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dc.contributor.author
Lamy, Kévin
dc.contributor.author
Portafaix, Thierry
dc.contributor.author
Josse, Béatrice
dc.contributor.author
Brogniez, Colette
dc.contributor.author
Godin-Beekmann, Sophie
dc.contributor.author
Bencherif, Hassan
dc.contributor.author
Revell, Laura
dc.contributor.author
Akiyoshi, Hideharu
dc.contributor.author
Bekki, Slimane
dc.contributor.author
Hegglin, Michaela I.
dc.contributor.author
Jöckel, Patrick
dc.contributor.author
Kirner, Oliver
dc.contributor.author
Liley, Ben
dc.contributor.author
Marecal, Virginie
dc.contributor.author
Morgenstern, Olaf
dc.contributor.author
Stenke, Andrea
dc.contributor.author
Zeng, Guang
dc.contributor.author
Abraham, N. Luke
dc.contributor.author
Archibald, Alexander T.
dc.contributor.author
Butchart, Neil
dc.contributor.author
Chipperfield, Martyn P.
dc.contributor.author
Di Genova, Glauco
dc.contributor.author
Deushi, Makoto
dc.contributor.author
Dhomse, Sandip S.
dc.contributor.author
Hu, Rong-Ming
dc.contributor.author
Kinnison, Douglas
dc.contributor.author
Kotkamp, Michael
dc.contributor.author
McKenzie, Richard
dc.contributor.author
Michou, Martine
dc.contributor.author
O'Connor, Fiona M.
dc.contributor.author
Oman, Luke D.
dc.contributor.author
Pitari, Giovanni
dc.contributor.author
Plummer, David A.
dc.contributor.author
Pyle, John A.
dc.contributor.author
Rozanov, Eugene
dc.contributor.author
Saint-Martin, David
dc.contributor.author
Sudo, Kengo
dc.contributor.author
Tanaka, Taichu Y.
dc.contributor.author
Visioni, Daniele
dc.contributor.author
Yoshida, Kohei
dc.date.accessioned
2019-08-22T10:10:51Z
dc.date.available
2019-08-22T02:51:18Z
dc.date.available
2019-08-22T10:10:51Z
dc.date.issued
2019
dc.identifier.other
10.5194/acp-19-10087-2019
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/359796
dc.identifier.doi
10.3929/ethz-b-000359796
dc.description.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. Higher increases in UVI are projected in the Northern Hemisphere except for RCP 8.5. At high latitudes, ozone recovery is well identified and induces a complete return of mean UVI levels to 1960 values for RCP 8.5 in the Southern Hemisphere. In the Northern Hemisphere, UVI levels in 2100 are higher by 0.5 % to 5.5 % for RCPs 2.6, 4.5 and 6.0 and they are lower by 7.9 % for RCP 8.5. We analysed the impacts of greenhouse gases (GHGs) and ozone-depleting substances (ODSs) on UVI from 1960 by comparing CCMI sensitivity simulations (1960–2100) with fixed GHGs or ODSs at their respective 1960 levels. As expected with ODS fixed at their 1960 levels, there is no large decrease in ozone levels and consequently no sudden increase in UVI levels. With fixed GHG, we observed a delayed return of ozone to 1960 values, with a corresponding pattern of change observed on UVI, and looking at the UVI difference between 2090s values and 1960s values, we found an 8 % increase in the tropical belt during the summer of each hemisphere. Finally we show that, while in the Southern Hemisphere the UVI is mainly driven by total ozone column, in the Northern Hemisphere both total ozone column and aerosol optical depth drive UVI levels, with aerosol optical depth having twice as much influence on the UVI as total ozone column does.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Copernicus
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Clear-sky ultraviolet radiation modelling using output from the Chemistry Climate Model Initiative
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2019-08-12
ethz.journal.title
Atmospheric Chemistry and Physics
ethz.journal.volume
19
en_US
ethz.journal.issue
15
en_US
ethz.pages.start
10087
en_US
ethz.pages.end
10110
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.scopus
ethz.publication.place
Göttingen
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02717 - Institut für Atmosphäre und Klima / Inst. Atmospheric and Climate Science::03517 - Peter, Thomas / Peter, Thomas
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02717 - Institut für Atmosphäre und Klima / Inst. Atmospheric and Climate Science::03517 - Peter, Thomas / Peter, Thomas
ethz.date.deposited
2019-08-22T02:51:25Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2019-08-22T10:11:09Z
ethz.rosetta.lastUpdated
2021-02-15T05:42:42Z
ethz.rosetta.versionExported
true
ethz.COinS
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