Interpret cloud properties as level properties (this was the default behaviour before version 1.4; see also
wc_file). If wc_level is defined, a wc_file would be interpreted as follows:
# z LWC R\_eff
# (km) (g/m$$^3$$) (um)
5.000 0 0
4.000 0.2 12.0
3.000 0.1 10.0
2.000 0.1 8.0
The value 0.2 g/m
refers to altitude 4.0km, as e.g. in
a radiosonde profile. The properties of each layer are calculated as
average over the adjacent levels. E.g. the single scattering
properties for the model layer between 3 and 4km are obtained by
averaging over the two levels 3km and 4km. To allow easy definition of
sharp cloud boundaries, clouds are only formed if both liquid water
contents above and below the respective layer are larger than
0. Hence, in the above example, the layers between 2 and 3 as well as
between 3 and 4km are cloudy while those between 1 and 2km and between
4 and 5km are not.
Arve Kylling
2010-03-10