title: Geophysics. Longitudinal variation in springtime ozone trends.
abstract: Satellite measurements indicate that mid-latitude ozone depletion in the Northern Hemisphere spring during 1979-97 was worst over Europe and Russia. Here we show that these longitudinal differences in ozone trends are due to a combination of decadal variations in the circulation and transport of ozone-depleted air from the polar vortex. Any increase in ozone depletion in the polar vortex as a result of future cooling of the stratosphere would therefore be particularly bad over Europe and Russia.
authors.affiliation: Danish Meteorological Institute, Lyngbyvej 100, 2100 Copenhagen, Denmark. bk@dmi.dk
authors.forename: B M
authors.initials: BM
authors.lastname: Knudsen
authors.forename: S B
authors.initials: SB
authors.lastname: Andersen