[ncl-talk] Question about regrid 1) different commands get different results; 2)input emission amount or emission intensity

[Dennis Shea]

I have nor run your script.

I am not sure what you mean "results are different." The three methods are
different.

(a) linint2 takes the 4 nearest source grid locations and does a bilinear
interpolation.
(b) does some form of 'global' area conservation
(c) does a local area average

Hence, I am not surprised that they return different results.

===
Attached is a script that uses ESMF regridding via bilinear, patch and
conserve methods.

 If you run the script you will also get a nc fil with the interpolated
grids

Good Luck

On Fri, Mar 3, 2017 at 2:18 PM, Ziyuan Wang <1301111586 at pku.edu.cn> wrote:

> Hi ncl-talk members
>
> Now I have an emission amount inventory (lat 33:73, lon -12:45), with
> resolution 0.1*0.1, the emission variable E_HFC_1234 is the emission amount
> of each grid with unit Mg, as 'HFC.nc' show. I want to interpolate to lower
> resolution 1*1.
>
> 1. I tried 3 different commands: "linint2", "*area_conserve_remap_Wrap
> <http://www.ncl.ucar.edu/Document/Functions/Contributed/area_conserve_remap_Wrap.shtml>",
> and "*area_hi2lores_Wrap" But three return results are different (try in
> regrid.ncl)
>
> 2) The input "fi" of each command should be the emission amout? or the
> emission intensity of each grid? Do I need to calculate E_HFC_1234 into
> emission intensity, by dividing the area of each grid? If so, which command
> can I use to calculate area?
>
> Thanks
>
> Best
>
> Ziyuan
>
>
>
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