GRIB2 - TABLE 3.15

PHYSICAL MEANING OF
VERTICAL COORDINATE

In Section 3, Octet 63
(For grid templates 100)

Revised 04/04/2013


Code Figure Meaning Unit
0-19
 Reserved
20
 Temperature
 K
21-99
 Reserved
100
 Pressure
 Pa
101
 Pressure deviation from mean sea level
 Pa
102
 Altitude above mean sea level
 m
103
 Height above ground (see note 1)
 m
104
 Sigma coordinate
105
 Hybrid coordinate
106
 Depth below land surface
 m
107
 Potential temperature (theta)
 K
108
 Pressure deviation from ground to level
 Pa
109
 Potential vorticity
 K m-2 kg-1 s-1
110
 Geometric height
 m
111
 Eta coordinate (see note 2)
112
 Geopotential height
 gpm
113
 Logarithmic hybrid coordinate
114-159 Reserved
160
 Depth below sea level
 m
161-191
 Reserved
192-254
 Reserved for Local Use
255
 Missing


Notes:

1.  Negative values associate to this coordinate will indicate depth below ground surface.  If values are all below the surface, use of entry 106 is recommended with positive coordinate values instead.

2.  The Eta vertical coordinate system involves normalizing the pressure at some point on a specific level by the mean sea level pressure at that point.

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