Shallow sediment temperature perturbations and sediment thermal conductivities, Canadian Beaufort Shelf
A regional survey of sediment temperatures and thermal conductivities was conducted at 33 stations across the outer shelf of the Canadian Beaufort Sea. Techniques developed for deep-ocean heat-flow investigations were used to study the upper 3 m of sediments. Temperature–depth profiles exhibit curva...
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1987
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crcansciencepubl:10.1139/e87-210 2023-12-17T10:27:56+01:00 Shallow sediment temperature perturbations and sediment thermal conductivities, Canadian Beaufort Shelf Taylor, Alan E. Allen, Vic 1987 http://dx.doi.org/10.1139/e87-210 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-210 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 24, issue 11, page 2223-2234 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1987 crcansciencepubl https://doi.org/10.1139/e87-210 2023-11-19T13:39:26Z A regional survey of sediment temperatures and thermal conductivities was conducted at 33 stations across the outer shelf of the Canadian Beaufort Sea. Techniques developed for deep-ocean heat-flow investigations were used to study the upper 3 m of sediments. Temperature–depth profiles exhibit curvatures that may be explained by seasonal changes in bottom-water temperature; some curvatures may arise from other causes. It is unlikely that thermal effects of the underlying, degradational permafrost can be detected from such shallow temperatures because of the magnitude of, and lack of independent knowledge of, these transient and local influences. Thermal conductivities measured on sediment cores and corrected to −1 °C range from 0.9 to 2.4 W m −1 K −1 (average 1.26 ± 0.2 W m −1 K −1 ). These values are higher than typical conductivities of deep-ocean sediments. The wide range of thermal conductivities observed across the outer Beaufort Shelf may be explained by the presence of a varying fraction of quartz sand that represents a component of high conductivity. Article in Journal/Newspaper Beaufort Sea permafrost Canadian Science Publishing (via Crossref) Beaufort Shelf ENVELOPE(-142.500,-142.500,70.000,70.000) Canadian Journal of Earth Sciences 24 11 2223 2234 |
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Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Taylor, Alan E. Allen, Vic Shallow sediment temperature perturbations and sediment thermal conductivities, Canadian Beaufort Shelf |
topic_facet |
General Earth and Planetary Sciences |
description |
A regional survey of sediment temperatures and thermal conductivities was conducted at 33 stations across the outer shelf of the Canadian Beaufort Sea. Techniques developed for deep-ocean heat-flow investigations were used to study the upper 3 m of sediments. Temperature–depth profiles exhibit curvatures that may be explained by seasonal changes in bottom-water temperature; some curvatures may arise from other causes. It is unlikely that thermal effects of the underlying, degradational permafrost can be detected from such shallow temperatures because of the magnitude of, and lack of independent knowledge of, these transient and local influences. Thermal conductivities measured on sediment cores and corrected to −1 °C range from 0.9 to 2.4 W m −1 K −1 (average 1.26 ± 0.2 W m −1 K −1 ). These values are higher than typical conductivities of deep-ocean sediments. The wide range of thermal conductivities observed across the outer Beaufort Shelf may be explained by the presence of a varying fraction of quartz sand that represents a component of high conductivity. |
format |
Article in Journal/Newspaper |
author |
Taylor, Alan E. Allen, Vic |
author_facet |
Taylor, Alan E. Allen, Vic |
author_sort |
Taylor, Alan E. |
title |
Shallow sediment temperature perturbations and sediment thermal conductivities, Canadian Beaufort Shelf |
title_short |
Shallow sediment temperature perturbations and sediment thermal conductivities, Canadian Beaufort Shelf |
title_full |
Shallow sediment temperature perturbations and sediment thermal conductivities, Canadian Beaufort Shelf |
title_fullStr |
Shallow sediment temperature perturbations and sediment thermal conductivities, Canadian Beaufort Shelf |
title_full_unstemmed |
Shallow sediment temperature perturbations and sediment thermal conductivities, Canadian Beaufort Shelf |
title_sort |
shallow sediment temperature perturbations and sediment thermal conductivities, canadian beaufort shelf |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/e87-210 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-210 |
long_lat |
ENVELOPE(-142.500,-142.500,70.000,70.000) |
geographic |
Beaufort Shelf |
geographic_facet |
Beaufort Shelf |
genre |
Beaufort Sea permafrost |
genre_facet |
Beaufort Sea permafrost |
op_source |
Canadian Journal of Earth Sciences volume 24, issue 11, page 2223-2234 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e87-210 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
24 |
container_issue |
11 |
container_start_page |
2223 |
op_container_end_page |
2234 |
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1785579908491116544 |