The Adiabatic Pole-to-Pole Overturning Circulation
The adiabatic pole-to-pole cell of the residual overturning circulation (ROC) is studied in a twohemisphere, semienclosed basin, with a zonally reentrant channel occupying the southernmost eighth of the domain. Three different models of increasing complexity are used: a simple, analytically tractabl...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.220.7484 2023-05-15T13:34:58+02:00 The Adiabatic Pole-to-Pole Overturning Circulation Christopher L. Wolfe Paola Cessi The Pennsylvania State University CiteSeerX Archives 2010 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.220.7484 http://www-pord.ucsd.edu/%7Epcessi/wolfe_cessi_11.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.220.7484 http://www-pord.ucsd.edu/%7Epcessi/wolfe_cessi_11.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www-pord.ucsd.edu/%7Epcessi/wolfe_cessi_11.pdf text 2010 ftciteseerx 2016-01-07T18:18:09Z The adiabatic pole-to-pole cell of the residual overturning circulation (ROC) is studied in a twohemisphere, semienclosed basin, with a zonally reentrant channel occupying the southernmost eighth of the domain. Three different models of increasing complexity are used: a simple, analytically tractable zonally averaged model; a coarse-resolution numerical model with parameterized eddies; and an eddyresolving general circulation model. Two elements are found to be necessary for the existence of an adiabatic pole-to-pole cell: 1) a thermally indirect, wind-driven overturning circulation in the zonally reentrant channel, analogous to the Deacon cell in the Antarctic Circumpolar Current (ACC) region, and 2) a set of outcropping isopycnals shared between the channel and the semienclosed region of the Northern Hemisphere. These points are supported by several computations varying the domain geometry, the surface buoyancy distribution, and the wind forcing. All three models give results that are qualitatively very similar, indicating that the two requirements above are general and robust. The zonally averaged model parameterizes the streamfunction associated with adiabatic buoyancy fluxes as downgradient diffusion of buoyancy thickness, with a diffusivity in the semienclosed region of the Northern Hemisphere much larger than that in the ACC region. In the simple model, the disparity in diffusivities is necessary to obtain a substantial pole-to-pole ROC. The simple model also illustrates how the geometry of the isopycnals is shaped by the interhemispheric ROC, leading to three major thermostads, which the authors identify with the major water masses of the Atlantic: that is, North Atlantic Deep Water, Antarctic Intermediate Water, and Antarctic Bottom Water. 1. Text Antarc* Antarctic North Atlantic Deep Water North Atlantic Unknown Antarctic Deacon ENVELOPE(-59.987,-59.987,-73.248,-73.248) The Antarctic |
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ftciteseerx |
language |
English |
description |
The adiabatic pole-to-pole cell of the residual overturning circulation (ROC) is studied in a twohemisphere, semienclosed basin, with a zonally reentrant channel occupying the southernmost eighth of the domain. Three different models of increasing complexity are used: a simple, analytically tractable zonally averaged model; a coarse-resolution numerical model with parameterized eddies; and an eddyresolving general circulation model. Two elements are found to be necessary for the existence of an adiabatic pole-to-pole cell: 1) a thermally indirect, wind-driven overturning circulation in the zonally reentrant channel, analogous to the Deacon cell in the Antarctic Circumpolar Current (ACC) region, and 2) a set of outcropping isopycnals shared between the channel and the semienclosed region of the Northern Hemisphere. These points are supported by several computations varying the domain geometry, the surface buoyancy distribution, and the wind forcing. All three models give results that are qualitatively very similar, indicating that the two requirements above are general and robust. The zonally averaged model parameterizes the streamfunction associated with adiabatic buoyancy fluxes as downgradient diffusion of buoyancy thickness, with a diffusivity in the semienclosed region of the Northern Hemisphere much larger than that in the ACC region. In the simple model, the disparity in diffusivities is necessary to obtain a substantial pole-to-pole ROC. The simple model also illustrates how the geometry of the isopycnals is shaped by the interhemispheric ROC, leading to three major thermostads, which the authors identify with the major water masses of the Atlantic: that is, North Atlantic Deep Water, Antarctic Intermediate Water, and Antarctic Bottom Water. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Christopher L. Wolfe Paola Cessi |
spellingShingle |
Christopher L. Wolfe Paola Cessi The Adiabatic Pole-to-Pole Overturning Circulation |
author_facet |
Christopher L. Wolfe Paola Cessi |
author_sort |
Christopher L. Wolfe |
title |
The Adiabatic Pole-to-Pole Overturning Circulation |
title_short |
The Adiabatic Pole-to-Pole Overturning Circulation |
title_full |
The Adiabatic Pole-to-Pole Overturning Circulation |
title_fullStr |
The Adiabatic Pole-to-Pole Overturning Circulation |
title_full_unstemmed |
The Adiabatic Pole-to-Pole Overturning Circulation |
title_sort |
adiabatic pole-to-pole overturning circulation |
publishDate |
2010 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.220.7484 http://www-pord.ucsd.edu/%7Epcessi/wolfe_cessi_11.pdf |
long_lat |
ENVELOPE(-59.987,-59.987,-73.248,-73.248) |
geographic |
Antarctic Deacon The Antarctic |
geographic_facet |
Antarctic Deacon The Antarctic |
genre |
Antarc* Antarctic North Atlantic Deep Water North Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic Deep Water North Atlantic |
op_source |
http://www-pord.ucsd.edu/%7Epcessi/wolfe_cessi_11.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.220.7484 http://www-pord.ucsd.edu/%7Epcessi/wolfe_cessi_11.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766059815518339072 |