non-liner saturation of vertically propagating Rossby waves

work

今日のネタその 1.

  • Giannitsis, C. and R.S. Lindzen (2001) Non-linear saturation of vertically propagating Rossby waves. accepted J. Atmos. Sci.pdf

結論

  • The growth of vertically propagating planetary scale Rossby waves does give rise to wave 'breaking' as indicated by the wrapping of PV contours
  • The saturation of the primary Rosbby wave is not due to wave breaking. Rather, it is associated with wave-mean flow interactions wherein either critical surfaces or reflecting surfaces are created. The development of these features is associated with the development of closed (Eulerian) streamlines.
  • Wave-wave interactions are quantitatively important. However, the most important wave-wave interactions involve wavenumbers 1 and 2, and these are not crucial for the 'breaking' signature.