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

Lamy, K. and Portafaix, T. and Josse, B. and Brogniez, C. and Godin-Beekmann, S. and Bencherif, H. and Revell, L. and Akiyoshi, H. and Bekki, S. and Hegglin, M. I. and Jöckel, Patrick and Kirner, O. and Liley, B. and Marecal, V. and Morgenstern, O. and Stenke, A. and Zeng, G. and Abraham, N. L. and Archibald, A. T. and Butchart, N. and Chipperfield, M. P. and Di Genova, G. and Deushi, M. and Dhomse, S. S. and Hu, R.-M. and Kinnison, D. and Kotkamp, M. and McKenzie, R. and Michou, M. and O'Connor, F. M. and Oman, L. D. and Pitari, G. and Plummer, D. A. and Pyle, J. A. and Rozanov, E. and Saint-Martin, D. and Sudo, K. and Tanaka, T. Y. and Visioni, D. and Yoshida, K. (2019) Clear-sky ultraviolet radiation modelling using output from the Chemistry Climate Model Initiative. Atmospheric Chemistry and Physics (ACP), 19 (15), pp. 10087-10110. Copernicus Publications. DOI: 10.5194/acp-19-10087-2019 ISSN 1680-7316

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Official URL: https://www.atmos-chem-phys.net/19/10087/2019/

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.

Item URL in elib:https://elib.dlr.de/128762/
Document Type:Article
Title:Clear-sky ultraviolet radiation modelling using output from the Chemistry Climate Model Initiative
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lamy, K.LACy, Laboratoire de l'Atmosphère et des Cyclones (UMR 8105 CNRS, Université de La Réunion, Météo-France), Saint-Denis de La Réunion, FranceUNSPECIFIED
Portafaix, T.LACy, Laboratoire de l'Atmosphère et des Cyclones (UMR 8105 CNRS, Université de La Réunion, Météo-France), Saint-Denis de La Réunion, FranceUNSPECIFIED
Josse, B.Centre National de Recherches Météorologiques (CNRM) UMR 3589, Météo-France/CNRS, Toulouse, FranceUNSPECIFIED
Brogniez, C.Laboratoire d'Optique Atmosphérique (LOA), Université de Lille, Faculté des Sciences et Technologies, Villeneuve d'Ascq, FranceUNSPECIFIED
Godin-Beekmann, S.Laboratoire Atmosphères, Milieux, Observations Spatiales, Service d'Aéronomie (LATMOS), CNRS, Institut Pierre Simon Laplace, Pierre et Marie Curie University, Paris, FranceUNSPECIFIED
Bencherif, H.School of Chemistry and Physics, University of KwaZulu Natal, Durban, South AfricaUNSPECIFIED
Revell, L.Institute for Atmospheric and Climate Science, ETH Zürich (ETHZ), Zürich, Switzerlandhttps://orcid.org/0000-0002-8974-7703
Akiyoshi, H.National Institute of Environmental Studies (NIES), Tsukuba, Japanhttps://orcid.org/0000-0001-6463-9004
Bekki, S.Laboratoire Atmosphères, Milieux, Observations Spatiales, Service d'Aéronomie (LATMOS), CNRS, Institut Pierre Simon Laplace, Pierre et Marie Curie University, Paris, Francehttps://orcid.org/0000-0002-5538-0800
Hegglin, M. I.Department of Meteorology, University of Reading, Reading, UKhttps://orcid.org/0000-0003-2820-9044
Jöckel, PatrickDLR, IPAhttps://orcid.org/0000-0002-8964-1394
Kirner, O.Steinbuch Centre for Computing, Karlsruhe Institute of Technology, Karlsruhe, Germanyhttps://orcid.org/0000-0001-5668-6177
Liley, B.National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealandhttps://orcid.org/0000-0002-8844-7928
Marecal, V.Centre National de Recherches Météorologiques (CNRM) UMR 3589, Météo-France/CNRS, Toulouse, FranceUNSPECIFIED
Morgenstern, O.National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealandhttps://orcid.org/0000-0002-9967-9740
Stenke, A.Institute for Atmospheric and Climate Science, ETH Zürich (ETHZ), Zürich, Switzerlandhttps://orcid.org/0000-0002-5916-4013
Zeng, G.National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealandhttps://orcid.org/0000-0002-9356-5021
Abraham, N. L.Department of Chemistry, University of Cambridge, Cambridge, UKhttps://orcid.org/0000-0003-3750-3544
Archibald, A. T.Department of Chemistry, University of Cambridge, Cambridge, UKhttps://orcid.org/0000-0001-9302-4180
Butchart, N.Met Office Hadley Centre (MOHC), Exeter, UKUNSPECIFIED
Chipperfield, M. P.School of Earth and Environment, University of Leeds, Leeds, UKhttps://orcid.org/0000-0002-6803-4149
Di Genova, G.Department of Physical and Chemical Sciences, Universitá dell'Aquila, L'Aquila, ItalyUNSPECIFIED
Deushi, M.Meteorological Research Institute (MRI), Tsukuba, JapanUNSPECIFIED
Dhomse, S. S.School of Earth and Environment, University of Leeds, Leeds, UKhttps://orcid.org/0000-0003-3854-5383
Hu, R.-M.Laboratoire Atmosphères, Milieux, Observations Spatiales, Service d'Aéronomie (LATMOS), CNRS, Institut Pierre Simon Laplace, Pierre et Marie Curie University, Paris, FranceUNSPECIFIED
Kinnison, D.National Center for Atmospheric Research (NCAR), Boulder, Colorado, USAUNSPECIFIED
Kotkamp, M.National Institute of Water and Atmospheric Research (NIWA), Wellington, New ZealandUNSPECIFIED
McKenzie, R.National Institute of Water and Atmospheric Research (NIWA), Wellington, New ZealandUNSPECIFIED
Michou, M.Centre National de Recherches Météorologiques (CNRM) UMR 3589, Météo-France/CNRS, Toulouse, FranceUNSPECIFIED
O'Connor, F. M.Met Office Hadley Centre (MOHC), Exeter, UKUNSPECIFIED
Oman, L. D.National Aeronautics and Space Administration Goddard Space Flight Center (NASA GSFC), Greenbelt, Maryland, USAUNSPECIFIED
Pitari, G.Department of Physical and Chemical Sciences, Universitá dell'Aquila, L'Aquila, ItalyUNSPECIFIED
Plummer, D. A.Environment and Climate Change Canada, Montréal, CanadaUNSPECIFIED
Pyle, J. A.Department of Chemistry, University of Cambridge, Cambridge, UKhttps://orcid.org/0000-0003-3629-9916
Rozanov, E.Institute for Atmospheric and Climate Science, ETH Zürich (ETHZ), Zürich, SwitzerlandUNSPECIFIED
Saint-Martin, D.Centre National de Recherches Météorologiques (CNRM) UMR 3589, Météo-France/CNRS, Toulouse, Francehttps://orcid.org/0000-0002-8478-6914
Sudo, K.Graduate School of Environmental Studies, Nagoya University, Nagoya, Japanhttps://orcid.org/0000-0002-5013-4168
Tanaka, T. Y.Meteorological Research Institute (MRI), Tsukuba, Japanhttps://orcid.org/0000-0003-0600-2122
Visioni, D.Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USAhttps://orcid.org/0000-0002-7342-2189
Yoshida, K.Meteorological Research Institute (MRI), Tsukuba, Japanhttps://orcid.org/0000-0002-2422-5584
Date:12 August 2019
Journal or Publication Title:Atmospheric Chemistry and Physics (ACP)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:19
DOI :10.5194/acp-19-10087-2019
Page Range:pp. 10087-10110
Publisher:Copernicus Publications
ISSN:1680-7316
Status:Published
Keywords:ultraviolot radiation, clear-sky, CCMI, EMAC, MESSy, ozone, chemistry-climate modelling
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung, R - Project Climatic relevance of atmospheric tracer gases, aerosols and clouds
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Jöckel, Dr. Patrick
Deposited On:13 Aug 2019 08:42
Last Modified:13 Aug 2019 08:42

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