(1) Geophysical fluids: phenomenology and dynamics of rotating, stratified flow. (2) Potential vorticity: Dynamic significance and kinematic interpretation. (3) Importance of mixing for maintenance of ocean pycnocline and global overturning circulation: ocean energetics, a little on thermocline theories and/or Sandstrom's theory. (4) Tracer Observations in the ocean (and atmosphere): Turbulent mixing from dye releases, maybe something on surface stirring/mixing diagnostics from floats. (5) Tracer cascades: theory and observational support.