 The study examines changes in the Brewer Dobson circulation, BDC, for 1980-2018 using satellite microwave-sounding unit MSUV-AMSU, lower stratospheric temperature observations and ERA interim re-analysis data. The annual mean BDC accelerated for 1980-1999 but decelerated for 2000-2018, with the changes largely driven by the Southern Hemisphere, SH. The study shows that the annual mean BDC has accelerated in the last 40 years with a relative strengthening of one point, seven per cent per decade, driven by both Northern Hemisphere and SH cells. Significant SH radiative warming is also identified in September for 2000-2018, after excluding the year 2002 when a very rare SH stratospheric sudden warming occurred, supporting the view that healing of the Antarctic ozone layer has now begun to occur during the month of September. This article was authored by Qiong Fu, Susan Solomon, Amidae Parlovan, and others.