Lidar Measurements of Ozone and Temperature During the December 1998 Arctic Stratosphere Warming

Lidar and ozonesonde observations of ozone structures in the Arctic stratosphere are presented from measurements at the Eureka NSDC station at 80°N 86°W. Examples of the profiles are shown for various conditions both inside and outside the polar vortex. Several mechanisms are responsible for these structures including: intrusions, filamentation, and advection. The structures are sometimes associated with warming events or rapid declines in potential vorticity as seen at the station.