Re: wrf_rh

Moti:
This is what the NCL website has as the description, but I suspect
you've seen it.
http://www.ncl.ucar.edu/Document/Functions/Built-in/wrf_rh.shtml

Description

This function returns relative humidity with respect to liquid water
[%], which is estimated by the ratio of the actual to the saturation
vapor pressure. This function also makes sure there are no negative
values in qv by setting them all to 0.

I am pretty sure it's the standard way of RH calculation - similar to this one:
http://www.ncl.ucar.edu/Document/Functions/Built-in/relhum.shtml

Good luck,
Masha

On Thu, Apr 19, 2012 at 11:12 PM, <ncl-talk-owner@ucar.edu> wrote:
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> ---------- Forwarded message ----------
> From: Masha Tsukernik <mariatsuk@gmail.com>
> To: "Mittal, Moti" <mmittal@health.usf.edu>
> Cc: "ncl-talk@ucar.edu" <ncl-talk@ucar.edu>
> Date: Thu, 19 Apr 2012 23:12:41 -0400
> Subject: Re: [ncl-talk] wrf_rh
> Moti:
> You can look for the source code in the WRF library
>
> $NCARG_ROOT/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl
>
> Hope that helps,
> Masha
>
> On Thu, Apr 19, 2012 at 11:03 PM, Mittal, Moti <mmittal@health.usf.edu> wrote:
>> Hallo,
>>
>>
>> I need help to calculate relative humidity from WRFoutput.
>>
>> I checked the scripts and found a built in function wrf_rh.
>>
>> I want to learn the formula from which you build this function.
>> Is it possible to know the formula for relative humidity from water vapour
>> mixing ratio, pressure, and temperature?
>>
>> Moti
>>
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Received on Fri Apr 20 07:00:39 2012