A field and numerical study of the evolution of sea-ice thickness in the Ross Sea, Antarctica, 1998-99
During two cruises in 1998 and 1999, we examined drift and ridging characteristics of sea ice in the Ross Sea, Antarctica. Mean ice thickness in the western Ross Sea in autumn was 0.5 m, while higher level-ice thicknesses, greater areal coverages of ridges and higher sails were found in the central...
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Online Access: | http://hdl.handle.net/2078.1/39259 https://doi.org/10.3189/172756504781829990 |
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:39259 2024-05-12T07:54:05+00:00 A field and numerical study of the evolution of sea-ice thickness in the Ross Sea, Antarctica, 1998-99 Tin, T Timmermann, R Jeffries, MO UCL 2004 http://hdl.handle.net/2078.1/39259 https://doi.org/10.3189/172756504781829990 eng eng Int Glaciol Soc boreal:39259 http://hdl.handle.net/2078.1/39259 doi:10.3189/172756504781829990 urn:ISSN:0022-1430 urn:EISSN:1727-5652 Journal of Glaciology, Vol. 50, no. 170, p. 436-446 (2004) info:eu-repo/semantics/article 2004 ftunistlouisbrus https://doi.org/10.3189/172756504781829990 2024-04-18T18:15:11Z During two cruises in 1998 and 1999, we examined drift and ridging characteristics of sea ice in the Ross Sea, Antarctica. Mean ice thickness in the western Ross Sea in autumn was 0.5 m, while higher level-ice thicknesses, greater areal coverages of ridges and higher sails were found in the central and eastern Ross Sea in summer. Near the continent, ice drifted westward near the coast and turned eastward further north. We use a regional sea-ice-mixed-layer-pycnocline model to initiate backward trajectories at the time and location of field observations and examine the dynamic and thermodynamic processes that determine ice thickness along these trajectories. Model results agree with previously published field data to indicate that thermodynamic and dynamic thickening and snow-ice formation each contribute significantly to the ice mass of the summer ice field in the central and eastern Ross Sea. For first-year ice in the western Ross Sea, model results and field data both indicate that thermodynamic thickening is the dominant process that determines ice thickness, with dynamic thickening also contributing 20% to the net ice-thickening rate. However, model results fail to reproduce the prevalence of snow-ice formation that was seen in field data. Article in Journal/Newspaper Antarc* Antarctica Journal of Glaciology Ross Sea Sea ice DIAL@USL-B (Université Saint-Louis, Bruxelles) Ross Sea Journal of Glaciology 50 170 436 446 |
institution |
Open Polar |
collection |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
description |
During two cruises in 1998 and 1999, we examined drift and ridging characteristics of sea ice in the Ross Sea, Antarctica. Mean ice thickness in the western Ross Sea in autumn was 0.5 m, while higher level-ice thicknesses, greater areal coverages of ridges and higher sails were found in the central and eastern Ross Sea in summer. Near the continent, ice drifted westward near the coast and turned eastward further north. We use a regional sea-ice-mixed-layer-pycnocline model to initiate backward trajectories at the time and location of field observations and examine the dynamic and thermodynamic processes that determine ice thickness along these trajectories. Model results agree with previously published field data to indicate that thermodynamic and dynamic thickening and snow-ice formation each contribute significantly to the ice mass of the summer ice field in the central and eastern Ross Sea. For first-year ice in the western Ross Sea, model results and field data both indicate that thermodynamic thickening is the dominant process that determines ice thickness, with dynamic thickening also contributing 20% to the net ice-thickening rate. However, model results fail to reproduce the prevalence of snow-ice formation that was seen in field data. |
author2 |
UCL |
format |
Article in Journal/Newspaper |
author |
Tin, T Timmermann, R Jeffries, MO |
spellingShingle |
Tin, T Timmermann, R Jeffries, MO A field and numerical study of the evolution of sea-ice thickness in the Ross Sea, Antarctica, 1998-99 |
author_facet |
Tin, T Timmermann, R Jeffries, MO |
author_sort |
Tin, T |
title |
A field and numerical study of the evolution of sea-ice thickness in the Ross Sea, Antarctica, 1998-99 |
title_short |
A field and numerical study of the evolution of sea-ice thickness in the Ross Sea, Antarctica, 1998-99 |
title_full |
A field and numerical study of the evolution of sea-ice thickness in the Ross Sea, Antarctica, 1998-99 |
title_fullStr |
A field and numerical study of the evolution of sea-ice thickness in the Ross Sea, Antarctica, 1998-99 |
title_full_unstemmed |
A field and numerical study of the evolution of sea-ice thickness in the Ross Sea, Antarctica, 1998-99 |
title_sort |
field and numerical study of the evolution of sea-ice thickness in the ross sea, antarctica, 1998-99 |
publisher |
Int Glaciol Soc |
publishDate |
2004 |
url |
http://hdl.handle.net/2078.1/39259 https://doi.org/10.3189/172756504781829990 |
geographic |
Ross Sea |
geographic_facet |
Ross Sea |
genre |
Antarc* Antarctica Journal of Glaciology Ross Sea Sea ice |
genre_facet |
Antarc* Antarctica Journal of Glaciology Ross Sea Sea ice |
op_source |
Journal of Glaciology, Vol. 50, no. 170, p. 436-446 (2004) |
op_relation |
boreal:39259 http://hdl.handle.net/2078.1/39259 doi:10.3189/172756504781829990 urn:ISSN:0022-1430 urn:EISSN:1727-5652 |
op_doi |
https://doi.org/10.3189/172756504781829990 |
container_title |
Journal of Glaciology |
container_volume |
50 |
container_issue |
170 |
container_start_page |
436 |
op_container_end_page |
446 |
_version_ |
1798846702111686656 |