Temperature Trends in the Stratosphere and Lower Mesosphere of the Northern Hemisphere

Rocketsonde-derived temperature fluctuations within the northern hemisphere are examined for the stratosphere and lower mesosphere in seasonal basis for the years 1969 - 78, inclusive. The rocketsonde records presented here are homogeneous because they are mostly based on the Datasone system. It is suggested that stratospheric-lower mesospheric temperature variations are about one order of magnitude larger than those recorded in the literature before. The main feature in all seasons is that the cooling trend has maximum values at low latitudes in the lower mesosphere.