| 366 |
|
|
| 367 |
The above grid (Fig.~\ref{fig:vgrid}a) is known as the cell centered |
The above grid (Fig.~\ref{fig:vgrid}a) is known as the cell centered |
| 368 |
approach because the tracer points are at cell centers; the cell |
approach because the tracer points are at cell centers; the cell |
| 369 |
centers are mid-way between the cell interfaces. An alternative, the |
centers are mid-way between the cell interfaces. |
| 370 |
vertex or interface centered approach, is shown in |
This discretisation is selected when the thickness of the |
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|
levels are provided ({\bf delR}, parameter file {\em data}, |
| 372 |
|
namelist {\em PARM04}) |
| 373 |
|
An alternative, the vertex or interface centered approach, is shown in |
| 374 |
Fig.~\ref{fig:vgrid}b. Here, the interior interfaces are positioned |
Fig.~\ref{fig:vgrid}b. Here, the interior interfaces are positioned |
| 375 |
mid-way between the tracer nodes (no longer cell centers). This |
mid-way between the tracer nodes (no longer cell centers). This |
| 376 |
approach is formally more accurate for evaluation of hydrostatic |
approach is formally more accurate for evaluation of hydrostatic |
| 377 |
pressure and vertical advection but historically the cell centered |
pressure and vertical advection but historically the cell centered |
| 378 |
approach has been used. An alternative form of subroutine {\em |
approach has been used. An alternative form of subroutine {\em |
| 379 |
INI\_VERTICAL\_GRID} is used to select the interface centered approach |
INI\_VERTICAL\_GRID} is used to select the interface centered approach |
| 380 |
but no run time option is currently available. |
This form requires to specify $Nr+1$ vertical distances {\bf delRc} |
| 381 |
|
(parameter file {\em data}, namelist {\em PARM04}, e.g. |
| 382 |
|
{\em verification/ideal\_2D\_oce/input/data}) |
| 383 |
|
corresponding to surface to center, $Nr-1$ center to center, and center to |
| 384 |
|
bottom distances. |
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%but no run time option is currently available. |
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|
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\fbox{ \begin{minipage}{4.75in} |
\fbox{ \begin{minipage}{4.75in} |
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{\em S/R INI\_VERTICAL\_GRID} ({\em |
{\em S/R INI\_VERTICAL\_GRID} ({\em |
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|
| 401 |
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|
| 402 |
\subsection{Topography: partially filled cells} |
\subsection{Topography: partially filled cells} |
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|
\begin{rawhtml} |
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<!-- CMIREDIR:topo_partial_cells: --> |
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\end{rawhtml} |
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|
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\begin{figure} |
\begin{figure} |
| 408 |
\begin{center} |
\begin{center} |
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