Ground-based millimeter-wave observations of ozone in the upper stratosphere and mesosphere at Tsukuba and Nagoya Original Research Article

We report on ground-based observations of the upper stratospheric and mesospheric ozone by using two millimeter-wave radiometers at the National Institute for Environmental Studies (NIES) in Tsukuba and Nagoya University since October 1995 and January 1992, respectively. The 61,5 to 60,6 transition of ozone at 110.836 GHz was observed, and vertical profiles from 38 to 76 km were retrieved. Comparison with the radiometer and co-located ozone lidar results at 38 km shows reasonable agreement with each other, indicating that the radiometer data are reliable. From 19 months of observations, we have clearly detected seasonal and short-term variations of ozone at various altitudes.