20 20 Temperature K
100 100 Pressure Pa
101 101 Pressure deviation from mean sea level Pa
102 102 Altitude above mean sea level m
103 103 Height above ground m
104 104 Sigma coordinate
105 105 Hybrid coordinate
106 106 Depth below land surface m
107 pt Potential temperature (theta) K
108 108 Pressure deviation from ground to level Pa
109 pv Potential vorticity K m-2 kg-1 s-1
110 110 Geometrical height m
111 111 Eta coordinate
112 112 Geopotential height gpm
160 160 Depth below sea level m
255 255 Missing
