An investigation of thermohaline circulation in Terra Nova Bay polynya
This paper addresses the study of the thermohaline circulation and convective processes induced by the presence of a coastal polynya in Terra Nova Bay (Ross Sea, Antarctica). These processes are analysed by means of oceanographic observations and numerical simulations. Time series of hydrological pa...
Published in: | Antarctic Science |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2002
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0954102002000615 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102002000615 |
id |
crcambridgeupr:10.1017/s0954102002000615 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0954102002000615 2024-06-23T07:47:55+00:00 An investigation of thermohaline circulation in Terra Nova Bay polynya Buffoni, G. Cappelletti, A. Picco, P. 2002 http://dx.doi.org/10.1017/s0954102002000615 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102002000615 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 14, issue 1, page 83-92 ISSN 0954-1020 1365-2079 journal-article 2002 crcambridgeupr https://doi.org/10.1017/s0954102002000615 2024-06-12T04:04:47Z This paper addresses the study of the thermohaline circulation and convective processes induced by the presence of a coastal polynya in Terra Nova Bay (Ross Sea, Antarctica). These processes are analysed by means of oceanographic observations and numerical simulations. Time series of hydrological parameters and currents show the High Salinity Shelf Water (HSSW) formation with the mixing of the water column down to great depths, and a seasonal cycle of kinetic energy. A two-dimensional time dependent model for the numerical simulation of the effects of polynya on the circulation has been implemented. This model allows estimation of the contribution of thermohaline forcing on the circulation pattern, the amount of ice production consistent with the observed salinity distribution and annual cycle of currents and the amount of HSSW exported. The thermohaline forcing due to the polynya is able to induce strong horizontal currents up to 40 cm s −1 near the polynya area, as well as vertical movements of the order of 1 cm s −1 . An annual ice production, ranging from 45 m to 90 m, mixes the water column at great depths, up to 750 m, and increases the salinity of the surface incoming waters up to 34.82. The estimated net north-eastward transport of HSSW ranges from 0.34 Sv to 1.23 Sv, depending on ice production. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Ross Sea Cambridge University Press Ross Sea Terra Nova Bay Antarctic Science 14 1 83 92 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
This paper addresses the study of the thermohaline circulation and convective processes induced by the presence of a coastal polynya in Terra Nova Bay (Ross Sea, Antarctica). These processes are analysed by means of oceanographic observations and numerical simulations. Time series of hydrological parameters and currents show the High Salinity Shelf Water (HSSW) formation with the mixing of the water column down to great depths, and a seasonal cycle of kinetic energy. A two-dimensional time dependent model for the numerical simulation of the effects of polynya on the circulation has been implemented. This model allows estimation of the contribution of thermohaline forcing on the circulation pattern, the amount of ice production consistent with the observed salinity distribution and annual cycle of currents and the amount of HSSW exported. The thermohaline forcing due to the polynya is able to induce strong horizontal currents up to 40 cm s −1 near the polynya area, as well as vertical movements of the order of 1 cm s −1 . An annual ice production, ranging from 45 m to 90 m, mixes the water column at great depths, up to 750 m, and increases the salinity of the surface incoming waters up to 34.82. The estimated net north-eastward transport of HSSW ranges from 0.34 Sv to 1.23 Sv, depending on ice production. |
format |
Article in Journal/Newspaper |
author |
Buffoni, G. Cappelletti, A. Picco, P. |
spellingShingle |
Buffoni, G. Cappelletti, A. Picco, P. An investigation of thermohaline circulation in Terra Nova Bay polynya |
author_facet |
Buffoni, G. Cappelletti, A. Picco, P. |
author_sort |
Buffoni, G. |
title |
An investigation of thermohaline circulation in Terra Nova Bay polynya |
title_short |
An investigation of thermohaline circulation in Terra Nova Bay polynya |
title_full |
An investigation of thermohaline circulation in Terra Nova Bay polynya |
title_fullStr |
An investigation of thermohaline circulation in Terra Nova Bay polynya |
title_full_unstemmed |
An investigation of thermohaline circulation in Terra Nova Bay polynya |
title_sort |
investigation of thermohaline circulation in terra nova bay polynya |
publisher |
Cambridge University Press (CUP) |
publishDate |
2002 |
url |
http://dx.doi.org/10.1017/s0954102002000615 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102002000615 |
geographic |
Ross Sea Terra Nova Bay |
geographic_facet |
Ross Sea Terra Nova Bay |
genre |
Antarc* Antarctic Science Antarctica Ross Sea |
genre_facet |
Antarc* Antarctic Science Antarctica Ross Sea |
op_source |
Antarctic Science volume 14, issue 1, page 83-92 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102002000615 |
container_title |
Antarctic Science |
container_volume |
14 |
container_issue |
1 |
container_start_page |
83 |
op_container_end_page |
92 |
_version_ |
1802638171612119040 |