Spectrometric measurements of total NO2 in different regions of the globe

The paper reviews the results of measurements of the total NO2 contents in different regions of the globe: in the Antarctic region, in the Atlantic Ocean, at the Zvenigorod Scientific Station of the Institute of Atmospheric Physics. Total NO2 obtained at the Antarctic station of Molodezhnaya in spring 1987 was very low until late November, about the time of the stratospheric warming when the filling of the ozone `hole' began. Measurements at the Antarctic station of Mirny in 1988 show the summer maximum and the later decrease in total NO2 in accordance with the NO2 annual variation. Total NO2 measured in the Weddell Sea (West Antarctic) during September - October 1989 exhibits large variations connected with the evolution of the stratospheric circumpolar vortex. Measurements aboard a ship in the Atlantic Ocean in May 1988 show the increase with latitude in total NO2 and total ozone, most pronounced in the region of the northern subtropic jet stream.