[ncl-talk] Question regarding wavenumber-frequency spectrum

[Dennis Shea]

I would say most (?all?) the figures were generated using NCL.

Possibly, the "diabatic heating (Q1)" was calculated using NCL  as
described *here* <http://www.ncl.ucar.edu/Applications/wind.shtml> (see
bottom).

However, to understand what they have done to get "meridional wave number"
would require
reading the paper to see what was done.  That is over and above the purpose
of ncl-talk (NCL language questions not science).
===
I would suggest contacting one of the authors.

Good Luck


On Fri, Oct 16, 2020 at 8:41 AM Dr. Suman Maity <suman.buie at gmail.com>
wrote:

> Hi Dennis
> I am sorry for my late reply. Please find attached one published article
> where the author used wavenumber-frequency spectra in meridional direction
> (Fig. 5). I need that plot. Any sort of help will be highly appreciated.
> Thanking you,
>
> Best
> Suman
> ++++++++++++++++++++++++++++++++++++++++++
> Dr. Suman Maity
> Research Associate
> School of Atmospheric Science
> Sun Yat-sen University, Zhuhai campus,Tangjiawan Town
> Zhuhai, Guangdong, Postcode-519082,China.
> Phone:+86-13543861045 (China), +91-9732636778 (India)
> skype: reach2suman
> https://www.researchgate.net/profile/Suman_Maity
> ++++++++++++++++++++++++++++++++++++++++++
>
>
> On Wed, Sep 23, 2020 at 12:45 AM Dennis Shea <shea at ucar.edu> wrote:
>
>> 1) "I mean what the negative wavenumber physically mean?"
>>      A negative wave number has the same meaning as a positive wave
>> number except is it for westward propagating waves.
>>
>> 2) Re: ""*mjo_wavenum_freq_season*" and "*mjo_wavenum_freq_season_plot*"
>> only applicable for zonal waves?"
>>     Yes. They require cyclic data in longitude.
>>
>> 3) "I am interested in the meridional waves. I mean I need the
>> wavenumber-freqency spectra in meriodional direction. How to implement that?
>> Any sort of suggestion will be highly appreciated."
>>
>> I am not aware of any work done in "wavenumber-freqency spectra in
>> meriodional direction'
>>
>> ===
>>
>>
>>
>> On Sun, Sep 20, 2020 at 7:00 AM Dr. Suman Maity via ncl-talk <
>> ncl-talk at mailman.ucar.edu> wrote:
>>
>>> Hi all
>>> I have couple of queries regarding wavenumber-freqency plots using "
>>> *mjo_wavenum_freq_season*" which are mentioned below:
>>> 1. I saw the function calculates wavenumber and frequency. As per my
>>> knowledge, positive frequency correspnds to easward propogating waves while
>>> negative frequency associated with westward waves. But what about the
>>> wavenumber? I mean what the negative wavenumber physically mean? will you
>>> please comment?
>>> 2. Are both of these functions "*mjo_wavenum_freq_season*" and "
>>> *mjo_wavenum_freq_season_plot*" only applicable for zonal waves? I am
>>> interested in the meridional waves. I mean I need the wavenumber-freqency
>>> spectra in meriodional direction. How to implement that?
>>> Any sort of suggestion will be highly appreciated.
>>> Thanking you,
>>>
>>> Best
>>> Suman
>>> ++++++++++++++++++++++++++++++++++++++++++
>>> Dr. Suman Maity
>>> Research Associate
>>> School of Atmospheric Science
>>> Sun Yat-sen University, Zhuhai campus,Tangjiawan Town
>>> Zhuhai, Guangdong, Postcode-519082,China.
>>> Phone:+86-13543861045 (China), +91-9732636778 (India)
>>> skype: reach2suman
>>> https://www.researchgate.net/profile/Suman_Maity
>>> ++++++++++++++++++++++++++++++++++++++++++
>>> _______________________________________________
>>> ncl-talk mailing list
>>> ncl-talk at mailman.ucar.edu
>>> List instructions, subscriber options, unsubscribe:
>>> https://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>
>>
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