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dc.contributor.author
Oikonomakis, Emmanouil
dc.contributor.author
Aksoyoglu, Sebnem
dc.contributor.author
Wild, Martin
dc.contributor.author
Ciarelli, Giancarlo
dc.contributor.author
Baltensperger, Urs
dc.contributor.author
Prévôt, André S.H.
dc.date.accessioned
2018-07-27T14:36:04Z
dc.date.available
2018-07-27T06:57:10Z
dc.date.available
2018-07-27T14:36:04Z
dc.date.issued
2018
dc.identifier.issn
1680-7375
dc.identifier.issn
1680-7367
dc.identifier.other
10.5194/acp-18-9741-2018
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/278729
dc.identifier.doi
10.3929/ethz-b-000278729
dc.description.abstract
Surface solar radiation (SSR) observations have indicated an increasing trend in Europe since the mid-1980s, referred to as solar "brightening". In this study, we used the regional air quality model, CAMx (Comprehensive Air Quality Model with Extensions) to simulate and quantify, with various sensitivity runs (where the year 2010 served as the base case), the effects of increased radiation between 1990 and 2010 on photolysis rates (with the PHOT1, PHOT2 and PHOT3 scenarios, which represented the radiation in 1990) and biogenic volatile organic compound (BVOC) emissions (with the BIO scenario, which represented the biogenic emissions in 1990), and their consequent impacts on summer surface ozone concentrations over Europe between 1990 and 2010. The PHOT1 and PHOT2 scenarios examined the effect of doubling and tripling the anthropogenic PM2.5 concentrations, respectively, while the PHOT3 investigated the impact of an increase in just the sulfate concentrations by a factor of 3.4 (as in 1990), applied only to the calculation of photolysis rates. In the BIO scenario, we reduced the 2010 SSR by 3% (keeping plant cover and temperature the same), recalculated the biogenic emissions and repeated the base case simulations with the new biogenic emissions. The impact on photolysis rates for all three scenarios was an increase (in 2010 compared to 1990) of 3–6% which resulted in daytime (10:00–18:00 Local Mean Time – LMT) mean surface ozone differences of 0.2–0.7ppb (0.5–1.5%), with the largest hourly difference rising as high as 4–8ppb (10–16%). The effect of changes in BVOC emissions on daytime mean surface ozone was much smaller (up to 0.08ppb,  ∼ 0.2%), as isoprene and terpene (monoterpene and sesquiterpene) emissions increased only by 2.5–3 and 0.7%, respectively. Overall, the impact of the SSR changes on surface ozone was greater via the effects on photolysis rates compared to the effects on BVOC emissions, and the sensitivity test of their combined impact (the combination of PHOT3 and BIO is denoted as the COMBO scenario) showed nearly additive effects. In addition, all the sensitivity runs were repeated on a second base case with increased NOx emissions to account for any potential underestimation of modeled ozone production; the results did not change significantly in magnitude, but the spatial coverage of the effects was profoundly extended. Finally, the role of the aerosol–radiation interaction (ARI) changes in the European summer surface ozone trends was suggested to be more important when comparing to the order of magnitude of the ozone trends instead of the total ozone concentrations, indicating a potential partial damping of the effects of ozone precursor emissions' reduction.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
European Geophysical Society
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Solar "brightening" impact on summer surface ozone between 1990 and 2010 in Europe - A model sensitivity study of the influence of the aerosol-radiation interactions
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2018-07-11
ethz.journal.title
Atmospheric Chemistry and Physics
ethz.journal.volume
18
en_US
ethz.journal.issue
13
en_US
ethz.journal.abbreviated
Atmos. chem. phys.
ethz.pages.start
9741
en_US
ethz.pages.end
9765
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Munich
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::03360 - Schär, Christoph / Schär, Christoph
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::03360 - Schär, Christoph / Schär, Christoph
ethz.date.deposited
2018-07-27T06:57:26Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2018-07-27T14:36:18Z
ethz.rosetta.lastUpdated
2019-02-03T05:02:29Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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