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

Lamy, Kévin; Portafaix, Thierry; Josse, Béatrice; Brogniez, Colette; Godin-Beekmann, Sophie; Bencherif, Hassan; Revell, Laura; Akiyoshi, Hideharu; Bekki, Slimane; Hegglin, Michaela I.; Jöckel, Patrick; Kirner, Oliver; Liley, Ben; Marecal, Virginie; Morgenstern, Olaf; Stenke, Andrea; Zeng, Guang; Abraham, N. Luke; Archibald, Alexander T.; Butchart, Neil; ... mehr

Abstract:
We have derived values of the ultraviolet index (UVI) at solar noon using the Tropospheric Ultraviolet Model (TUV) driven by ozone, temperature and aerosol fields from climate simulations of the first phase of the Chemistry-Climate Model Initiative (CCMI-1). Since clouds remain one of the largest uncertainties in climate projections, we simulated only the clear-sky UVI. We compared the modelled UVI climatologies against present-day climatological values of UVI derived from both satellite data (the OMI-Aura OMUVBd product) and ground-based measurements (from the NDACC network). Depending on the region, relative differences between the UVI obtained from CCMI/TUV calculations and the ground-based measurements ranged between −5.9 % and 10.6 %.

We then calculated the UVI evolution throughout the 21st century for the four Representative Concentration Pathways (RCPs 2.6, 4.5, 6.0 and 8.5). Compared to 1960s values, we found an average increase in the UVI in 2100 (of 2 %–4 %) in the tropical belt (30∘ N–30∘ S). For the mid-latitudes, we observed a 1.8 % to 3.4 % increase in the Southern Hemisphere for RCPs 2.6, 4.5 and 6.0 and found a 2.3 % decrease in RCP 8.5. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000097983
Veröffentlicht am 04.09.2019
Coverbild
Zugehörige Institution(en) am KIT Steinbuch Centre for Computing (SCC)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 1680-7324
KITopen-ID: 1000097983
HGF-Programm 46.11.01 (POF III, LK 01)
Erschienen in Atmospheric chemistry and physics
Band 19
Heft 15
Seiten 10087–10110
Vorab online veröffentlicht am 12.08.2019
Nachgewiesen in Web of Science
Scopus
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