The sea ice dynamics of Terra Nova Bay and Ross Ice Shelf Polynyas during a spring and winter simulation
The Terra Nova Bay (TNB) and Ross Ice Shelf (RIS) polynyas are simulated using a coupled atmosphere–sea ice model in winter 2002 and summer 2000. The atmospheric component of the model is compared with Automatic Weather Stations (AWS) data and shows a significantly increased skill over the ECMWF atm...
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Online Access: | https://eprints.utas.edu.au/7744/ https://eprints.utas.edu.au/7744/1/Petrelli_2008.pdf https://doi.org/10.1029/2006JC004048 |
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ftunivtasmania:oai:eprints.utas.edu.au:7744 2023-05-15T16:41:53+02:00 The sea ice dynamics of Terra Nova Bay and Ross Ice Shelf Polynyas during a spring and winter simulation Petrelli, P Bindoff, NL Bergamasco, A 2008 application/pdf https://eprints.utas.edu.au/7744/ https://eprints.utas.edu.au/7744/1/Petrelli_2008.pdf https://doi.org/10.1029/2006JC004048 en eng https://eprints.utas.edu.au/7744/1/Petrelli_2008.pdf Petrelli, P, Bindoff, NL and Bergamasco, A 2008 , 'The sea ice dynamics of Terra Nova Bay and Ross Ice Shelf Polynyas during a spring and winter simulation' , Journal of Geophysical Research, vol. 113, no. C09003 , pp. 1-16 , doi:10.1029/2006JC004048 <http://dx.doi.org/10.1029/2006JC004048>. Article PeerReviewed 2008 ftunivtasmania https://doi.org/10.1029/2006JC004048 2020-05-30T07:21:29Z The Terra Nova Bay (TNB) and Ross Ice Shelf (RIS) polynyas are simulated using a coupled atmosphere–sea ice model in winter 2002 and summer 2000. The atmospheric component of the model is compared with Automatic Weather Stations (AWS) data and shows a significantly increased skill over the ECMWF atmospheric variables. During winter, the sea ice production in TNB is largely determined by katabatic winds. We estimate the monthly production rate to be 8.7 km3/month of sea ice during winter. In early summer (November), the katabatics are weaker and the sea ice production is more influenced by the synoptic wind. The net sea ice production is weaker during November at 1.2 km3/month. The summer production is characterized by a diurnal cycle of melt and sea ice formation. For small coastal polynyas, like TNB, it is important to resolve all the glacier valleys accurately. Increasing the model resolution by a factor of five leads to a doubling of the sea ice formation during winter simulations due to the point intensity of the katabatics winds. For open coastal polynyas, like RIS polynya, sea ice production is largely controlled by synoptic winds and resolution is less important. The RIS polynya production is 61.3 km3 during winter and 19.1 km3 during November. These results are comparable to RIS polynya observations. Although the TNB polynya has a smaller winter sea ice production, the sea ice rate of growth per unit area is 1.6 times that of the RIS polynya. Article in Journal/Newspaper Ice Shelf Ross Ice Shelf Sea ice University of Tasmania: UTas ePrints Ross Ice Shelf Terra Nova Bay Journal of Geophysical Research 113 C9 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
description |
The Terra Nova Bay (TNB) and Ross Ice Shelf (RIS) polynyas are simulated using a coupled atmosphere–sea ice model in winter 2002 and summer 2000. The atmospheric component of the model is compared with Automatic Weather Stations (AWS) data and shows a significantly increased skill over the ECMWF atmospheric variables. During winter, the sea ice production in TNB is largely determined by katabatic winds. We estimate the monthly production rate to be 8.7 km3/month of sea ice during winter. In early summer (November), the katabatics are weaker and the sea ice production is more influenced by the synoptic wind. The net sea ice production is weaker during November at 1.2 km3/month. The summer production is characterized by a diurnal cycle of melt and sea ice formation. For small coastal polynyas, like TNB, it is important to resolve all the glacier valleys accurately. Increasing the model resolution by a factor of five leads to a doubling of the sea ice formation during winter simulations due to the point intensity of the katabatics winds. For open coastal polynyas, like RIS polynya, sea ice production is largely controlled by synoptic winds and resolution is less important. The RIS polynya production is 61.3 km3 during winter and 19.1 km3 during November. These results are comparable to RIS polynya observations. Although the TNB polynya has a smaller winter sea ice production, the sea ice rate of growth per unit area is 1.6 times that of the RIS polynya. |
format |
Article in Journal/Newspaper |
author |
Petrelli, P Bindoff, NL Bergamasco, A |
spellingShingle |
Petrelli, P Bindoff, NL Bergamasco, A The sea ice dynamics of Terra Nova Bay and Ross Ice Shelf Polynyas during a spring and winter simulation |
author_facet |
Petrelli, P Bindoff, NL Bergamasco, A |
author_sort |
Petrelli, P |
title |
The sea ice dynamics of Terra Nova Bay and Ross Ice Shelf Polynyas during a spring and winter simulation |
title_short |
The sea ice dynamics of Terra Nova Bay and Ross Ice Shelf Polynyas during a spring and winter simulation |
title_full |
The sea ice dynamics of Terra Nova Bay and Ross Ice Shelf Polynyas during a spring and winter simulation |
title_fullStr |
The sea ice dynamics of Terra Nova Bay and Ross Ice Shelf Polynyas during a spring and winter simulation |
title_full_unstemmed |
The sea ice dynamics of Terra Nova Bay and Ross Ice Shelf Polynyas during a spring and winter simulation |
title_sort |
sea ice dynamics of terra nova bay and ross ice shelf polynyas during a spring and winter simulation |
publishDate |
2008 |
url |
https://eprints.utas.edu.au/7744/ https://eprints.utas.edu.au/7744/1/Petrelli_2008.pdf https://doi.org/10.1029/2006JC004048 |
geographic |
Ross Ice Shelf Terra Nova Bay |
geographic_facet |
Ross Ice Shelf Terra Nova Bay |
genre |
Ice Shelf Ross Ice Shelf Sea ice |
genre_facet |
Ice Shelf Ross Ice Shelf Sea ice |
op_relation |
https://eprints.utas.edu.au/7744/1/Petrelli_2008.pdf Petrelli, P, Bindoff, NL and Bergamasco, A 2008 , 'The sea ice dynamics of Terra Nova Bay and Ross Ice Shelf Polynyas during a spring and winter simulation' , Journal of Geophysical Research, vol. 113, no. C09003 , pp. 1-16 , doi:10.1029/2006JC004048 <http://dx.doi.org/10.1029/2006JC004048>. |
op_doi |
https://doi.org/10.1029/2006JC004048 |
container_title |
Journal of Geophysical Research |
container_volume |
113 |
container_issue |
C9 |
_version_ |
1766032353955676160 |