Re: Taylor Diagram

Hello,

The ncl-talk forum is for questions about the NCL language.
Your question contains 'new to NCL',
'guidance over input approach', 'script would be recommended
amongst the various types', 'guidance on output' and
'Please advise on how I can proceed'. It is unlikely
anyone has the time to walk you thru every step. Based on
past situations ncl-talk would end up writing the
necessary scripts. There is not enough time for this
level of support.

[1] Familiarize yourself with NCL. Read the mini-language manual at:
         http://www.ncl.ucar.edu/Document/Manuals/
     A tutorial:
         http://www.ncl.ucar.edu/Document/Manuals/Getting_Started/

[2] After reading [1], write some simple scripts of your own
     to do simple tasks. Specifically read a netCDF file from
     one of the your datasets and plot contours over a map
     and a time series.

[3] Read Karl Taylor's article
         "Summarizing multiple aspects of model performance
          in a single diagram"
     at:
          http://dx.doi.org/10.1029/2000JD900719

[4] The Taylor Diagram requires a 'pattern correlation' for this
     you must regrid one data set to the grid of your reference grid.
     Hence, after you are familiar with NCL:
        (a) read 2 data sets with different resoultions and regrid
        (b) calculate a pattern correlation
     See:
http://www.ncl.ucar.edu/Document/Functions/Contributed/pattern_cor.shtml
http://www.ncl.ucar.edu/Applications/regrid.shtml
      If regCM is rectilinear then the linint2_Wrap function may be
      all you need. More complicated regridding may require using
http://www.ncl.ucar.edu/Applications/ESMF.shtml

[5] The Taylor Diagram requires a ration of variances. These must be
     areally weighted variances.

Respond *only* to ncl-talk@ucar.edu and please do not
address me directly.

Good luck

On 2/23/14, 10:05 PM, Marshall L. Mdoka wrote:
> Hi All,
>
> I am new to NCL and would like to use it to plot Taylor diagrams. I have
> successfully installed NCL and looked at some examples. However, I am still
> not confident enough to plot anything yet.
>
> I would like to plot Taylor diagrams using regCM run, CRU, GPCP, GPCC, UDEL
> for precipitation and CRU, UDEL etc. for temperature. I would like some
> guidance over input approach of the data in the script and which script
> would be recommended amongst the various types available. I would also like
> some guidance on output. I prefer png format and would like diagrams with
> all the basic information. Please advise on how I can proceed.
>
> Thank you,
>
>
>
>
>
>
>
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Received on Mon Feb 24 10:43:10 2014