It was assumed that UV was constant, which means measured ozone variation had another cause. (drtimball.com)
«The Arctic stratospheric ozone variations lead ENSO by 18 — 24 months, which means that it could be possible to extend the ENSO predictability from the current forecast level of several months up to around one and a half years in advance,» Jianping Li of Beijing Normal University told environmentalresearchweb. (environmentalresearchweb.org)
They produced a static condition when the major natural mechanism causing ozone variation over Antarctica is an intense atmospheric circulation system associated with the Circumpolar Vortex. (drtimball.com)