• 11:00 Long Term Changes in Tropospheric Ozone Mediated by Interaction with Snow and Ice at High Polar Latitudes
  Presenter: S.J. Oltmans
• 11:15 Development of an Autonomous Buoy (the "O-Buoy") for Long Term Studies of O₃, CO₂, and BrO Over the Arctic Ocean
  Presenter: P. B. Shepson
• 11:30 The Role of Atmospheric Surface and Boundary Layer Dynamics in Arctic Ozone Depletion Episodes
  Presenter: R.M. Staebler
• 11:45 Ozone depletion in the springtime boundary layer over the Central Arctic Ocean observed during IPY and comparison with previous non-coastal observations
  Presenter: H.-W. Jacobi
• 12:00 Polar cyclones and Antarctic tropospheric ozone depletion events
  Presenter: A.E. Jones