<p>There is a parameter <code>ice water mixing ratio</code> in the <code>gfs.t&lt;hour&gt;z.pgrb2.0p25.f&lt;step&gt;</code> file given at isobaric levels. </p>

CC BY-SA 4.0
2020-03-30T11:32:36.430Z
To get the IWC, I would multiple by the density of dry air?
Craeft
CC BY-SA 4.0
2020-03-29T21:19:00.167Z
2020-03-29T21:19:00.167Z
kakk11
<p>I am working my way through this paper: <a href="http://downloads.hindawi.com/journals/amete/2017/8707234.pdf" rel="nofollow noreferrer">http://downloads.hindawi.com/journals/amete/2017/8707234.pdf</a></p>

<p>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.</p>

<meteorology><clouds><weather-forecasting><gfs><cloud-microphysics>
Ice Water Content from GFS file
Craeft
# Ice Water Content from GFS file

(Asked by: username_0 on 2020-03-26)

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.

**Tags:** meteorology, clouds, weather-forecasting, gfs, cloud-microphysics


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## 1 answers

### Answer by username_1 on 2020-03-29. Score: 1

There is a parameter `ice water mixing ratio` in the `gfs.t<hour>z.pgrb2.0p25.f<step>` file given at isobaric levels.

> **Comments:**
> **username_0**: To get the IWC, I would multiple by the density of dry air?  

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