An analysis of northern middle-latitude Umkehr measurements corrected for stratospheric aerosols for 1979–1986

摘要: Umkehr observations of ozone profile for five northern middle-latitude Dobson spectrophotometer stations are objectively corrected stratospheric aerosol during the period 1979–1986. The corrections done by means theoretical calculations, using and aerosols. Stratospheric data to correct measurements derived from ozonesonde provided lidar in hemisphere middle latitudes. Optical properties existing after major injection El Chichon surface aircraft photometric situ size distribution. display some noteworthy reductions upper stratosphere. magnitude these does not seem be extraordinary when considering features seen long-term data. However, rates may extraordinary, example, layers 8 9, which decreases concentration 1979–1986 were 9% 15% respectively,