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contributor authorGirard, Claude
contributor authorPlante, André
contributor authorDesgagné, Michel
contributor authorMcTaggart-Cowan, Ron
contributor authorCôté, Jean
contributor authorCharron, Martin
contributor authorGravel, Sylvie
contributor authorLee, Vivian
contributor authorPatoine, Alain
contributor authorQaddouri, Abdessamad
contributor authorRoch, Michel
contributor authorSpacek, Lubos
contributor authorTanguay, Monique
contributor authorVaillancourt, Paul A.
contributor authorZadra, Ayrton
date accessioned2017-06-09T17:31:30Z
date available2017-06-09T17:31:30Z
date copyright2014/03/01
date issued2013
identifier issn0027-0644
identifier otherams-86708.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4230296
description abstracthe Global Environmental Multiscale (GEM) model is the Canadian atmospheric model used for meteorological forecasting at all scales. A limited-area version now also exists. It is a gridpoint model with an implicit semi-Lagrangian iterative space?time integration scheme. In the ?horizontal,? the equations are written in spherical coordinates with the traditional shallow atmosphere approximations and are discretized on an Arakawa C grid. In the ?vertical,? the equations were originally defined using a hydrostatic-pressure coordinate and discretized on a regular (unstaggered) grid, a configuration found to be particularly susceptible to noise. Among the possible alternatives, the Charney?Phillips grid, with its unique characteristics, and, as the vertical coordinate, log-hydrostatic pressure are adopted. In this paper, an attempt is made to justify these two choices on theoretical grounds. The resulting equations and their vertical discretization are described and the solution method of what is forming the new dynamical core of GEM is presented, focusing on these two aspects.
publisherAmerican Meteorological Society
titleStaggered Vertical Discretization of the Canadian Environmental Multiscale (GEM) Model Using a Coordinate of the Log-Hydrostatic-Pressure Type
typeJournal Paper
journal volume142
journal issue3
journal titleMonthly Weather Review
identifier doi10.1175/MWR-D-13-00255.1
journal fristpage1183
journal lastpage1196
treeMonthly Weather Review:;2013:;volume( 142 ):;issue: 003
contenttypeFulltext


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