Abstract: This paper reviews the results of the first systematic parallel measurements with a Dobson-type spectrophotometer and an M-83 filter ozonometer. Measurements were performed at the University of Sofia during a period of one ...

Abstract: A method for computing vertical ozone profiles from known total ozone data based on about 8000 vertical ozone profiles taken by the Umkehr method at 30 stations around the world is presented. The computed correlation ...

Abstract: This study is devoted to a comparison between the vertical ozone distribution profiles obtained using indirect Umkehr and direct ozonesonde methods. In the three year period 1963?1965, there were 17 days with simultaneous ...

Abstract: During the last few years, increases in tropospheric ozone concentration have been detected and the need for more study has been recognized. There is very little knowledge about surface ozone background concentrations prior ...

Abstract: Studies of the amount of total ozone at many observatories show that the negative 1983 deviation from the long-term average exceeded 2σ, and was the greatest in magnitude for an annual deviation in their entire record., ...

Abstract: Seasonal ozone profiles, representative of the autumn and winter-spring periods, are computed from 20 ascents, made using electro-chemical sensors in sondes, for Christchurch, New Zealand. The seasonal changes between the ...