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SUMMARY:The dynamics of the transition from the beam-like internal tides t
 o shorter nonlinear waves on the continental shelf - Zihua Liu (Woods Hole
  Oceanographic Institution)
DTSTART:20221206T110000Z
DTEND:20221206T113000Z
UID:TALK183770@talks.cam.ac.uk
DESCRIPTION:The origin of onshore propagating large-amplitude internal sol
 itary waves is intimately linked with the interaction of the barotropic ti
 de\, ambient stratification and topography. An complication is that the ra
 diated internal tide at the shelf break is often dominated by a vertically
  propagating beam\, while the solitary waves that eventually emerge have s
 ingle vertical mode structure and propagate horizontally. This talk consid
 ers idealized stratification\, topography\, and forcing to focus on the un
 derlying dynamics and uncover the general conditions that promote or inhib
 it the disintegration of the incident beam into modal internal tides and i
 nternal solitary waves on the shelf. Numerical simulations are based on no
 n-hydrostatic form of the incompressible Boussinesq equations. The structu
 re of the stratification and the ratio of the vertical scale of the beam t
 o the depth of the thermocline are crucial on the beam evolution onto the 
 shelf.
LOCATION:Seminar Room 1\, Newton Institute
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