Please use this identifier to cite or link to this item: https://oar.tib.eu/jspui/handle/123456789/453
Full metadata record
DC FieldValueLanguage
dc.rights.licenseCC BY 3.0 Unportedger
dc.contributor.authorDuplissy, J.
dc.contributor.authorEnghoff, M. B.
dc.contributor.authorAplin, K. L.
dc.contributor.authorArnold, F.
dc.contributor.authorAufmhoff, H.
dc.contributor.authorAvngaard, M.
dc.contributor.authorBaltensperger, U.
dc.contributor.authorBondo, T.
dc.contributor.authorBingham, R.
dc.contributor.authorCarslaw, K.
dc.contributor.authorCurtius, J.
dc.contributor.authorDavid, A.
dc.contributor.authorFastrup, B.
dc.contributor.authorGagné, S.
dc.contributor.authorHahn, F.
dc.contributor.authorHarrison, R. G.
dc.contributor.authorKellett, B.
dc.contributor.authorKirkby, J.
dc.contributor.authorKulmala, M.
dc.contributor.authorLaakso, L.
dc.contributor.authorLaaksonen, A.
dc.contributor.authorLillestol, E.
dc.contributor.authorLockwood, M.
dc.contributor.authorMäkelä, J.
dc.contributor.authorMakhmutov, V.
dc.contributor.authorMarsh, N. D.
dc.contributor.authorNieminen, T.
dc.contributor.authorOnnela, A.
dc.contributor.authorPedersen, E.
dc.contributor.authorPedersen, J. O. P.
dc.contributor.authorPolny, J.
dc.contributor.authorReichl, U.
dc.contributor.authorSeinfeld, J. H.
dc.contributor.authorSipilä, M.
dc.contributor.authorStozhkov, Y.
dc.contributor.authorStratmann, F.
dc.contributor.authorSvensmark, H.
dc.contributor.authorSvensmark, J.
dc.contributor.authorVeenhof, R.
dc.contributor.authorVerheggen, B.
dc.contributor.authorViisanen, Y.
dc.contributor.authorWagner, P. E.
dc.contributor.authorWehrle, G.
dc.contributor.authorWeingartner, E.
dc.contributor.authorWex, H.
dc.contributor.authorWilhelmsson, M.
dc.contributor.authorWinkler, P. M.
dc.date.accessioned2017-11-08T18:30:43Z
dc.date.available2019-06-26T17:17:43Z
dc.date.issued2010
dc.identifier.urihttps://oar.tib.eu/jspui/handle/123456789/453
dc.identifier.urihttp://dx.doi.org/10.34657/1209-
dc.description.abstractDuring a 4-week run in October–November 2006, a pilot experiment was performed at the CERN Proton Synchrotron in preparation for the Cosmics Leaving OUtdoor Droplets (CLOUD) experiment, whose aim is to study the possible influence of cosmic rays on clouds. The purpose of the pilot experiment was firstly to carry out exploratory measurements of the effect of ionising particle radiation on aerosol formation from trace H2SO4 vapour and secondly to provide technical input for the CLOUD design. A total of 44 nucleation bursts were produced and recorded, with formation rates of particles above the 3 nm detection threshold of between 0.1 and 100 cm−3s−1, and growth rates between 2 and 37 nm h−1. The corresponding H2O concentrations were typically around 106 cm−3 or less. The experimentally-measured formation rates and \htwosofour concentrations are comparable to those found in the atmosphere, supporting the idea that sulphuric acid is involved in the nucleation of atmospheric aerosols. However, sulphuric acid alone is not able to explain the observed rapid growth rates, which suggests the presence of additional trace vapours in the aerosol chamber, whose identity is unknown. By analysing the charged fraction, a few of the aerosol bursts appear to have a contribution from ion-induced nucleation and ion-ion recombination to form neutral clusters. Some indications were also found for the accelerator beam timing and intensity to influence the aerosol particle formation rate at the highest experimental SO2 concentrations of 6 ppb, although none was found at lower concentrations. Overall, the exploratory measurements provide suggestive evidence for ion-induced nucleation or ion-ion recombination as sources of aerosol particles. However in order to quantify the conditions under which ion processes become significant, improvements are needed in controlling the experimental variables and in the reproducibility of the experiments. Finally, concerning technical aspects, the most important lessons for the CLOUD design include the stringent requirement of internal cleanliness of the aerosol chamber, as well as maintenance of extremely stable temperatures (variations below 0.1 °C
dc.formatapplication/pdf
dc.languageeng
dc.publisherMünchen : European Geopyhsical Union
dc.relation.ispartofseriesAtmospheric Chemistry and Physics, Volume 10, Issue 4, Page 1635-1647-
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/ger
dc.subjectaerosol formation
dc.subjectcloud droplet
dc.subjectcloud microphysics
dc.subjectcloud radiative forcing
dc.subjectconcentration (composition)
dc.subjectexperimental study
dc.subjectgrowth rate
dc.subjectionization
dc.subjectnucleation
dc.subjectparticle size
dc.subjectsulfuric acid
dc.subjectthreshold
dc.subject.ddc550
dc.titleResults from the CERN pilot CLOUD experiment
dc.typearticle-
dc.typeText-
dc.description.versionpublishedVersioneng
local.accessRightsopenAccess-
wgl.contributorTROPOSger
wgl.subjectGeowissenschaftenger
wgl.typeZeitschriftenartikelger
dc.relation.doihttps://doi.org/10.5194/acp-10-1635-2010
dcterms.bibliographicCitation.journalTitleAtmospheric Chemistry and Physics-
local.identifier.doihttp://dx.doi.org/10.34657/1209-
Appears in Collections:Geowissenschaften

Files in This Item:
File SizeFormat 
acp-10-1635-2010.pdf3.84 MBAdobe PDFView/Open


This item is licensed under a Creative Commons License Creative Commons