Sea-ice motion in the Weddell Sea from drifting-buoy and AVHRR data
Abstract A study of sea ice in the northern Weddell Sea was done, relating the ice motion, determined using an array of satellite-tracked drifters, deployed into ice floes, to parameters describing the nature of the ice cover, obtained from an analysis of Advanced Very High Resolution Radiometer (AV...
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Cambridge University Press (CUP)
1996
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Online Access: | http://dx.doi.org/10.1017/s002214300000410x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300000410X |
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crcambridgeupr:10.1017/s002214300000410x 2024-03-03T08:46:04+00:00 Sea-ice motion in the Weddell Sea from drifting-buoy and AVHRR data Crane, David Wadhams, Peter 1996 http://dx.doi.org/10.1017/s002214300000410x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300000410X en eng Cambridge University Press (CUP) Journal of Glaciology volume 42, issue 141, page 249-254 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1996 crcambridgeupr https://doi.org/10.1017/s002214300000410x 2024-02-08T08:36:10Z Abstract A study of sea ice in the northern Weddell Sea was done, relating the ice motion, determined using an array of satellite-tracked drifters, deployed into ice floes, to parameters describing the nature of the ice cover, obtained from an analysis of Advanced Very High Resolution Radiometer (AVHRR) imagery. It was found that the ice motion was predominantly wind-driven, responding to the passage of low-pressure systems across the area. The correlation length of the strain field over the entire measurement period was around 200 km. At high concentrations the ice responded as a rigid body with coherent motion, but below a concentration of around 93%, differential motion occurred. The nature of the ice motion was found to depend upon the lead parameters, with low values of pure convergence and divergence and larger values of vorticity and deformation of the ice field. The vorticity was found to be well correlated with the atmospheric pressure, with a time lag of less than 3 h, implying an almost instantaneous response of the ice cover to meteorological forcing. Article in Journal/Newspaper Journal of Glaciology Sea ice Weddell Sea Cambridge University Press Weddell Sea Weddell Journal of Glaciology 42 141 249 254 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Crane, David Wadhams, Peter Sea-ice motion in the Weddell Sea from drifting-buoy and AVHRR data |
topic_facet |
Earth-Surface Processes |
description |
Abstract A study of sea ice in the northern Weddell Sea was done, relating the ice motion, determined using an array of satellite-tracked drifters, deployed into ice floes, to parameters describing the nature of the ice cover, obtained from an analysis of Advanced Very High Resolution Radiometer (AVHRR) imagery. It was found that the ice motion was predominantly wind-driven, responding to the passage of low-pressure systems across the area. The correlation length of the strain field over the entire measurement period was around 200 km. At high concentrations the ice responded as a rigid body with coherent motion, but below a concentration of around 93%, differential motion occurred. The nature of the ice motion was found to depend upon the lead parameters, with low values of pure convergence and divergence and larger values of vorticity and deformation of the ice field. The vorticity was found to be well correlated with the atmospheric pressure, with a time lag of less than 3 h, implying an almost instantaneous response of the ice cover to meteorological forcing. |
format |
Article in Journal/Newspaper |
author |
Crane, David Wadhams, Peter |
author_facet |
Crane, David Wadhams, Peter |
author_sort |
Crane, David |
title |
Sea-ice motion in the Weddell Sea from drifting-buoy and AVHRR data |
title_short |
Sea-ice motion in the Weddell Sea from drifting-buoy and AVHRR data |
title_full |
Sea-ice motion in the Weddell Sea from drifting-buoy and AVHRR data |
title_fullStr |
Sea-ice motion in the Weddell Sea from drifting-buoy and AVHRR data |
title_full_unstemmed |
Sea-ice motion in the Weddell Sea from drifting-buoy and AVHRR data |
title_sort |
sea-ice motion in the weddell sea from drifting-buoy and avhrr data |
publisher |
Cambridge University Press (CUP) |
publishDate |
1996 |
url |
http://dx.doi.org/10.1017/s002214300000410x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300000410X |
geographic |
Weddell Sea Weddell |
geographic_facet |
Weddell Sea Weddell |
genre |
Journal of Glaciology Sea ice Weddell Sea |
genre_facet |
Journal of Glaciology Sea ice Weddell Sea |
op_source |
Journal of Glaciology volume 42, issue 141, page 249-254 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s002214300000410x |
container_title |
Journal of Glaciology |
container_volume |
42 |
container_issue |
141 |
container_start_page |
249 |
op_container_end_page |
254 |
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1792501941010432000 |