Ice Water Content from GFS file I am working my way through this paper: http://downloads.hindawi.com/journals/amete/2017/8707234.pdf

Equations 10 and 11 require the ice water content.  I can't find it in the GFS grib2 file variables.  Did I miss it, or is possible to derive it from the available information.  Right now I have pressure, temperature, and relative humidity.
There is a parameter ice water mixing ratio in the gfs.t&lt;hour&gt;z.pgrb2.0p25.f&lt;step&gt; file given at isobaric levels.