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dc.contributor.authorSchoen, Roland
dc.contributor.authorSchnaiter, Martin
dc.contributor.authorUlanowski, Zbigniew
dc.contributor.authorSchmitt, Carl
dc.contributor.authorBenz, Stefan
dc.contributor.authorMoehler, Ottmar
dc.contributor.authorVogt, Steffen
dc.contributor.authorWagner, Robert
dc.contributor.authorSchurath, Ulrich
dc.date.accessioned2013-04-12T11:44:13Z
dc.date.available2013-04-12T11:44:13Z
dc.date.issued2011-04
dc.identifier.citationSchoen , R , Schnaiter , M , Ulanowski , Z , Schmitt , C , Benz , S , Moehler , O , Vogt , S , Wagner , R & Schurath , U 2011 , ' Particle habit imaging using incoherent light : a first step toward a novel instrument for cloud microphysics ' , Journal of Atmospheric and Oceanic Technology , vol. 28 , no. 4 , pp. 493-512 . https://doi.org/10.1175/2011JTECHA1445.1
dc.identifier.issn0739-0572
dc.identifier.otherPURE: 356908
dc.identifier.otherPURE UUID: 416cd91a-4082-461f-b0c4-854f3e400efa
dc.identifier.otherWOS: 000290057600004
dc.identifier.otherScopus: 79958714127
dc.identifier.urihttp://hdl.handle.net/2299/10394
dc.descriptionOriginal article can be found at: http://journals.ametsoc.org/ Copyright American Meteorological Society
dc.description.abstractThe imaging unit of the novel cloud particle instrument Particle Habit Imaging and Polar Scattering (PHIPS) probe has been developed to image individual ice particles produced inside a large cloud chamber. The PHIPS produces images of single airborne ice crystals, illuminated with white light of an ultrafast flash-lamp, which are captured at a maximum frequency of similar to 5 Hz by a charge-coupled device (CCD) camera with microscope optics. The imaging properties of the instrument were characterized by means of crystalline sodium hexafluorosilicate ice analogs, which are stable at room temperature. The optical resolving power of the system is similar to 2 mu m. By using dedicated algorithms for image processing and analysis, the ice crystal images can be analyzed automatically in terms of size and selected shape parameters. PHIPS has been operated at the cloud simulation chamber facility Aerosol Interaction and Dynamics in the Atmosphere (AIDA) of the Karlsruhe Institute of Technology at different temperatures between -17 degrees and -4 degrees C in order to study the influence of the ambient conditions, that is, temperature and ice saturation ratio, on ice crystal habits. The area-equivalent size distributions deduced from the PHIPS images are compared with the retrieval results from Fourier transform infrared (FTIR) extinction spectroscopy in case of small (<20 mu m) and with single particle data from the cloud particle imager in case of larger (>20 mu m) ice particles. Good agreement is found for both particle size regimesen
dc.language.isoeng
dc.relation.ispartofJournal of Atmospheric and Oceanic Technology
dc.rights/dk/atira/pure/core/openaccesspermission/open
dc.subjectice nucleation
dc.subjectcrystal shape
dc.subjectsnow crystals
dc.subjectchamber aida
dc.subjectcirrus
dc.subjectscattering
dc.subjectanalogs
dc.subjectaerosol
dc.subjectgrowth
dc.subjectdust
dc.titleParticle habit imaging using incoherent light : a first step toward a novel instrument for cloud microphysicsen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionLight Scattering & Radiactive Properties
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Published version
rioxxterms.versionVoR
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1175/2011JTECHA1445.1
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeopenAccess


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