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Pole relocation for an orthogonal grid: An analytic method

journal contribution
posted on 2023-05-16, 18:49 authored by Jason RobertsJason Roberts, Heil, P, Murray, RJ, Damien HollowayDamien Holloway, Nathaniel BindoffNathaniel Bindoff
Oceanic general circulation models, especially for climate applications, lack computational efficiency and accuracy when solved on horizontal grids that contain a singularity, i.e. a grid pole, within the ocean mask of the computational domain. Here we present a fully analytical approach of generating a curvilinear, globally orthogonal grid, where the grid poles are located outside the ocean's computational domain, and the grid parallels in the vicinity of the geographic Equator are parallel to the latter. The grid is dipolar, asymmetric and composite with a smooth transition. In this grid all ocean basins are connected and straits are open in the same manner as on the geographical grid. The grid generation is based on grid parallels which are circles and the analytical determination of grid meridians which are orthogonal to them. Grid-cell anisotropy and grid resolution are determined from analytical functions, and may be varied to suit scientific goals. © 2005 Elsevier Ltd. All rights reserved.

Funding

Australian Research Council

History

Publication title

Ocean Modelling

Volume

12

Issue

1-2

Pagination

16-31

ISSN

1463-5003

Department/School

School of Natural Sciences

Publisher

Elsevier Sci Ltd

Place of publication

Kidlington, Oxford, UK

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the mathematical sciences

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