Bottom topography
code | source | modifications | min depth | max depth |
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AWI | IBCAO | deepened some channels | 30 m | 4800 m |
GSFC | TerrainBase Global DTM | extensive smoothing | 50 m | 6000 m |
DRAKKAR | ETOPO2 (IBCAO in the Arctic) | Some (not in the Arctic) | 10m | 5750m |
ICMMG | IBCAO | deepened some channels | 50 m | 5500 m |
LANL | IBCAO + Smith&Sandwell | pointwise changes | 20 m | 5500 m |
LU | IBCAO + ETOPO5 | widened some straits | 30 m | 4345 m |
NERSC | GEBCO | modified some sill depths | 50m | 7505m |
NPS | IBCAO + ETOPO5 | widened some straits | 45 m | 4300 m |
NYU | IBCAO + ETOPO5 | none | 20 m | 5000 m |
POL | IBCAO + ETOPO5 | some | 15m | 5500m |
FEMAO1 | Polyakov | smoothing, widened some straits | 25 m | 4000 m |
FEMAO2 | IBCAO | smoothing, widened some straits | 25 m | 5000 m |
INMOM | ETOPO5 | smoothing | 10 m | 7457 m |
N Atlantic only | radiation (Stevens, 1990) | none |
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UCL | ETOPO5 | pointwise | 20 m | 5500 m |
UW | IBCAO + ETOPO5 | ? | 75 m | ? |
DAL |
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FSU |
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GFDL |
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IARC-A | IBCAO | smoothing | 10m | 4000m* |
IARC-B | IBCAO | none | 10m | 4000m* |
ECCO2 | GEBCO + Smith&Sandwell | none | 0m | 6145m |
MIT |
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NCAR |
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NPI |
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UMASD |
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NOCS/ORCA25 | ETOPO2+IBCAO+GEBCO 1mn. | smoothing | 25 m | 5902 m |
MCGU |
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LOCEAN | ETOPO5 + Smith & Sandwel | modified channels | 20m | 5500m |
IOS | IBCAO + ETOPO5 | widened Nares Strait | 30 m | 4345 m |
Note: all z-level models use full-cell depth representation.
*IARC model adopts partial steps for vertical grid cell.