[ncl-talk] get sensible heat(HFX) values from wrfout at specific height.

[Dennis Shea]

Also, I suggest contacting   wrfhelp at ucar.edu

They are *the* experts in all things related to WRF

Good luck

On Mon, Jul 25, 2016 at 10:02 AM, Bill Ladwig <ladwig at ucar.edu> wrote:

> Hi Ananya,
>
> While this may be different for LES runs, I'm pretty sure that the HFX
> variable is still going to be the upward heat flux at the surface, which is
> a 2D variable.  In order to do any vertical interpolation, you would need a
> three dimensional heat flux variable.  You're trying to use a
> one-dimensional interpolation routine, which is really meant for one
> vertical column in a three-dimensional variable.  If you had a 3D heat flux
> variable, you would want to use wrf_interp_3d_z or wrf_user_intrp3d.
>
> However, since all you have is the 2D heat flux at the surface, I think
> you're going to have to resort to the radiation equations for calculating
> the 20 m, 30 m, and 100 m values.  Off the top of my head, I don't think
> NCL has anything built in to do this for you, so you'll probably have to
> implement this yourself.  It's been a long time since I took radiation, so
> if all this is new to you, start with the concept of 'optical depth' and go
> from there.  Maybe others have better suggestions here.
>
> Bill
>
> On Mon, Jul 25, 2016 at 1:51 AM, ananya sritawan <ananbeam76 at gmail.com>
> wrote:
>
>> Dear all
>>
>> I have been working on WRF-LES and now I am trying to get a data at a
>> specific height says 20m 30m 100m.
>> The data that I want to obtain is sensible heat flux from my wrfout at
>> 20m 30m and 100m. Can we do that? Therefore I tried to look for the ncl
>> script to do so, I have tried many set of interpolate script but I cannot
>> accomplished my goal. Then I found one script which have been successfully
>> run by other user, then I modified the script according to my need with my
>> very little skill of coding. When I ran the script, I've got an error about
>> the dimension. something like this : (when I use  wrf_interp_1d)
>>
>> fatal:wrf_interp_1d: The v_in, z_in, and z_out arrays must be the same
>> number of dimensions
>>
>> fatal:["Execute.c":8575]:Execute: Error occurred at or near line 51 in
>> file fillvalue100
>>
>> which I have tried to check how to make it into the same number of
>> dimension, but I didn't found one although I still quite not sure its
>> dimension process. I also attached the script and my nameless input
>> below(in the script "fillvalue100" for getting data at 100m).
>>
>> I am working with ncl-6.3.0 on Darwin Kernel mac os x
>>
>> I'm a newbie for both wrf and ncl, so any suggestion would be greatly
>> appreciate. I really need help.
>>
>> Best regard,
>>
>>
>> --
>> Ananya SRITAWAN
>> Hydro-Environment Laboratory
>> Graduate School of Environmental Studies, Tohoku University.
>>
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