Re: Calculating Richardson number

I modified an existing code to make a stand-alone function
that computes the gradient Richardson number:

  Ri = ((9.8/T)*(dTdz))/(dUdz)^2

I applied it to data from a WRF file. The results have not been
verified. Use at your own risk. If problems are found,
please send corrections to ncl-talk@ucar.edu

On 6/26/12 5:22 AM, Suffern Paul wrote:
> Kalim and Christopher,
>
> I have been trying and looking for a NCL code to calculate the
> Richardson number as well as EDR just to get a feel for turbulence, etc…
> in the atmosphere. I’ve been running the WRF, but haven’t been able to
> make/find a successful code yet. No luck so far over here. Any thoughts
> or help would be much appreciated. Have a great day!
>
> Paul
>
> *Paul Suffern*
>
> Senior Meteorologist, National Transportation Safety Board
>
> Email: paul.suffern@ntsb.gov
>
> *From:*ncl-talk-bounces@ucar.edu [mailto:ncl-talk-bounces@ucar.edu] *On
> Behalf Of *kalim ullah
> *Sent:* Tuesday, June 26, 2012 6:01 AM
> *To:* Christopher Steele (ENV)
> *Cc:* ncl-talk@ucar.edu
> *Subject:* Re: [ncl-talk] Calculating Richardson number
>
> Dear Christopher,
>
> You want to calculate local Richardson number let say:
>
> Ri = ((9.8/T)*(dTdz))/(dUdz)^2
>
> where T is potential temperature (K), gravitational accelration =9.8 , z
> is height, and wind speed:
>
> U = (u*u + v*v)^(0.5)
>
> If you need this I will send you acode of line.
>
> good luck!
>
> kalim ullah, Ph.D
>
> Meteorology Department,
>
> CIIT, Islamabad, Pakistan
>
>
>
> --- On *Tue, 6/26/12, Christopher Steele (ENV)
> /<Christopher.Steele@uea.ac.uk>/* wrote:
>
>
> From: Christopher Steele (ENV) <Christopher.Steele@uea.ac.uk>
> Subject: Calculating Richardson number
> To: "NCL Talk" <ncl-talk@ucar.edu>
> Date: Tuesday, June 26, 2012, 1:09 AM
>
> Hello,
>
> Are there any existing functions knocking around which calculate the
> Richardson number from measurements of wind speed, temperature and
> humidity?
>
> regards
>
>
> Christopher Steele,
> School of Environmental Sciences
> University of East Anglia
> Norwich
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