UV radiation below an Arctic vortex with severe ozone depletion

[摘要] The erythemally weighted (UV) irradiance below the severely depleted Arcticvortices in spring 1996 and 1997 were substantially elevated. On average theUV increased 36 and 33% relative to the 1979-1981 mean assuming clearskies from day 80-100 in 1996 and 1997, respectively. On clear sky dayslarge regions of the Arctic experienced maximum UV increases exceeding 70and 50% on single days in 1996 and 1997, respectively. A minor fractionof these increases are not anthropogenic and have a dynamical origin as seenby comparison to 1982, when hardly any ozone depletion is expected.

[学科分类] 大气科学