[ncl-talk] about frontogenesis

[Barry Lynn]

Hello:

Sorry for not responding earlier -- I was travelling.

Here is an example program where I calculated frontogenesis.  I obtained it
from someone else, who I can't recall at the moment.  I modified it a bit.

Perhaps this will help you?

On Mon, Aug 9, 2021 at 12:59 AM Dennis Shea via ncl-talk <
ncl-talk at mailman.ucar.edu> wrote:

> NCL does not have an explicit '*frontogenesis*' function.
> Certainly, one could be written but, as far as I know, nobody has done
> this.
> --------
> NCL does have *'qvector_isobaric
> <https://www.ncl.ucar.edu/Document/Functions/Contributed/qvector_isobaric.shtml>*'
> and a variant  '*qvector_isobaric_cfd*
> <https://www.ncl.ucar.edu/Document/Functions/Contributed/qvector_isobaric_cfd.shtml>'
>
>
> Q-vectors can be used to understand physical processes such as vertical
> motion and frontogenesis.
>
> However, NCL's functions are for global grids and the needed terms are
> calculated using spherical harmonics.
> These *can not* be used for WRF grids.
>
> --------
> Perhaps, the WRF community can offer some assistance.
>
>
> On Sun, Aug 8, 2021 at 3:09 PM Tianhang Zhang via ncl-talk <
> ncl-talk at mailman.ucar.edu> wrote:
>
>> Hi,
>> I would like to know how to use NCL to calculate frontogenesis using wrf
>> data. Do you have any scripts?
>> Thank you
>>
>> Best,
>> Tianhang
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-- 

Barry H. Lynn, Ph.D
Senior Associate Scientist, Lecturer,
The Institute of the Earth Science,
The Hebrew University of Jerusalem,
Givat Ram, Jerusalem 91904, Israel
Tel: 972 547 231 170
Fax: (972)-25662581

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