Spatial variation of ozone depletion rates in the springtime Antarctic polar vortex.

摘要: An area-mapping technique, designed to filter out synoptic perturbations of the Antarctic polar vortex such as distortion or displacement away from pole, was applied Nimbus-7 TOMS (Total Ozone Mapping Spectrometer) data. This procedure reveals detailed morphology temporal evolution column O3. The results for austral spring 1987 suggest existence a relatively stable collar region enclosing an interior that is undergoing large variations. There tentative evidence quasi-periodic (15 20 days) O3 fluctuations in and upwelling tropospheric air late spring. A simplified photochemical model loss area-mapped are used constrain chlorine monoxide (ClO) concentrations springtime vortex. required account observed higher than those previously reported by Anderson et al. but comparable their recently revised values. However, rates could be larger deduced here because underestimates total near terminator. uncertainty, together with uncertainties associated measurements acquired during Airborne Experiment, suggests early spring, closer center, there may even ClO have yet been detected.