Southern hemisphere climate system recovery from instantaneous sea ice removal
A coupled atmosphere-sea-ice model has been used to investigate the temporal response to instantaneous Antarctic sea-ice removal under the present external climate conditions. In all cases the system was seen to be transitive, in that the sea ice eventually grew back to the present climate condition...
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Online Access: | https://doi.org/10.1256/smsqj.53502 http://ecite.utas.edu.au/9263 |
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ftunivtasecite:oai:ecite.utas.edu.au:9263 2023-05-15T13:56:40+02:00 Southern hemisphere climate system recovery from instantaneous sea ice removal Wu, X Simmonds, I Budd, WF 1996 https://doi.org/10.1256/smsqj.53502 http://ecite.utas.edu.au/9263 en eng Royal Meteorological Soc http://dx.doi.org/10.1256/smsqj.53502 Wu, X and Simmonds, I and Budd, WF, Southern hemisphere climate system recovery from instantaneous sea ice removal, Quarterly Journal of the Royal Meteorological Society, 122, (535) pp. 1501-1520. ISSN 0035-9009 (1996) [Refereed Article] http://ecite.utas.edu.au/9263 Earth Sciences Atmospheric Sciences Meteorology Refereed Article PeerReviewed 1996 ftunivtasecite https://doi.org/10.1256/smsqj.53502 2019-12-13T20:55:25Z A coupled atmosphere-sea-ice model has been used to investigate the temporal response to instantaneous Antarctic sea-ice removal under the present external climate conditions. In all cases the system was seen to be transitive, in that the sea ice eventually grew back to the present climate conditions. Here we examine the timescale and nature of the ice and atmospheric relaxation back to 'control' conditions. Several experiments were carried out, either supposing that all the sea ice was removed at certain times of year, or that it was removed only over certain large areas. The model in each case was run for six realizations for the equivalent of several years to a new equilibrium. For the 'whole sea-ice removal' experiment the maximum impact was found to occur when the removal was made at the time of sea-ice maximum (September) and least reaction near the minimum. In both cases the return to normal occured by the middle of the following winter. The atmospheric responses comprised reduced surface pressure over the area from which ice had been removed, greatly increased turbulent fluxes, reduced difference between precipitation and evaporation (P - E) over the ocean and increased (P - E) over the Antarctic continent. The air temperature changes spread through the troposphere and tended to reduce the circumpolar westerlies north of and over the sea-ice zone. The reaction to the regional sea-ice removals was more local and depended on where the region was located relative to the mean circulation pattern around and over Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice eCite UTAS (University of Tasmania) Antarctic The Antarctic Quarterly Journal of the Royal Meteorological Society 122 535 1501 1520 |
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English |
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Earth Sciences Atmospheric Sciences Meteorology |
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Earth Sciences Atmospheric Sciences Meteorology Wu, X Simmonds, I Budd, WF Southern hemisphere climate system recovery from instantaneous sea ice removal |
topic_facet |
Earth Sciences Atmospheric Sciences Meteorology |
description |
A coupled atmosphere-sea-ice model has been used to investigate the temporal response to instantaneous Antarctic sea-ice removal under the present external climate conditions. In all cases the system was seen to be transitive, in that the sea ice eventually grew back to the present climate conditions. Here we examine the timescale and nature of the ice and atmospheric relaxation back to 'control' conditions. Several experiments were carried out, either supposing that all the sea ice was removed at certain times of year, or that it was removed only over certain large areas. The model in each case was run for six realizations for the equivalent of several years to a new equilibrium. For the 'whole sea-ice removal' experiment the maximum impact was found to occur when the removal was made at the time of sea-ice maximum (September) and least reaction near the minimum. In both cases the return to normal occured by the middle of the following winter. The atmospheric responses comprised reduced surface pressure over the area from which ice had been removed, greatly increased turbulent fluxes, reduced difference between precipitation and evaporation (P - E) over the ocean and increased (P - E) over the Antarctic continent. The air temperature changes spread through the troposphere and tended to reduce the circumpolar westerlies north of and over the sea-ice zone. The reaction to the regional sea-ice removals was more local and depended on where the region was located relative to the mean circulation pattern around and over Antarctica. |
format |
Article in Journal/Newspaper |
author |
Wu, X Simmonds, I Budd, WF |
author_facet |
Wu, X Simmonds, I Budd, WF |
author_sort |
Wu, X |
title |
Southern hemisphere climate system recovery from instantaneous sea ice removal |
title_short |
Southern hemisphere climate system recovery from instantaneous sea ice removal |
title_full |
Southern hemisphere climate system recovery from instantaneous sea ice removal |
title_fullStr |
Southern hemisphere climate system recovery from instantaneous sea ice removal |
title_full_unstemmed |
Southern hemisphere climate system recovery from instantaneous sea ice removal |
title_sort |
southern hemisphere climate system recovery from instantaneous sea ice removal |
publisher |
Royal Meteorological Soc |
publishDate |
1996 |
url |
https://doi.org/10.1256/smsqj.53502 http://ecite.utas.edu.au/9263 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_relation |
http://dx.doi.org/10.1256/smsqj.53502 Wu, X and Simmonds, I and Budd, WF, Southern hemisphere climate system recovery from instantaneous sea ice removal, Quarterly Journal of the Royal Meteorological Society, 122, (535) pp. 1501-1520. ISSN 0035-9009 (1996) [Refereed Article] http://ecite.utas.edu.au/9263 |
op_doi |
https://doi.org/10.1256/smsqj.53502 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
122 |
container_issue |
535 |
container_start_page |
1501 |
op_container_end_page |
1520 |
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1766264218211844096 |