[ncl-talk] Question regarding wavenumber-frequency spectrum

[Dr. Suman Maity]

 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
>> ++++++++++++++++++++++++++++++++++++++++++
>> _______________________________________________
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>
>
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