UARS MLS observations of stratospheric ozone and chlorine monoxide are described. Enhanced concentrations of ClO, the predominant form of reactive chlorine responsible for ozone depletion, are seen within both the northern and southern winter polar vortices. In the southern hemisphere, this leads directly to the development of the annual Antarctic ozone hole. While ozone depletion is also observed in the north, it is less severe and there is considerable interannual variability.

stratosphere ozone chlorine monoxide Microwave Lim↗

NASA NTRS1994

Validation of UARS MLS C10 Measurements

This paper describes the validation of stratospheric C10 measurements by the MLS on the UARS. The comparisons done to date between MLS and other measurements of C10 indicate general agreement to within the estimated MLS uncertainties and the uncertainties of the comparative measurements.

Microwave Limb Sounder MLS↗

NASA NTRS1994

Upper Tropospheric Water Vapor from UARS MLS

Initial results of upper tropospheric water vapor obtained from the Microwave Limb Sounder (MLS) on the Upper Atmosphere Research Satellite (UARS) are presented.

near-global↗

NASA NTRS1990

Ozone measurements from the Balloon Intercomparison Campaign

Measurements of the Balloon Intercomparison Campaign (BIC), conducted during fall, 1982 (BIC-1) and summer, 1983 (BIC-2), are reported. Results of five remote and two in situ techniques agree (with a few exceptions) within 95-percent confidence level uncertainties and generally within 15 percent above 20 km. Weighted mean profiles, which best represent conditions during the campaign, are used as a comparison standard. Accuracies of experiments indicated by BIC generally confirm estimated uncertainties for ECC sondes, UV photometry, and microwave emission experiments, are somewhat better for far-IR emission and IR absorption experiments, and are somewhat worse for IR emission and solar UV absorption experiments. The large collection of BIC measurements confirms a problem reported earlier with current theoretical modeling of ozone near 40 km.

Robbins, D.↗