[ncl-talk] about frontogenesis

[Barry Lynn]

You're welcome. Feel free to share it.

On Tue, Aug 17, 2021 at 8:53 PM Tianhang Zhang <
tianhang.zhang at postgrad.manchester.ac.uk> wrote:

> THank you very much！
> It is very useful for me！
>
> Best，
> Tianhang
>
> 获取 Outlook for iOS <https://aka.ms/o0ukef>
> ------------------------------
> *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> 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
>
> Weather It Is, LTD
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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

Weather It Is, LTD
Weather and Climate Focus
https://weather-it-is.com <http://weather-it-is.com>
Jerusalem, Israel
Local: 02 930 9525
Cell: 054 7 231 170
Int-IS: x972 2 930 9525
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