COMPARISON OF CLO MEASUREMENTS BY AIRBORNE AND SPACEBORNE MICROWAVE RADIOMETERS IN THE ARCTIC WINTER STRATOSPHERE 1993

In February 1993 measurements of chlorine monoxide ClO, one of the key substances in catalytic ozone destruction, were performed over Scandi navia by two microwave receivers, the Submillimeter Atmospheric Sounde r (SUMAS) on board the German research aircraft FALCON and the Microwa ve Limb Sounder (MLS) on board the Upper Atmospheric Research Satellit e (UARS). High ClO concentrations (>1 ppb) inside the polar vortex at approximately 20 km altitude were detected by both experiments. A comp arison shows good agreement of both sensors in the location of enhance d ClO.