Re: Re: [ncl-talk] ESMF vs.Grads

From: zhulei <zhuhao2008_at_nyahnyahspammersnyahnyah>
Date: Tue Apr 16 2013 - 07:33:17 MDT

Dear Mary,
Thanks very much for your so much help, I really appreciate it.
Yes, I used the cressman method and the parameters setting is 10, 7, 5, 3,1 (oacres(g.1, obs.2, 10, 7, 5, 3, 1)) in grads. It seems similar even I just using the default setting like oacres( g.1, obs.2 ).

Some time ago, I used the obj_anal_ic method, but seems something wrong. Maybe I set some place unsuitable. I do not know if it is convenient to you to test this interpolation method.



发件人:Mary Haley <>
发送时间:2013-04-16 13:38
主题:Re: [ncl-talk] ESMF vs.Grads


I think it's the nature of your data that certain interpolation methods are not going to work. I tried several other interpolation methods (natgrid, dsgrid2, patch, bilinear, triple2grid), and none of them worked well. I also tried a fairly new "nearest neighbor" method with ESMF.

It look like you used cressman on the grads version? If so, can you tell me you used for the various input parameters?

I believe we have something similar in NCL, called obj_anal_ic.


On Apr 12, 2013, at 9:40 PM, zhulei wrote:

Thanks. It may be not the "SrcMask2D" reason. Attached the data, plot and the code.



发件人:Mary Haley
发送时间:2013-04-13 01:20
主题:Re: [ncl-talk] ESMF vs.Grads


It looks like you may need to set a "SrcMask2D".

Try this:

  Opt@SrcMask2D = where(ismissing(pwv),0,1)

If it doesn't work, then can you provide me with your data so I can try it here?


On Apr 10, 2013, at 2:01 AM, zhulei wrote:

> Hello,
> I am using ESMF ( ESMF_regrid_21.ncl ) to proceess the station data. It works very well but just has a small place I want to know if can to change. While in the data sparse region, the ESMF also generate some large shaded range. Thank you in advance.
> Attachment gives the figure and the script.
> <ESMF vs.Grads.pdf><ESMF_regrid.ncl>_______________________________________________
> ncl-talk mailing list
> List instructions, subscriber options, unsubscribe:

<2313_201207231300_3dvarobs.dat><ESMF vs. Grads_1.pdf><ESMF_regrid.ncl>
Received on Tue Apr 16 07:34:45 2013

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