Location of file defining ice cloud properties.
ic_file file
The file must contain three columns. Column 1 is the altitude in km,
column 2 the ice water content in grams per cubic meter, and column 3
the effective particle radius in micrometer. Empty lines are
ignored. Comments start with #. Note that the definition of
cloud altitudes in ic_file refers to sea level, not to altitude
above ground. E.g., when altitude is set to 1.63km, and the
first cloud level is defined at 3km, the cloud would start at 1.37km
above ground. An example of an ice cloud is given in
examples/IC.DAT.
Per default the cloud properties are interpreted as layer properties. Before version 1.4 the default was level properties: The optical depth of a layer was calculated using information from the upper and lower levels defining the layer, see ic_layer and ic_level. To switch to the old behaviour, use ic_level. See section about ice clouds for a realistic example how the contents of the ic_file are converted to optical properties.