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revision 1.15 by mlosch, Mon Jun 2 13:25:40 2008 UTC revision 1.16 by dimitri, Wed Jun 4 00:39:25 2008 UTC
# Line 6  ice simulations that exercise various ca Line 6  ice simulations that exercise various ca
6  model.  The first set of results is from a global, eddy-permitting, ocean and  model.  The first set of results is from a global, eddy-permitting, ocean and
7  sea ice configuration.  The second set of results is from a regional Arctic  sea ice configuration.  The second set of results is from a regional Arctic
8  configuration, which is used to compare the B-grid and C-grid dynamic solvers  configuration, which is used to compare the B-grid and C-grid dynamic solvers
9  and various other capabilities of the MITgcm sea ice model.    and various other capabilities of the MITgcm sea ice model.
 %  
 \ml{[do we really want to do this?:] The third set of  
 results is from a yet smaller regional domain, which is used to illustrate  
 treatment of sea ice open boundary condition in the MITgcm.}  
10    
11  \subsection{Global Ocean and Sea Ice Simulation}  \subsection{Global Ocean and Sea Ice Simulation}
12  \label{sec:global}  \label{sec:global}
# Line 28  relatively even grid spacing throughout Line 24  relatively even grid spacing throughout
24  singularities \citep{adcroft04:_cubed_sphere}. Each face of the cube comprises  singularities \citep{adcroft04:_cubed_sphere}. Each face of the cube comprises
25  510 by 510 grid cells for a mean horizontal grid spacing of 18 km. There are  510 by 510 grid cells for a mean horizontal grid spacing of 18 km. There are
26  50 vertical levels ranging in thickness from 10 m near the surface to  50 vertical levels ranging in thickness from 10 m near the surface to
27  approximately 450 m at a maximum model depth of 6150 m. Bathymetry is from the  approximately 450 m at a maximum model depth of 6150 m. The model employs the
28  National Geophysical Data Center (NGDC) 2-minute gridded global relief data  partial-cell formulation of
 (ETOPO2) and the model employs the partial-cell formulation of  
29  \citet{adcroft97:_shaved_cells}, which permits accurate representation of the  \citet{adcroft97:_shaved_cells}, which permits accurate representation of the
30  bathymetry. The model is integrated in a volume-conserving configuration using  bathymetry. Bathymetry is from the S2004 (Smith, unpublished) blend of the
31    \citet{smi97} and the General Bathymetric Charts of the Oceans (GEBCO) one
32    arc-minute bathymetric grid (see Fig.~\ref{fig:CubeBathymetry}).
33    The model is integrated in a volume-conserving configuration using
34  a finite volume discretization with C-grid staggering of the prognostic  a finite volume discretization with C-grid staggering of the prognostic
35  variables. In the ocean, the non-linear equation of state of \citet{jac95} is  variables. In the ocean, the non-linear equation of state of \citet{jac95} is
36  used.  used.
37    
38    \begin{figure}[h]
39      \centering
40      \includegraphics[width=\textwidth]{\fpath/CubeBathymetry}
41      \caption{Bathymetry of the global cubed sphere model configuration.  The
42        solid lines indicate domain boundaries for the regional Arctic
43        configuration discussed in Section~\ref{sec:arctic}.}
44      \label{fig:CubeBathymetry}
45    \end{figure}
46    
47  The ocean model is coupled to the sea-ice model discussed in  The ocean model is coupled to the sea-ice model discussed in
48  \refsec{model} using the following specific options.  The  \refsec{model} using the following specific options.  The
49  zero-heat-capacity thermodynamics formulation of \citet{hibler80} is  zero-heat-capacity thermodynamics formulation of \citet{hibler80} is
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