[ncl-talk] Question regarding wavenumber-frequency spectrum

[Dennis Shea]

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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