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dc.contributor.author
Muthers, Stefan
dc.contributor.author
Arfeuille, Florian
dc.contributor.author
Raible, Christoph C.
dc.contributor.author
Rozanov, Eugene
dc.date.accessioned
2018-09-27T12:42:50Z
dc.date.available
2017-06-11T20:24:18Z
dc.date.available
2018-09-27T12:42:50Z
dc.date.issued
2015
dc.identifier.issn
1680-7324
dc.identifier.issn
1680-7375
dc.identifier.other
10.5194/acp-15-11461-2015
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/106007
dc.identifier.doi
10.3929/ethz-b-000106007
dc.description.abstract
After major volcanic eruptions the enhanced aerosol causes ozone changes due to greater heterogeneous chemistry on the particle surfaces (HET-AER) and from dynamical effects related to the radiative heating of the lower stratosphere (RAD-DYN). We carry out a series of experiments with an atmosphere–ocean–chemistry–climate model to assess how these two processes change stratospheric ozone and Northern Hemispheric (NH) polar vortex dynamics. Ensemble simulations are performed under present day and preindustrial conditions, and with aerosol forcings representative of different eruption strength, to investigate changes in the response behaviour. We show that the halogen component of the HET-AER effect dominates under present-day conditions with a global reduction of ozone (−21 DU for the strongest eruption) particularly at high latitudes, whereas the HET-AER effect increases stratospheric ozone due to N2O5 hydrolysis in a preindustrial atmosphere (maximum anomalies +4 DU). The halogen-induced ozone changes in the present-day atmosphere offset part of the strengthening of the NH polar vortex during mid-winter (reduction of up to −16 m s-1 in January) and slightly amplify the dynamical changes in the polar stratosphere in late winter (+11 m s-1 in March). The RAD-DYN mechanism leads to positive column ozone anomalies which are reduced in a present-day atmosphere by amplified polar ozone depletion (maximum anomalies +12 and +18 DU for present day and preindustrial, respectively). For preindustrial conditions, the ozone response is consequently dominated by RAD-DYN processes, while under present-day conditions, HET-AER effects dominate. The dynamical response of the stratosphere is dominated by the RAD-DYN mechanism showing an intensification of the NH polar vortex in winter (up to +10 m s-1 in January). Ozone changes due to the RAD-DYN mechanism slightly reduce the response of the polar vortex after the eruption under present-day conditions.
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/3.0/
dc.title
The impacts of volcanic aerosol on stratospheric ozone and the Northern Hemisphere polar vortex: Separating radiative-dynamical changes from direct effects due to enhanced aerosol heterogeneous chemistry
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2015-10-16
ethz.journal.title
Atmospheric Chemistry and Physics
ethz.journal.volume
15
en_US
ethz.journal.issue
20
en_US
ethz.journal.abbreviated
Atmos. Chem. Phys.
ethz.pages.start
11461
en_US
ethz.pages.end
11476
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Future and Past Solar Influence on the Terrestrial Climate II
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.identifier.nebis
004294181
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 (emeritus) / Peter, Thomas (emeritus)
en_US
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 (emeritus) / Peter, Thomas (emeritus)
ethz.grant.agreementno
147659
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
SNF: Sonstige
ethz.date.deposited
2017-06-11T20:24:43Z
ethz.source
ECIT
ethz.identifier.importid
imp5936539e1ba7271755
ethz.ecitpid
pub:165955
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-13T02:55:07Z
ethz.rosetta.lastUpdated
2023-02-06T15:56:21Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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