On the Deterioration of a Grounded Iceberg
Abstract This paper examines the deterioration of an iceberg grounded outside St. John’s Harbour, Newfoundland, Canada, in terms of its initial velocity prior to grounding. Theoretical expressions for the lifting of the iceberg and hence its buoyancy loss during grounding are derived as a function o...
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Cambridge University Press (CUP)
1986
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Online Access: | http://dx.doi.org/10.1017/s0022143000015471 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000015471 |
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crcambridgeupr:10.1017/s0022143000015471 2024-03-03T08:46:09+00:00 On the Deterioration of a Grounded Iceberg Venkatesh, S. 1986 http://dx.doi.org/10.1017/s0022143000015471 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000015471 en eng Cambridge University Press (CUP) Journal of Glaciology volume 32, issue 111, page 161-167 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1986 crcambridgeupr https://doi.org/10.1017/s0022143000015471 2024-02-08T08:39:08Z Abstract This paper examines the deterioration of an iceberg grounded outside St. John’s Harbour, Newfoundland, Canada, in terms of its initial velocity prior to grounding. Theoretical expressions for the lifting of the iceberg and hence its buoyancy loss during grounding are derived as a function of initial iceberg velocity and ocean-bottom slope. Wave erosion and calving are two of the most significant mechanisms for iceberg deterioration. With wave erosion occurring on the seaward side of the grounded iceberg, model simulations are compared with observational data from a field study conducted on the grounded iceberg between 10 and 17 June 1983. Model–simulated time of re-flotation of the iceberg agrees with observations, for initial iceberg velocity of 0.3–0.5 m/s. Model simulations of the deterioration of the iceberg beyond the point of re-flotation are also compared with observations. Allowing for a 10% error in the observed above-water volume of the iceberg on 10 June, the model-simulated mass losses are in good agreement with observations. Best results are obtained for the model initialized with data observed on 14 June 1983, the first day for which detailed observational data are available following re-flotation of the iceberg. Article in Journal/Newspaper Journal of Glaciology Newfoundland Cambridge University Press Canada Journal of Glaciology 32 111 161 167 |
institution |
Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Venkatesh, S. On the Deterioration of a Grounded Iceberg |
topic_facet |
Earth-Surface Processes |
description |
Abstract This paper examines the deterioration of an iceberg grounded outside St. John’s Harbour, Newfoundland, Canada, in terms of its initial velocity prior to grounding. Theoretical expressions for the lifting of the iceberg and hence its buoyancy loss during grounding are derived as a function of initial iceberg velocity and ocean-bottom slope. Wave erosion and calving are two of the most significant mechanisms for iceberg deterioration. With wave erosion occurring on the seaward side of the grounded iceberg, model simulations are compared with observational data from a field study conducted on the grounded iceberg between 10 and 17 June 1983. Model–simulated time of re-flotation of the iceberg agrees with observations, for initial iceberg velocity of 0.3–0.5 m/s. Model simulations of the deterioration of the iceberg beyond the point of re-flotation are also compared with observations. Allowing for a 10% error in the observed above-water volume of the iceberg on 10 June, the model-simulated mass losses are in good agreement with observations. Best results are obtained for the model initialized with data observed on 14 June 1983, the first day for which detailed observational data are available following re-flotation of the iceberg. |
format |
Article in Journal/Newspaper |
author |
Venkatesh, S. |
author_facet |
Venkatesh, S. |
author_sort |
Venkatesh, S. |
title |
On the Deterioration of a Grounded Iceberg |
title_short |
On the Deterioration of a Grounded Iceberg |
title_full |
On the Deterioration of a Grounded Iceberg |
title_fullStr |
On the Deterioration of a Grounded Iceberg |
title_full_unstemmed |
On the Deterioration of a Grounded Iceberg |
title_sort |
on the deterioration of a grounded iceberg |
publisher |
Cambridge University Press (CUP) |
publishDate |
1986 |
url |
http://dx.doi.org/10.1017/s0022143000015471 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000015471 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Journal of Glaciology Newfoundland |
genre_facet |
Journal of Glaciology Newfoundland |
op_source |
Journal of Glaciology volume 32, issue 111, page 161-167 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000015471 |
container_title |
Journal of Glaciology |
container_volume |
32 |
container_issue |
111 |
container_start_page |
161 |
op_container_end_page |
167 |
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1792502132326268928 |