| 1 | \newpage |
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| 2 | \appendix |
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| 3 | \chapter{The grid types for the transformations} |
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| 4 | \label{subsec_gridtypes} |
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| 5 | |
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| 6 | As described in section \ref{sec_transformations} for the different |
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| 7 | SCRIP remappings, OASIS3-MCT support different types of grids. The |
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| 8 | characteristics of these grids are detailed here: |
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| 9 | |
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| 10 | \begin{itemize} |
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| 11 | |
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| 12 | \item {\tt `LR' grid}: The longitudes and the latitudes of |
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| 13 | 2D Logically-Rectangular (LR) grid points can be described by two arrays |
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| 14 | {\tt longitude(i,j)} and {\tt latitude(i,j)}, where i and j |
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| 15 | are respectively the first and second index dimensions. Streched |
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| 16 | or/and rotated grids are LR grids. Note that previous OASIS3 A, B, G, L, Y, or Z |
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| 17 | grids are all particular cases of LR grids. |
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| 18 | |
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| 19 | \item {\tt `U' grid}: Unstructured (U) grids do have any particular |
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| 20 | structure. The longitudes and the latitudes of 2D Unstructured |
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| 21 | grid points must be described by two arrays {\tt |
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| 22 | longitude(nbr\_pts,1)} and {\tt latitude(nbr\_pts,1)}, where nbr\_pts |
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| 23 | is the total grid size. |
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| 24 | |
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| 25 | \item {\tt `D' grid} The Reduced (D) grid is composed of a certain |
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| 26 | number of latitude circles, each one being divided into a varying |
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| 27 | number of longitudinal segments. In OASIS3-MCT, the grid data (longitudes, |
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| 28 | latitudes, etc.) must be described by arrays dimensioned {\tt |
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| 29 | (nbr\_pts,1)}, where {\tt nbr\_pts} is the total number of grid |
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| 30 | points. There is no overlap of the grid, and no grid point at the |
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| 31 | equator nor at the poles. There are grid points on the Greenwich |
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| 32 | meridian. |
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| 33 | |
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| 34 | \end{itemize} |
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| 35 | |
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| 36 | |
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| 37 | |
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