Southern ocean–sea-ice interaction: implications for climate and modelling
ABSTRACT The ocean/sea-ice interaction of the Antarctic open ocean region is described through a one-dimensional model. The model includes processes responsible for maintaining stability in this marginally stable region and reveals the importance of the various processes controlling deep water forma...
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Cambridge University Press (CUP)
1990
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Online Access: | http://dx.doi.org/10.1017/s0263593300020885 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0263593300020885 |
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crcambridgeupr:10.1017/s0263593300020885 2024-03-03T08:38:26+00:00 Southern ocean–sea-ice interaction: implications for climate and modelling Martinson, Douglas G. 1990 http://dx.doi.org/10.1017/s0263593300020885 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0263593300020885 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Transactions of the Royal Society of Edinburgh: Earth Sciences volume 81, issue 4, page 397-405 ISSN 0263-5933 1473-7116 Paleontology Earth and Planetary Sciences (miscellaneous) journal-article 1990 crcambridgeupr https://doi.org/10.1017/s0263593300020885 2024-02-08T08:28:03Z ABSTRACT The ocean/sea-ice interaction of the Antarctic open ocean region is described through a one-dimensional model. The model includes processes responsible for maintaining stability in this marginally stable region and reveals the importance of the various processes controlling deep water formation/ventilation and sea-ice thickness and their sensitivity to climate change. This information is used to estimate changes, as they impact water column stability, induced by glacial conditions. Increased stability is conducive to greater ice cover and less deep water formation/ventilation; decreased stability conducive to the opposite. Sensitivity studies show that the system is destabilised given: (1) shallowing of the pycnocline (induced by increased gyre vigor); (2) decrease in the ratio of heat to salt through the pycnocline (induced by introducing a colder and/or saltier deep water or by increasing the salinity of the surface water); (3) decreased pycnocline strength (induced by a fresher deep water or saltier surface water) and (4) increased atmospheric heat loss. Most of the assumed glacial conditions drive the system toward destabilisation, but the critical effect of changes in NADW characteristics depends strongly on the temperature and salinity of the replacement water. The importance of this deep water influence is evident today—as little as 3Wm −2 in the upper ocean heat balance or an additional 15 cm of ice growth is sufficient to overturn the water column in some regions. Article in Journal/Newspaper Antarc* Antarctic NADW Sea ice Southern Ocean Cambridge University Press Antarctic Southern Ocean The Antarctic Transactions of the Royal Society of Edinburgh: Earth Sciences 81 4 397 405 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Paleontology Earth and Planetary Sciences (miscellaneous) |
spellingShingle |
Paleontology Earth and Planetary Sciences (miscellaneous) Martinson, Douglas G. Southern ocean–sea-ice interaction: implications for climate and modelling |
topic_facet |
Paleontology Earth and Planetary Sciences (miscellaneous) |
description |
ABSTRACT The ocean/sea-ice interaction of the Antarctic open ocean region is described through a one-dimensional model. The model includes processes responsible for maintaining stability in this marginally stable region and reveals the importance of the various processes controlling deep water formation/ventilation and sea-ice thickness and their sensitivity to climate change. This information is used to estimate changes, as they impact water column stability, induced by glacial conditions. Increased stability is conducive to greater ice cover and less deep water formation/ventilation; decreased stability conducive to the opposite. Sensitivity studies show that the system is destabilised given: (1) shallowing of the pycnocline (induced by increased gyre vigor); (2) decrease in the ratio of heat to salt through the pycnocline (induced by introducing a colder and/or saltier deep water or by increasing the salinity of the surface water); (3) decreased pycnocline strength (induced by a fresher deep water or saltier surface water) and (4) increased atmospheric heat loss. Most of the assumed glacial conditions drive the system toward destabilisation, but the critical effect of changes in NADW characteristics depends strongly on the temperature and salinity of the replacement water. The importance of this deep water influence is evident today—as little as 3Wm −2 in the upper ocean heat balance or an additional 15 cm of ice growth is sufficient to overturn the water column in some regions. |
format |
Article in Journal/Newspaper |
author |
Martinson, Douglas G. |
author_facet |
Martinson, Douglas G. |
author_sort |
Martinson, Douglas G. |
title |
Southern ocean–sea-ice interaction: implications for climate and modelling |
title_short |
Southern ocean–sea-ice interaction: implications for climate and modelling |
title_full |
Southern ocean–sea-ice interaction: implications for climate and modelling |
title_fullStr |
Southern ocean–sea-ice interaction: implications for climate and modelling |
title_full_unstemmed |
Southern ocean–sea-ice interaction: implications for climate and modelling |
title_sort |
southern ocean–sea-ice interaction: implications for climate and modelling |
publisher |
Cambridge University Press (CUP) |
publishDate |
1990 |
url |
http://dx.doi.org/10.1017/s0263593300020885 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0263593300020885 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic NADW Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic NADW Sea ice Southern Ocean |
op_source |
Transactions of the Royal Society of Edinburgh: Earth Sciences volume 81, issue 4, page 397-405 ISSN 0263-5933 1473-7116 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0263593300020885 |
container_title |
Transactions of the Royal Society of Edinburgh: Earth Sciences |
container_volume |
81 |
container_issue |
4 |
container_start_page |
397 |
op_container_end_page |
405 |
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1792506815794118656 |