Re: Root Mean Square Analysis for daily MM5 MSLP field

From: Erik Noble <enoble_at_nyahnyahspammersnyahnyah>
Date: Thu, 27 Mar 2008 16:20:25 -0400

These two functions helped me get an RMS for WRF 3-hr data:
http://www.ncl.ucar.edu/Document/Functions/Built-in/dim_rmsd.shtml
http://www.ncl.ucar.edu/Document/Functions/Contributed/dim_rmsd_Wrap.shtml

and the response from an earlier post helped me use it:
If you want an unweighted spatial rmsd at each time step
and nlat and mlon are the size of the lat and lon dimensions,
and you want to keep it in the loop

dum1 = onedtond( ndtooned(FNLv925(nt,:,:)), (/1, nlat*mlon/))
dum2 = onedtond( ndtooned(v925(nt,:,:)) , (/1, nlat*mlon/))

rmsdTime925(nt) = dim_rmsd_Wrap(dum1,dum2)

http://www.ncl.ucar.edu/Support/talk_archives/2008/0207.html

-Erik

On Thu, Mar 27, 2008 at 3:49 PM, Justin Glisan <glisanj_at_iastate.edu> wrote:
> Hello everyone,
>
> I'm very new to NCL and was wondering if anyone could offer any help to me? Here's what I have
>
> 1) Daily MM5 MSLP output over 3-hr timesteps
> 2) An NCL code I've written that plots this data polar stereographically and tweaked to my research
> needs
>
> What I want to do is run a RMS analysis on the daily MSLP data to get an output plot of monthly RMS
> MSLP values. So, in essence a monthly RMS MSLP climatology.
>
> Thank you for your time and consideration.
>
> J
>
> ___________________________
> Justin Glisan
> Doctoral Research Assistant
> Geological and Atmospheric Sciences
> Iowa State University
>
>
>
>
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> ncl-talk_at_ucar.edu
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>
>
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Received on Thu Mar 27 2008 - 14:20:25 MDT

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