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Planetary Wave Resonance

Discussion in 'Environmental Discussion' started by bwilson4web, Mar 28, 2017.

  1. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Source: http://www.nature.com/articles/srep45242

    . . . the Northern Hemisphere summer have been shown to be associated with the presence of high-amplitude quasi-stationary atmospheric Rossby waves within a particular wavelength range (zonal wavenumber 6–8). The underlying mechanistic relationship involves the phenomenon of quasi-resonant amplification (QRA) of synoptic-scale waves with that wavenumber range becoming trapped within an effective mid-latitude atmospheric waveguide. Recent work suggests an increase in recent decades in the occurrence of QRA-favorable conditions . . .​

    Looks to be an interesting read of an open paper.

    You can really see these waves in images from: Watch Earth Spin Through a Full Year in This Spectacular Time-Lapse Video

    Bob Wilson
     
    #1 bwilson4web, Mar 28, 2017
    Last edited by a moderator: Mar 29, 2017
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  2. tochatihu

    tochatihu Senior Member

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    Rossby waves have also recently been detected on the Sun.
     
    #2 tochatihu, Mar 30, 2017
  3. bwilson4web

    bwilson4web BMW i3 and Model 3

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    DARN!

    It may be possible to predict the solar flux if they are a feedback mechanism. The Russian papers about a solar minimum in the next "n" cycles might have a basis in fact.

    Bob Wilson
     
    #3 bwilson4web, Mar 30, 2017
  4. tochatihu

    tochatihu Senior Member

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    There are several predictions of future sunspot cycles. Most (perhaps all?) so far are based on extrapolation of low-frequency signals in the previous 24 cycles. Which are all we know with useful temporal resolution. So, empirical not mechanistic.

    Mechanistic is going to be quite a challenge, given that no one yet can explain why the magnetic field reverses so regularly. Or at all. I mean, dang...

    I've a few things pulled together for a new solar cycle thread here. Sooner or later that will get triggered - either by a new interesting publication or solar event.
     
    #4 tochatihu, Mar 30, 2017
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