Research Interests

Dynamics of the middle atmosphere, in particular:

• Interactions with atmospheric/oceanic oscillations
• Sudden stratospheric warmings
• The Brewer-Dobson circulation
• Wave mean-flow interaction

Animations

The Antarctic Ozone Hole Split, September 2002

This is the only major sudden stratospheric warming event ever detected on the southern hemisphere

The Aleutian High, December 1995

A large anticyclonic system, the Aleutian High, displaces the northern hemispheric polar vortex off the pole

A major sudden stratospheric warming event, 15 December, 1998

Maps: Geopotential height - Temperature