GrADS and precip units

Dan Leins theedge981 at GMAIL.COM
Tue Oct 25 11:53:17 EDT 2005


Ok, thanks everyone, that definitely makes a difference!
 Dan

 On 10/25/05, Sestak, Dr. Michael <michael.sestak at fnmoc.navy.mil> wrote:
>
> 1 kg/m2 * 1000 g/kg / 1 g /cm3 (density of water) * 1 m2/10000 cm2 = 0.1cm = 1 mm
>  approximately, since the density of water depends on temperature, but
> close enough given all the other sources of error in any model.
>  Michael Sestak
> Fleet Numerical Meteorology and Oceanography Center
> Monterey, CA
>
> -----Original Message-----
> *From:* Dan Leins [mailto:theedge981 at GMAIL.COM]
> *Sent:* Tuesday, October 25, 2005 8:33 AM
> *To:* GRADSUSR at LIST.CINECA.IT
> *Subject:* GrADS and precip units
>
>  List,
>  I dumped the contents of an eta 48hr grib file using grib2ctl to a
> control file so I could use GrADS to plot surface pressure and precip.
> However I couldn't help but notice that the units for Surface Convective
> Precip were in kg/m^2. Pardon my ignorance, as I've never actually plotted
> precip contours before, but how does this convert into inches or even
> centimetes? The values produced seemed suspiciously high, similar to
> something you might see in a convective feedback situation, and I was
> wondering if there is some sort of conversion factor I'm not aware of, or if
> I should literally expect 4" liquid equivalent in a 3 hr period?
>  Thanks,
> Dan
>
>
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