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dc.contributor.author
Calisto, Marco
dc.contributor.author
Usoskin, Ilya
dc.contributor.author
Rozanov, Eugene
dc.contributor.author
Peter, Thomas
dc.date.accessioned
2018-10-31T10:26:55Z
dc.date.available
2017-06-09T11:43:45Z
dc.date.available
2018-10-31T10:26:55Z
dc.date.issued
2011
dc.identifier.issn
1680-7375
dc.identifier.issn
1680-7367
dc.identifier.other
10.5194/acp-11-4547-2011
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/36769
dc.identifier.doi
10.3929/ethz-b-000036769
dc.description.abstract
This study investigates the influence of the Galactic Cosmic Rays (GCRs) on the atmospheric composition, temperature and dynamics by means of the 3-D Chemistry Climate Model (CCM) SOCOL v2.0. Ionization rates were parameterized according to CRAC:CRII (Cosmic Ray induced Cascade: Application for Cosmic Ray Induced Ionization), a detailed state-of-the-art model describing the effects of GCRs in the entire altitude range of the CCM from 0–80 km. We find statistically significant effects of GCRs on tropospheric and stratospheric NOx, HOx, ozone, temperature and zonal wind, whereas NOx, HOx and ozone are annually averaged and the temperature and the zonal wind are monthly averaged. In the Southern Hemisphere, the model suggests the GCR-induced NOx increase to exceed 10 % in the tropopause region (peaking with 20 % at the pole), whereas HOx is showing a decrease of about 3 % caused by enhanced conversion into HNO3. As a consequence, ozone is increasing by up to 3 % in the relatively unpolluted southern troposphere, where its production is sensitive to additional NOx from GCRs. Conversely, in the northern polar lower stratosphere, GCRs are found to decrease O3 by up to 3 %, caused by the additional heterogeneous chlorine activation via ClONO2 + HCl following GCR-induced production of ClONO2. There is an apparent GCR-induced acceleration of the zonal wind of up to 5 m s−1 in the Northern Hemisphere below 40 km in February, and a deceleration at higher altitudes with peak values of 3 m s−1 around 70 km altitude. The model also indentifies GCR-induced changes in the surface air, with warming in the eastern part of Europe and in Russia (up to 2.25 K for March values) and cooling in Siberia and Greenland (by almost 2 K). We show that these surface temperature changes develop even when the GCR-induced ionization is taken into account only above 18 km, suggesting that the stratospherically driven strengthening of the polar night jet extends all the way down to the Earth's surface.
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
Influence of Galactic Cosmic Rays on atmospheric composition and dynamics
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2011-05-13
ethz.journal.title
Atmospheric Chemistry and Physics
ethz.journal.volume
11
en_US
ethz.journal.issue
9
en_US
ethz.journal.abbreviated
Atmos. chem. phys.
ethz.pages.start
4547
en_US
ethz.pages.end
4556
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
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 / Peter, Thomas
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 / Peter, Thomas
ethz.date.deposited
2017-06-09T11:44:06Z
ethz.source
ECIT
ethz.identifier.importid
imp59364e2cc02d235849
ethz.ecitpid
pub:58750
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-19T08:03:45Z
ethz.rosetta.lastUpdated
2021-02-15T02:20:53Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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