Level type values

They values closely correspond to how a level is specified in the GRIB file format.

Level type  Description                            L1 value                    L2 value

0           Reserved

1           Ground or water surface

2           Cloud base level

3           Level of cloud tops

4           Level of 0$^o$C isotherm

5           Level of adiabatic condensation lifted
            from the surface

6           Maximum wind level

7           Tropopause

8           Nominal top of atmosphere

9           Sea bottom

10-19       Reserved

20          Isothermal level                       Temperature in 1/100 K

21-99       Reserved

100         Isobaric surface                       Pressure in hPa

101         Layer between two isobaric surfaces    Pressure of top in kPa      Pressure of bottom in kPa

102         Mean sea level

103         Specified altitude above mean sea      Altitude in meters
            level

104         Layer between two specified altitudes  Altitude of top in hm       Altitude of bottom in hm
            above mean sea level

105         Specified height above ground          Height in meters

106         Layer between two specified height     Height of top in hm         Height of bottom in hm
            levels above ground

107         Sigma level                            Sigma value in 1/10000

108         Layer between two sigma levels         Sigma value of top in 1/100 Sigma value of bottom in
                                                                               1/100

109         Hybrid level                           Level number

110         Layer between two hybrid levels        Level number of top         Level number of bottom

111         Depth below land surface               Depth in centimeters

112         Layer between two depths below land    Depth of upper surface in   Depth of lower surface in
            surface                                cm                          cm



Level type  Description                            L1 value                    L2 value

113         Isentropic (theta) level               Potential temperature in K

114         Layer between two isentropic levels    475 K minus theta of top in 475 K minus theta of bottom
                                                   K                           in K

115         Level at specified pressure difference Pressure difference in hPa
            from ground to level

116         Layer between two levels at specified  Pressure difference from    Pressure difference from
            pressure differences from ground to    ground to top level in hPa  ground to bottom level in
            level                                                              hPa

117         Potential vorticity surface            10-9 K m2 kg-1 s-1

118         Reserved

119         ETA* level                             ETA value in 1/10000

120         Layer between two ETA* levels          ETA value at top of layer   ETA value at bottom of
                                                   in 1/100                    layer in 1/100

121         Layer between two isobaric surfaces    1100 hPa minus pressure of  1100 hPa minus pressure of
            (high precision)                       top in hPa                  bottom in hPa

122-124     Reserved

125         Specified height level above ground    Height in centimeters
            (high precision)

126-127     Reserved

128         Layer between two sigma levels (high   1.1 minus sigma of top in   1.1 minus sigma of bottom
            precision)                             1/1000 of sigma             in 1/1000 of sigma

129-140     Reserved

141         Layer between two isobaric surfaces    Pressure of top in kPa      1100 hPa minus pressure of
            (mixed precision)                                                  bottom in hPa

142-159     Reserved

160         Depth below sea level                  Depth in meters

161-199     Reserved

200         Entire atmosphere (considered as a
            single layer)

201         Entire ocean (considered as a single
            layer)

202-254     Reserved

256         Cloud levels                           0                           0=General Cloud Group,
                                                                               1=CL, 2=CM, 3=CH

256         Synop cloud group 1                    1



Level type  Description                            L1 value                    L2 value

256         Synop cloud group 2                    2

256         Synop cloud group 3                    3

256         Synop cloud group 4                    4

257         Extra anagraphical informations


Generated on Fri Jun 22 15:34:00 2007 for libdballe-msg by  doxygen 1.5.2