This study considers several sample days of tropospheric column ozone (TRCO) obtained by subtracting LIMS stratosphere column ozone (SCO) from TOMS total ozone. TRCO is elevated in the southern hemisphere tropics near west Africa during November 1978. Conversely, there are small biases in the LIMS ozone of the lower stratosphere that affect the accuracy of its SCO values in March and in May 1979; calculated zonal variations of TRCO are spurious on those days.

This study compares analysis of trends in stratospheric water vapor from the Halogen Occultation Experiment satellite instrument with those from local frost-point hygrometers (FPHs) at 30 and 50 hPa over Boulder, Colorado (40°N), for 1993 to 2005. The FPH measurements are assumed correct. However, the seasonal sampling by HALOE is marginal from 2002 to 2005, such that its trends have a bias after 2001. Trend comparisons for 1993 to 2002 at 30 hPa agree within the uncertainties of both datasets.

Ozone (O₃) is an excellent tracer of atmospheric transport processes in the middle atmosphere during Arctic winter. The Nimbus 7 LIMS O₃ profiles of late October 1978 through May 1979 now extend to the upper mesosphere via its Version 6 (V6) algorithm. We describe the generation of zonal Fourier coefficients from the profiles, followed by their gridding to daily synoptic maps of O₃. We then present several examples of how V6 O₃ varies in the upper stratosphere and mesosphere during winter.