Average Mixing Levels

1
Average Mixing Levels
2
Mixing Levels on Other Shelves

• Vertical averages, 6-38 x 10-5 are higher than on
  most shelves
• New England shelf
• 0.1 1 x 10-5 (Sundermeyer Ledwell, 2001)
• 0.5 x 10-5 (MacKinnon Gergg, 2003)
• Oregon Shelf, 1-5 x 10-5 (Nash Moum, 2001)
• Scotian Shelf, 5 x 10-5 (Sandstrom Oakey, 1995)
• Black Sea Shelf in Summer, 6 x 10-7 (Gregg
  Ozsoy)
• Because these data were taken only near shelf
  breaks?

3
Scaling Differs from Previous Observations
4
Bottom-trapped solibores propagated over the
canyon
5
Issues for a Mixing Process Team

• What mixing processes most affect regional
  models?
• How accurately must mixing be parameterized for
  specified model accuracy?
• How can mixing be represented when it depends on
  variables not in models?

6
Assess Mixing Levels Throughout the Bay

• 14-day cruise
• 300 kHz ADCP on bottom
• Occupy 15-20 stations for one tidal cycle
• NSF proposal to study solibores