Decay of first year sea ice: a second season of field measurements: interim report
This report describes a field program that was undertaken to characterize the seasonal ice decay process using a second year of measurements. Ice property measurements were made and a borehole jack assembly was used to measure the in situ confined compressive strength (borehole strength) of the ice....
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National Research Council of Canada
2001
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Online Access: | https://doi.org/10.4224/12340939 https://nrc-publications.canada.ca/eng/view/ft/?id=5efb5197-64be-4af7-b6ad-e1080ef06688 https://nrc-publications.canada.ca/eng/view/object/?id=5efb5197-64be-4af7-b6ad-e1080ef06688 https://nrc-publications.canada.ca/fra/voir/objet/?id=5efb5197-64be-4af7-b6ad-e1080ef06688 |
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ftnrccanada:oai:cisti-icist.nrc-cnrc.ca:cistinparc:12340939 2023-05-15T18:18:24+02:00 Decay of first year sea ice: a second season of field measurements: interim report Johnston, M. Frederking, R. 2001-08 text 26 p. https://doi.org/10.4224/12340939 https://nrc-publications.canada.ca/eng/view/ft/?id=5efb5197-64be-4af7-b6ad-e1080ef06688 https://nrc-publications.canada.ca/eng/view/object/?id=5efb5197-64be-4af7-b6ad-e1080ef06688 https://nrc-publications.canada.ca/fra/voir/objet/?id=5efb5197-64be-4af7-b6ad-e1080ef06688 eng eng National Research Council of Canada Technical Report (National Research Council of Canada. Canadian Hydraulics Centre); no. HYD-TR-066, Publication date: 2001-08 doi:10.4224/12340939 open access technical report 2001 ftnrccanada https://doi.org/10.4224/12340939 2023-02-26T00:01:21Z This report describes a field program that was undertaken to characterize the seasonal ice decay process using a second year of measurements. Ice property measurements were made and a borehole jack assembly was used to measure the in situ confined compressive strength (borehole strength) of the ice. The project was conducted from 14 May to 28 June 2001 during which time the ice thickness ranged from 1.45 to 1.30 m. More than one hundred borehole jack tests were conducted at depths 0.3, 0.6, 0.9 and 1.2 m. No significant ice ablation occurred during the time that the borehole jack tests were conducted. Over the period mid-May to early June, the ice strength decreased by 50% in the top 0.50 m of ice. Measurements showed that the surface layer of ice decreased from a strength of 22 MPa to 10 MPa between mid May and early June. In comparison, the strength in the bottom layer of ice (depth 1.20 m) remained relatively constant (10 to 13 MPa) during that time. NRC publication: Yes Report Sea ice National Research Council Canada: NRC Publications Archive |
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Open Polar |
collection |
National Research Council Canada: NRC Publications Archive |
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ftnrccanada |
language |
English |
description |
This report describes a field program that was undertaken to characterize the seasonal ice decay process using a second year of measurements. Ice property measurements were made and a borehole jack assembly was used to measure the in situ confined compressive strength (borehole strength) of the ice. The project was conducted from 14 May to 28 June 2001 during which time the ice thickness ranged from 1.45 to 1.30 m. More than one hundred borehole jack tests were conducted at depths 0.3, 0.6, 0.9 and 1.2 m. No significant ice ablation occurred during the time that the borehole jack tests were conducted. Over the period mid-May to early June, the ice strength decreased by 50% in the top 0.50 m of ice. Measurements showed that the surface layer of ice decreased from a strength of 22 MPa to 10 MPa between mid May and early June. In comparison, the strength in the bottom layer of ice (depth 1.20 m) remained relatively constant (10 to 13 MPa) during that time. NRC publication: Yes |
format |
Report |
author |
Johnston, M. Frederking, R. |
spellingShingle |
Johnston, M. Frederking, R. Decay of first year sea ice: a second season of field measurements: interim report |
author_facet |
Johnston, M. Frederking, R. |
author_sort |
Johnston, M. |
title |
Decay of first year sea ice: a second season of field measurements: interim report |
title_short |
Decay of first year sea ice: a second season of field measurements: interim report |
title_full |
Decay of first year sea ice: a second season of field measurements: interim report |
title_fullStr |
Decay of first year sea ice: a second season of field measurements: interim report |
title_full_unstemmed |
Decay of first year sea ice: a second season of field measurements: interim report |
title_sort |
decay of first year sea ice: a second season of field measurements: interim report |
publisher |
National Research Council of Canada |
publishDate |
2001 |
url |
https://doi.org/10.4224/12340939 https://nrc-publications.canada.ca/eng/view/ft/?id=5efb5197-64be-4af7-b6ad-e1080ef06688 https://nrc-publications.canada.ca/eng/view/object/?id=5efb5197-64be-4af7-b6ad-e1080ef06688 https://nrc-publications.canada.ca/fra/voir/objet/?id=5efb5197-64be-4af7-b6ad-e1080ef06688 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
Technical Report (National Research Council of Canada. Canadian Hydraulics Centre); no. HYD-TR-066, Publication date: 2001-08 doi:10.4224/12340939 |
op_rights |
open access |
op_doi |
https://doi.org/10.4224/12340939 |
_version_ |
1766194960786259968 |