Bill Randel provided multiple reference climatologies, which include the monthly and zonal means of temperature, wind, eddy momentum flux, eddy heat flux, EP flux divergence, and geopotential height as well as the daily zonal mean geopotential heights from different models. Additional data sets encompass tropopause heights derived from NCEP data and the zonal mean trace gas distributions for CH4,H2O, O3, HF, HCl, NO2 (sunrise and sunset), NO (sunrise and sunset), ClO, N2O, and HNO3 from UARS measurements. Global ozone trends as a function of latitude and height for 1979-1996 are available as well.