Trends in atmospheric temperatures from 850 to 30 mbar are estimated, using radiosonde data from 1957 through 1979. These estimated trends are not significantly different from zero, but they do show a ''greenhouse'' type profile. Trends calculated with 1968 through 1979 data are compared with model estimates for the period 1971 through 1981. The major differences are that the data show more cooling between 200 and 100 mbar than the model predicts and less warming at 850 mbar than the model predicts.