Vertical Heat Transport by Ocean Circulation and the Role of Mechanical and Haline Forcing
Vertical transport of heat by ocean circulation is investigated using a coupled climate model and novel thermodynamic methods. Using a streamfunction in temperature–depth coordinates, cells are identified by whether they are thermally direct (flux heat upward) or indirect (flux heat downward). These...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.682.9856 2023-05-15T13:47:55+02:00 Vertical Heat Transport by Ocean Circulation and the Role of Mechanical and Haline Forcing Jan D. Zika Willem P. Sijp Matthew H. England The Pennsylvania State University CiteSeerX Archives 2012 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.682.9856 http://web.science.unsw.edu.au/%7Ematthew/zika_et_al_2013_JPO.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.682.9856 http://web.science.unsw.edu.au/%7Ematthew/zika_et_al_2013_JPO.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://web.science.unsw.edu.au/%7Ematthew/zika_et_al_2013_JPO.pdf text 2012 ftciteseerx 2016-01-08T17:59:20Z Vertical transport of heat by ocean circulation is investigated using a coupled climate model and novel thermodynamic methods. Using a streamfunction in temperature–depth coordinates, cells are identified by whether they are thermally direct (flux heat upward) or indirect (flux heat downward). These cells are then projected into geographical and other thermodynamic coordinates. Three cells are identified in the model: a thermally direct cell coincident with Antarctic BottomWater, a thermally indirect deep cell coincident with the upper limb of the meridional overturning circulation, and a thermally direct shallow cell coincident with the subtropical gyres at the surface. The mechanisms maintaining the thermally indirect deep cell are in-vestigated. Sinking water within the deep cell is more saline than that which upwells, because of the coupling between the upper limb and the subtropical gyres in a broader thermohaline circulation. Despite the higher salinity of its sinking water, the deep cell transports buoyancy downward, requiring a source of mechanical energy. Experiments run to steady state with increasing Southern Hemisphere westerlies show an increasing thermally indirect circulation. These results suggest that heat can be pumped downward by the upper limb of the meridional overturning circulation through a combination of salinity gain in the subtropics and the me-chanical forcing provided by Southern Hemisphere westerly winds. Text Antarc* Antarctic Unknown Antarctic |
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Vertical transport of heat by ocean circulation is investigated using a coupled climate model and novel thermodynamic methods. Using a streamfunction in temperature–depth coordinates, cells are identified by whether they are thermally direct (flux heat upward) or indirect (flux heat downward). These cells are then projected into geographical and other thermodynamic coordinates. Three cells are identified in the model: a thermally direct cell coincident with Antarctic BottomWater, a thermally indirect deep cell coincident with the upper limb of the meridional overturning circulation, and a thermally direct shallow cell coincident with the subtropical gyres at the surface. The mechanisms maintaining the thermally indirect deep cell are in-vestigated. Sinking water within the deep cell is more saline than that which upwells, because of the coupling between the upper limb and the subtropical gyres in a broader thermohaline circulation. Despite the higher salinity of its sinking water, the deep cell transports buoyancy downward, requiring a source of mechanical energy. Experiments run to steady state with increasing Southern Hemisphere westerlies show an increasing thermally indirect circulation. These results suggest that heat can be pumped downward by the upper limb of the meridional overturning circulation through a combination of salinity gain in the subtropics and the me-chanical forcing provided by Southern Hemisphere westerly winds. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Jan D. Zika Willem P. Sijp Matthew H. England |
spellingShingle |
Jan D. Zika Willem P. Sijp Matthew H. England Vertical Heat Transport by Ocean Circulation and the Role of Mechanical and Haline Forcing |
author_facet |
Jan D. Zika Willem P. Sijp Matthew H. England |
author_sort |
Jan D. Zika |
title |
Vertical Heat Transport by Ocean Circulation and the Role of Mechanical and Haline Forcing |
title_short |
Vertical Heat Transport by Ocean Circulation and the Role of Mechanical and Haline Forcing |
title_full |
Vertical Heat Transport by Ocean Circulation and the Role of Mechanical and Haline Forcing |
title_fullStr |
Vertical Heat Transport by Ocean Circulation and the Role of Mechanical and Haline Forcing |
title_full_unstemmed |
Vertical Heat Transport by Ocean Circulation and the Role of Mechanical and Haline Forcing |
title_sort |
vertical heat transport by ocean circulation and the role of mechanical and haline forcing |
publishDate |
2012 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.682.9856 http://web.science.unsw.edu.au/%7Ematthew/zika_et_al_2013_JPO.pdf |
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Antarctic |
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Antarctic |
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Antarc* Antarctic |
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Antarc* Antarctic |
op_source |
http://web.science.unsw.edu.au/%7Ematthew/zika_et_al_2013_JPO.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.682.9856 http://web.science.unsw.edu.au/%7Ematthew/zika_et_al_2013_JPO.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766248015982493696 |