The Vertical Advection of Momentum in Bryan-Cox-Semtner Ocean General Circulation ModelsSource: Journal of Physical Oceanography:;1995:;Volume( 025 ):;issue: 012::page 3186Author:Webb, David J.
DOI: 10.1175/1520-0485(1995)025<3186:TVAOMI>2.0.CO;2Publisher: American Meteorological Society
Abstract: This paper is concerned with the way that the Bryan-Cox-Semtner type ocean general circulation models represent the vertical advection of momentum, particularly at horizontal scales which are only slightly larger than the model grid. In practice such scales are important because limits in available computer power mean that it is often necessary to run models that only just resolve key oceanic features such as the Gulf Stream. It is shown that the approximations involved in deriving the finite-difference momentum equation lead to an error in the estimated vertical flux of momentum. It Is found that the error is largest in features that are only just resolved by the model grid and that the magnitude of the largest error increases as the grid size is reduced. As a result, in ocean models that are just eddy resolving, the error can have a significant effect on the overall balance of momentum. An improved finite-difference scheme is presented that greatly reduces the error.
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contributor author | Webb, David J. | |
date accessioned | 2017-06-09T14:51:53Z | |
date available | 2017-06-09T14:51:53Z | |
date copyright | 1995/12/01 | |
date issued | 1995 | |
identifier issn | 0022-3670 | |
identifier other | ams-28453.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4165571 | |
description abstract | This paper is concerned with the way that the Bryan-Cox-Semtner type ocean general circulation models represent the vertical advection of momentum, particularly at horizontal scales which are only slightly larger than the model grid. In practice such scales are important because limits in available computer power mean that it is often necessary to run models that only just resolve key oceanic features such as the Gulf Stream. It is shown that the approximations involved in deriving the finite-difference momentum equation lead to an error in the estimated vertical flux of momentum. It Is found that the error is largest in features that are only just resolved by the model grid and that the magnitude of the largest error increases as the grid size is reduced. As a result, in ocean models that are just eddy resolving, the error can have a significant effect on the overall balance of momentum. An improved finite-difference scheme is presented that greatly reduces the error. | |
publisher | American Meteorological Society | |
title | The Vertical Advection of Momentum in Bryan-Cox-Semtner Ocean General Circulation Models | |
type | Journal Paper | |
journal volume | 25 | |
journal issue | 12 | |
journal title | Journal of Physical Oceanography | |
identifier doi | 10.1175/1520-0485(1995)025<3186:TVAOMI>2.0.CO;2 | |
journal fristpage | 3186 | |
journal lastpage | 3195 | |
tree | Journal of Physical Oceanography:;1995:;Volume( 025 ):;issue: 012 | |
contenttype | Fulltext |