[ncl-talk] about frontogenesis

[Tianhang Zhang]

THank you very much！
It is very useful for me！

Best，
Tianhang

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________________________________
发件人: Barry Lynn <barry.h.lynn at gmail.com>
发送时间: Tuesday, August 17, 2021 3:50:15 PM
收件人: Dennis Shea <shea at ucar.edu>
抄送: Tianhang Zhang <tianhang.zhang at postgrad.manchester.ac.uk>; ncl-talk at mailman.ucar.edu <ncl-talk at mailman.ucar.edu>
主题: Re: [ncl-talk] about frontogenesis

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<mailto: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<mailto: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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