar years, and the sea-level curves are defined by fitting the data with a least square regression curve. The dates are internally very consistent, and the results are some of the most precise sea-level curves from the Arctic. The four curves are quite similar, and from the marine limit at 85-90 m a.s.l. they show a rapid emergence (ca 40 mm/year), formed about 11,000 cal yrs BP (?10,00014C yrs BP). A minimum rate of emergence close to 8000 cal years ago is explained by a decreased rate in isostatic uplift parallel with a sustained rate of eustatic sea-level rise. During the last 7000 cal years, the emergence rate has decreased linearly. The uplift rates have been slightly higher on southern Edgeøya than further north during the last 7000 years. By comparing the sea-level curves from Storøya (ca 270 km to the north) and Hopen (ca 150 km to the south), we suggest that a memory of an earlier and larger glacio-isostatic downwarping in the southern Barents Sea is detected in the sea-level curves from Hopen and southern Edgeøya. Article in Journal/Newspaper Arctic Barents Sea Barentsøya Edgeøya Hopen Polar Research Storøya Storøya Svalbard Hopen Polar Research (E-Journal) Arctic Svalbard Barents Sea Hopen ENVELOPE(9.279,9.279,63.379,63.379) Edgeøya ENVELOPE(22.500,22.500,77.750,77.750) Barentsøya ENVELOPE(21.250,21.250,78.450,78.450) Storøya ENVELOPE(7.761,7.761,62.515,62.515) Polar Research 14 2 153 180 |
institution |
Open Polar |
collection |
Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
description |
Four relative sea-level curves from Edgeøya and Barentsøya are constructed based on 81 radiocarbon age determinations on carefully selected and levelled samples in raised beaches, mostly driftwood embedded in beach gravel. All the dates, covering the period from the deglaciation to the present, are calibrated to calendar years, and the sea-level curves are defined by fitting the data with a least square regression curve. The dates are internally very consistent, and the results are some of the most precise sea-level curves from the Arctic. The four curves are quite similar, and from the marine limit at 85-90 m a.s.l. they show a rapid emergence (ca 40 mm/year), formed about 11,000 cal yrs BP (?10,00014C yrs BP). A minimum rate of emergence close to 8000 cal years ago is explained by a decreased rate in isostatic uplift parallel with a sustained rate of eustatic sea-level rise. During the last 7000 cal years, the emergence rate has decreased linearly. The uplift rates have been slightly higher on southern Edgeøya than further north during the last 7000 years. By comparing the sea-level curves from Storøya (ca 270 km to the north) and Hopen (ca 150 km to the south), we suggest that a memory of an earlier and larger glacio-isostatic downwarping in the southern Barents Sea is detected in the sea-level curves from Hopen and southern Edgeøya. |
format |
Article in Journal/Newspaper |
author |
Bondevik, Stein Mangerud, Jan Ronnert, Lars Salvigsen, Otto |
spellingShingle |
Bondevik, Stein Mangerud, Jan Ronnert, Lars Salvigsen, Otto Postglacial sea-level history of Edgeøya and Barentsøya, eastern Svalbard |
author_facet |
Bondevik, Stein Mangerud, Jan Ronnert, Lars Salvigsen, Otto |
author_sort |
Bondevik, Stein |
title |
Postglacial sea-level history of Edgeøya and Barentsøya, eastern Svalbard |
title_short |
Postglacial sea-level history of Edgeøya and Barentsøya, eastern Svalbard |
title_full |
Postglacial sea-level history of Edgeøya and Barentsøya, eastern Svalbard |
title_fullStr |
Postglacial sea-level history of Edgeøya and Barentsøya, eastern Svalbard |
title_full_unstemmed |
Postglacial sea-level history of Edgeøya and Barentsøya, eastern Svalbard |
title_sort |
postglacial sea-level history of edgeøya and barentsøya, eastern svalbard |
publisher |
Norwegian Polar Institute |
publishDate |
1995 |
url |
https://polarresearch.net/index.php/polar/article/view/1945 https://doi.org/10.3402/polar.v14i2.6661 |
long_lat |
ENVELOPE(9.279,9.279,63.379,63.379) ENVELOPE(22.500,22.500,77.750,77.750) ENVELOPE(21.250,21.250,78.450,78.450) ENVELOPE(7.761,7.761,62.515,62.515) |
geographic |
Arctic Svalbard Barents Sea Hopen Edgeøya Barentsøya Storøya |
geographic_facet |
Arctic Svalbard Barents Sea Hopen Edgeøya Barentsøya Storøya |
genre |
Arctic Barents Sea Barentsøya Edgeøya Hopen Polar Research Storøya Storøya Svalbard Hopen |
genre_facet |
Arctic Barents Sea Barentsøya Edgeøya Hopen Polar Research Storøya Storøya Svalbard Hopen |
op_source |
Polar Research; Vol. 14 No. 2 (1995): Special issue: the PONAM project in eastern Svalbard; 153-180 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/1945/5194 https://polarresearch.net/index.php/polar/article/view/1945 doi:10.3402/polar.v14i2.6661 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v14i2.6661 |
container_title |
Polar Research |
container_volume |
14 |
container_issue |
2 |
container_start_page |
153 |
op_container_end_page |
180 |
_version_ |
1766340215077601280 |