On available energy in the ocean and its application to the Barents Sea
International audience Following meteorological practice the definition of available potential energy in the ocean is conventionally defined in terms of the properties of the global ocean. However there is also a requirement for a localised definition, for example the energy released when shelf wate...
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ftccsdartic:oai:HAL:hal-00298487v1 2023-11-12T04:11:30+01:00 On available energy in the ocean and its application to the Barents Sea Levine, R. C. Webb, D. J. Department of Geography Department of geography National Oceanography Centre Southampton (NOC) University of Southampton 2007-11-27 https://hal.science/hal-00298487 https://hal.science/hal-00298487/document https://hal.science/hal-00298487/file/osd-4-897-2007.pdf en eng HAL CCSD European Geosciences Union hal-00298487 https://hal.science/hal-00298487 https://hal.science/hal-00298487/document https://hal.science/hal-00298487/file/osd-4-897-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 1812-0806 EISSN: 1812-0822 Ocean Science Discussions https://hal.science/hal-00298487 Ocean Science Discussions, 2007, 4 (6), pp.897-931 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2007 ftccsdartic 2023-10-21T23:15:03Z International audience Following meteorological practice the definition of available potential energy in the ocean is conventionally defined in terms of the properties of the global ocean. However there is also a requirement for a localised definition, for example the energy released when shelf water cascades down a continental shelf in the Arctic and enters a boundary current. In this note we start from first principals to obtain an exact expression for the available energy ( AE ) in such a situation. We show that the available energy depends on enstrophy and gravity. We also show that it is exactly equal to the work done by the pressure gradient and by buoyancy. The results are used to investigate the distribution of AE in the Barents Sea and surrounding regions relative to the interior of the Arctic Ocean. We find that water entering the Barents Sea from the Atlantic already has a high AE , that it is increased by cooling but that much of the increase is lost overcoming turbulence during the passage through the region to the Arctic Ocean. However on entering the Arctic enough available energy remains to drive a significant current around the margin of the ocean. The core of raised available energy also acts as a tracer which can be followed along the continental slope beyond the dateline. Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Arctic Ocean Barents Sea |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Levine, R. C. Webb, D. J. On available energy in the ocean and its application to the Barents Sea |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Following meteorological practice the definition of available potential energy in the ocean is conventionally defined in terms of the properties of the global ocean. However there is also a requirement for a localised definition, for example the energy released when shelf water cascades down a continental shelf in the Arctic and enters a boundary current. In this note we start from first principals to obtain an exact expression for the available energy ( AE ) in such a situation. We show that the available energy depends on enstrophy and gravity. We also show that it is exactly equal to the work done by the pressure gradient and by buoyancy. The results are used to investigate the distribution of AE in the Barents Sea and surrounding regions relative to the interior of the Arctic Ocean. We find that water entering the Barents Sea from the Atlantic already has a high AE , that it is increased by cooling but that much of the increase is lost overcoming turbulence during the passage through the region to the Arctic Ocean. However on entering the Arctic enough available energy remains to drive a significant current around the margin of the ocean. The core of raised available energy also acts as a tracer which can be followed along the continental slope beyond the dateline. |
author2 |
Department of Geography Department of geography National Oceanography Centre Southampton (NOC) University of Southampton |
format |
Article in Journal/Newspaper |
author |
Levine, R. C. Webb, D. J. |
author_facet |
Levine, R. C. Webb, D. J. |
author_sort |
Levine, R. C. |
title |
On available energy in the ocean and its application to the Barents Sea |
title_short |
On available energy in the ocean and its application to the Barents Sea |
title_full |
On available energy in the ocean and its application to the Barents Sea |
title_fullStr |
On available energy in the ocean and its application to the Barents Sea |
title_full_unstemmed |
On available energy in the ocean and its application to the Barents Sea |
title_sort |
on available energy in the ocean and its application to the barents sea |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00298487 https://hal.science/hal-00298487/document https://hal.science/hal-00298487/file/osd-4-897-2007.pdf |
geographic |
Arctic Arctic Ocean Barents Sea |
geographic_facet |
Arctic Arctic Ocean Barents Sea |
genre |
Arctic Arctic Ocean Barents Sea |
genre_facet |
Arctic Arctic Ocean Barents Sea |
op_source |
ISSN: 1812-0806 EISSN: 1812-0822 Ocean Science Discussions https://hal.science/hal-00298487 Ocean Science Discussions, 2007, 4 (6), pp.897-931 |
op_relation |
hal-00298487 https://hal.science/hal-00298487 https://hal.science/hal-00298487/document https://hal.science/hal-00298487/file/osd-4-897-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782330575316582400 |