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Island Wake in Shallow Water

Island Wake in Shallow Water. Changming Charles Dong. Institute of Geophysical and Planetary Physics University of California, Los Angeles. Collaborators: James McWilliams, Alexander Shchepetkin. (Courtesy of Cesareo de la Rosa Siqueira at the University of Sao Paulo, Brazil ).

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Island Wake in Shallow Water

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  1. Island Wake in Shallow Water Changming Charles Dong Institute of Geophysical and Planetary Physics University of California, Los Angeles Collaborators: James McWilliams, Alexander Shchepetkin

  2. (Courtesy of Cesareo de la Rosa Siqueira at the University of Sao Paulo, Brazil)

  3. Guadalupe Island, Mexico (SeaWIFS image, acquired on August 20, 1999)

  4. I. Oceanic Response to Wind Wake • II. Oceanic Island Wake (Tomczak, 1988) • III. Interaction between I and II

  5. Oceanic Island Wake (Tomczak, 1988) • a: Deep Water • (e.g.,Heywood et al, 1996; • Coutis and Middleton, 2002; • Dong et al, 2006) • b: Shallow Water • (e.g.,Wolanski et al, 1984; • Signell, 1989)

  6. (Rotation + Stratification + Slope)

  7. Oceanic Island Wake: deep water Centrifugal Instability

  8. Oceanic Island Wake: Deep-water (Dong et al, 2006) (Aristegui et al, 1994)

  9. Oceanic Island Wake: shallow water (Topography)

  10. Oceanic Island Wake: shallow water

  11. Oceanic Island Wake: shallow water

  12. Oceanic Island Wake: shallow water (PV)

  13. Oceanic Island Wake: shallow water Without Bottom Friction

  14. Oceanic Island Wake: shallow water Without Bottom Friction (PV)

  15. Oceanic Island Wake: shallow water

  16. Oceanic Island Wake: shallow water

  17. Oceanic Island Wake: shallow water

  18. Oceanic Island Wake: shallow water

  19. Oceanic Island Wake: shallow water (Chapman and Lentz, 2005, JPO)

  20. Oceanic Island Wake: shallow water

  21. Summary • Oceanic island wake can be categorized into two types: deep water and shallow water in terms of the vorticity generation. • In deep-water wake, vorticity is generated by the lateral boundary. And in the shallow-water wake, the uneven bottom friction is the dominant mechanism. Without the bottom friction, the baroclinic process becomes important and scenario is significant different from that with bottom friction.

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