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dc.contributor.author
Münch, Steffen
dc.contributor.author
Curtius, Joachim
dc.date.accessioned
2017-11-24T12:09:55Z
dc.date.available
2017-10-06T02:22:39Z
dc.date.available
2017-11-24T12:09:55Z
dc.date.issued
2017-06-22
dc.identifier.issn
1680-7375
dc.identifier.issn
1680-7367
dc.identifier.other
10.5194/acp-17-7581-2017
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/190716
dc.identifier.doi
10.3929/ethz-b-000190716
dc.description.abstract
Recent analysis of long-term balloon-borne measurements of Antarctic stratospheric condensation nuclei (CN) between July and October showed the formation of a volatile CN layer at 21–27 km altitude in a background of existing particles. We use the nucleation model SAWNUC to simulate these CN in subsiding air parcels and study their nucleation and coagulation characteristics. Our simulations confirm recent analysis that the development of the CN layer can be explained with neutral sulfuric acid–water nucleation and we show that outside the CN layer the measured CN concentrations are well reproduced just considering coagulation and the subsidence of the air parcels. While ion-induced nucleation is expected as the dominating formation process at higher temperatures, it does not play a significant role during the CN layer formation as the charged clusters recombine too fast. Further, we derive sulfuric acid concentrations for the CN layer formation. Our concentrations are about 1 order of magnitude higher than previously presented concentrations as our simulations consider that nucleated clusters have to grow to CN size and can coagulate with preexisting particles. Finally, we calculate threshold sulfuric acid profiles that show which concentration of sulfuric acid is necessary for nucleation and growth to observable size. These threshold profiles should represent upper limits of the actual sulfuric acid outside the CN layer. According to our profiles, sulfuric acid concentrations seem to be below midlatitude average during Antarctic winter but above midlatitude average for the CN layer formation.
en_US
dc.language.iso
en
en_US
dc.publisher
European Geophysical Society
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
Nucleation modeling of the Antarctic stratospheric CN layer and derivation of sulfuric acid profiles
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
ethz.journal.title
Atmospheric Chemistry and Physics
ethz.journal.volume
17
en_US
ethz.journal.issue
12
en_US
ethz.journal.abbreviated
Atmos. chem. phys.
ethz.pages.start
7581
en_US
ethz.pages.end
7591
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.status
published
en_US
ethz.date.deposited
2017-10-06T02:22:43Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-11-24T12:09:59Z
ethz.rosetta.lastUpdated
2018-08-03T03:00:36Z
ethz.rosetta.versionExported
true
ethz.COinS
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