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For any spectral element grid with N elements, the number of unique points (physics columns) is (np-1)^2 * N + 2. , where each element contains a np x np tensor product of Gauss-Lobatto points.
| NE | name | Resolution degrees | Resolution at equator (km) | Resolution at equator (miles) | N elements | N columns | factor over ne30 N columns | grid file size | map file size |
|---|---|---|---|---|---|---|---|---|---|
| 4 | ultra low | 7.5 | 835 | 520 | 96 | 866 | |||
| 11 | 2.7 | 304 | 190 | 726 | 6536 | ||||
| 16 | 1.9 | 210 | 130 | 1536 | 13826 | ||||
| 30 | low | 1.0 | 110 | 70 | 5400 | 48602 | 1x | ||
| 120 | high | 0.25 | 28 | 17.25 | 86400 | 777602 | 16x | ||
| 240 | 0.125 | 14 | 8.65 | 345600 | 3110402 (3.1M) | 64x | |||
| 256 | 0.1171875 | 13 | 8.1 | 393216 | 3538946 (3.5M) | 73x | |||
| 512 | 0.05859 | 6.5 | 4 | 1572864 (1.57M) | 14155778 (14.16M) | 291x | |||
| 1024 | ultra high | 0.029297 | 3.25 | 2 | 6291456 (6.29M) | 56623106 (56.6M) | 1165x | ||
| 2048 | 0.014648 | 1.63 | 1 | 25165824 (25.2M) | 226492418 (226.5M) | 4660x | |||
| 3600 | 0.0083333 | 0.925 | 0.58 | 77760000 (77.76M) | 699840002 (688.85M) | 14400x | |||
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**Standard vertical resolution for E3SM is 72 vertical levels.
For cubed sphere grids with np=4:
| Code Block |
|---|
Resolution degrees = 360/4/NE/3 Resolution km = 40075/4/NE/3 Resolution miles = 24901/4/NE/3 Number elements = NE*NE*6 Number columns = 54*NE*NE + 2 |
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