Re: Regridding emissions between two WRF-chem files

If you want to go from curvilinear to curvilinear (eg: WRF-to-WRF),
and do it conservatively, there are currently no NCL builtin functions
that will do this.

You can interpolate using rcm2rgrid (where the 'rgrid' is about the
same resolution as the 'rcm' and then rgrid2rcm. I speculate that
the 'answers' will not be much different. However,
the interpolation will not be done conservatively.

---
http://climatedataguide.ucar.edu/
Click "Processing" and, then, "Regridding Overview" for some general 
comments.
Cheers
On 3/29/12 6:12 PM, victor almanza wrote:
> Thanks.
>
> It seems I did not ask properly.
>
> Let me rephrase with more detail:
>
> I know there are functions to interpolate from rectilinear to
> curvilinear and viceversa but does not know if some to interpolate from
> a curvilinear grid to a curvilinear grid to start working with.
>
> In case not, is it correct to construct an intermediate file in
> rectilinear-coordinates by interpolating from the WRF file which
> contains the emissions using "rcm2rgrid" ; and then use this new
> intermediate file to interpolate these emissions in the other WRF file
> using "rgrid2rcm".
>
> thanks again
>
>
> Dennis Shea wrote:
>>
>>
>> [1] The next release of NCL (6.1.0-beta; ?late April?) will
>> have conservative regrid capabilities. You can conservatively
>> interpolate from one WRF grid to another.
>>
>> [2] "I want to have a file with the interpolated species of FILE-1
>> in FILE-2 but without missing species in FILE-2". I am sure this
>> can be done. However, the wording is very vague.
>>
>> [3] "Could you please tell me how to do it with NCL." This makes
>> us *very* leery. Our experience is that this type of request
>> means that we end up doing the problem. We just don't have the time.
>> Hence, if you are new to NCL, please read some documentation and
>> look at examples.
>>
>> doc: http://www.ncl.ucar.edu/Document/Manuals/
>> examples: http://www.ncl.ucar.edu/Applications/
>>
>> WRF examples: http://www.mmm.ucar.edu/wrf/OnLineTutorial/Graphics/NCL/
>> *ALL* examples in his library are created and supported by WRF.
>> Please send questions to wrfhelp@ucar.edu
>>
>> On 3/29/12 12:06 PM, victor almanza wrote:
>>> Dear NCL team
>>>
>>> Hope you are doing great.
>>> I ask for your help with the following:
>>>
>>> I have one WRF file with emissions on the first two levels, say FILE-1
>>> and want to map its species to another WRF file which has different
>>> dimensions, say FILE-2; such that mass is conserved in the process.
>>>
>>> At the end I want to have a file with the interpolated species of FILE-1
>>> in FILE-2 but without missing species in FILE-2.
>>> I want to do this in the horizontal plane for these first two levels.
>>>
>>> FILE-1 is about 120x100x2 and FILE-2 is about 100x100x19 both with same
>>> DX and DY. The domain center is slightly moved between each file.
>>>
>>> Could you please tell me how to do it with NCL.
>>>
>>> thanks in advance
>>> best !
>>>
>>> Victor
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>>
>
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