Clear-sky ultraviolet radiation modelling using output from the Chemistry Climate Model Initiative

摘要: Abstract. We have derived values of the ultraviolet index (UVI) at solar noon using Tropospheric Ultraviolet Model (TUV) driven by ozone, temperature and aerosol fields from climate simulations first phase Chemistry-Climate Initiative (CCMI-1). Since clouds remain one largest uncertainties in projections, we simulated only clear-sky UVI. We compared modelled UVI climatologies against present-day climatological both satellite data (the OMI-Aura OMUVBd product) ground-based measurements (from NDACC network). Depending on region, relative differences between obtained CCMI/TUV calculations ranged −5.9  % 10.6 %. then calculated evolution throughout 21st century for four Representative Concentration Pathways (RCPs 2.6, 4.5, 6.0 8.5). Compared to 1960s values, found an average increase 2100 (of 2 %–4 %) tropical belt (30 ∘  N–30  S). For mid-latitudes, observed a 1.8 % 3.4 % Southern Hemisphere RCPs 4.5 2.3 % decrease RCP 8.5. Higher increases are projected Northern except 8.5. At high latitudes, ozone recovery is well identified induces complete return mean levels 1960 8.5 Hemisphere. In Hemisphere, higher 0.5 % 5.5 % they lower 7.9 % 8.5. analysed impacts greenhouse gases (GHGs) ozone-depleting substances (ODSs) comparing CCMI sensitivity (1960–2100) with fixed GHGs or ODSs their respective levels. As expected ODS levels, there no large consequently sudden levels. With GHG, delayed corresponding pattern change UVI, looking difference 2090s 8 % during summer each hemisphere. Finally show that, while mainly total column, column optical depth drive having twice as much influence does.