Trends in the Southern Hemisphere tropospheric circulation.

An analysis has been made of the mean height and wind fields throughout the troposphere of the S Hemisphere for May 1972-Jan 1978 based on daily synoptic hemispheric analyses of geopotential height produced by the Australian World Meteorological Center. While the means resemble those previously obtained in a series of atlases based primarily on the period 1957-66, significant differences do exist. The reality of these trends is investigated using station data.-from Authors