Enhanced UV penetration due to ozone crosssection changes induced by CO2 doubling

Models predict that CO• doubling in the desefi• by Miohelangeli et al. (1992) and it includes the atmosphere cools the stratosphere by as much as 10øC. We effects ofabsorption, Rayleigh and aerosol scattering without argue that this effect alone, through the temperature polarization. dependence of the ozone spectrum, can result in an increase In this model, the temperature-dependent ozone absorption of a few percent inUV-B (280-320 nm) penetration at the cross ection data in the UV region are taken from Malicet et Earth's surface. The increase in Erythema-weighted UV el. (1995) with resolution of 0.01 nm at 5 temperatures (218 radiation is about 1%. Future spectral observations ofUV at K, 228 K, 243 K, 273 K, 295 K). Our calculations are the surface could distinguish this effect from any result of performed at the resolution of 0.2 nm. The vertical profile of changes inozone abundance. ozone concentration (Fig. lb) is taken from a standard model