[ncl-talk] Vorticity Advection with NCL

[Lara Quitián Hernández]

Hello,

Thank you. In the case of calculating the horizontal advection for
*vorticity*, it would be better to use the direct WRF variable ( vo =
wrf_user_getvar(a,"*avo*",-1)) or define it via different functions:
https://www.ncl.ucar.edu/Applications/vort.shtml

The only example in the link defines the Vorticity like this:

;************************************************
; calculate vorticity on a Gaussian Grid
; scale for visual convenience
;************************************************
  scale = 1.e05
  vrt   = u                                      ; retain coordinates
  vrt   = uv2vrG_Wrap(u,v) * scale
  vrt at long_name = "vorticity"
  vrt at units     = "scaled"


However, my simulations are generated on a Lambert Conformal grid
projection, not Gaussian one. Does this change the procedure to calculate
it?

Regards,
Lara

2018-05-16 14:28 GMT+02:00 Dennis Shea <shea at ucar.edu>:

> Maybe:
>
> https://www.ncl.ucar.edu/Document/Functions/Contributed/advect_variable.
> shtml
>
> 'x' would be vorticity
>
> Good Luck
>
> On Wed, May 16, 2018 at 4:01 AM, Lara Quitián Hernández <
> laraquitianhernandez at gmail.com> wrote:
>
>> Good morning,
>>
>> I would like to know if there is a possibility of calculating the
>> Vorticity Advection with NCL.
>>
>> Thanks in advance.
>>
>> Regards,
>> Lara
>>
>>
>> --
>>
>>
>> *Lara Quitián Hernández, PhD Student*
>> Departamento de Física de la Tierra, Astronomía y Astrofísica
>> Facultad de Ciencias Físicas
>> Ciudad Universitaria, Plaza Ciencias, 1
>> <https://maps.google.com/?q=Ciudad+Universitaria,+Plaza+Ciencias,+1+28040+Madrid.+Spain&entry=gmail&source=g>
>> 28040 Madrid. Spain
>> <https://maps.google.com/?q=Ciudad+Universitaria,+Plaza+Ciencias,+1+28040+Madrid.+Spain&entry=gmail&source=g>
>> Email: lquitian at ucm.es <mlunar at aemet.es>
>>
>>
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>


-- 


*Lara Quitián Hernández, PhD Student*
Departamento de Física de la Tierra, Astronomía y Astrofísica
Facultad de Ciencias Físicas
Ciudad Universitaria, Plaza Ciencias, 1
28040 Madrid. Spain
Email: lquitian at ucm.es <mlunar at aemet.es>
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