Abstract

Ground-based microwave measurements of middle atmosphere constituents have made important contributions over the years. Among these are the most extensive series of mesospheric water vapor measurements to date¹, the observation that antarctic ozone depletion does not extend to the upper stratosphere², the only extant measurement of the diurnal variation of ClO³, the first observation of the diurnal variation of mesospheric ozone⁴, the first observation of very low concentrations of N₂O in the polar vortex⁵, and the first detection of enhanced ClO in the antarctic lower stratosphere⁶.

© 1991 Optical Society of America