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dc.contributor.authorMueller, D.
dc.contributor.authorAnsmann, A.
dc.contributor.authorWagner, F.
dc.contributor.authorFranke, K.
dc.contributor.authorAlthausen, D.
dc.date.accessioned2013-10-01T14:45:16Z
dc.date.available2013-10-01T14:45:16Z
dc.date.issued2002-08
dc.identifier.citationMueller , D , Ansmann , A , Wagner , F , Franke , K & Althausen , D 2002 , ' European pollution outbreaks during ACE 2 : Microphysical particle properties and single-scattering albedo inferred from multiwavelength lidar observations ' , Journal of Geophysical Research: Atmospheres , vol. 107 , no. D15 , 4248 , pp. AAC 3.1- AAC 3.11 . https://doi.org/10.1029/2001JD001110
dc.identifier.issn0747-7309
dc.identifier.otherPURE: 1982205
dc.identifier.otherPURE UUID: eafd853c-3a50-4e73-9b0b-2775ffb71588
dc.identifier.otherWOS: 000178977400023
dc.identifier.otherScopus: 32244445377
dc.identifier.urihttp://hdl.handle.net/2299/11703
dc.description.abstractWe present vertically resolved physical particle properties and the single-scattering albedo at 532 nm of pollution plumes advected from the European continent out over the Atlantic Ocean. The parameters follow from the inversion of optical data, which were obtained from six-wavelength aerosol lidar observations near Sagres (37degreesN, 9degreesW), Portugal, in the framework of Aerosol Characterization Experiment 2 (ACE 2) (June-July 1997). Particle effective radii were 0.15 +/- 0.06 m m, volume concentrations ranged from 6 to 27 mum(3) cm(-3), and surface area concentrations were 80 to 1200 mum(2) cm(-3). The particles in general showed negligible absorption, with the mean imaginary part of the wavelength-independent complex refractive index being at 0.009i +/- 0.010i. The mean real part was 1.56 +/- 0.07. A mean value of 0.95 +/- 0.06 was obtained for the single-scattering albedo at 532 nm. The numbers indicate that the major contributor to the observed pollution was nonabsorbing ammonium-sulfate-like material. A very small fraction was contributed by absorbing sootlike material. Correlation analysis showed that effective radius was well correlated with the Angstrom exponents of the underlying extinction spectra. Furthermore, correlations of the single-scattering albedo with the particle extinction-to-backscatter ratio and with the imaginary part of the complex refractive index were found. This result shows that the first two parameters contain information about the chemical state of the observed particles.en
dc.format.extent11
dc.language.isoeng
dc.relation.ispartofJournal of Geophysical Research: Atmospheres
dc.subjectinversion
dc.subjectREFRACTIVE-INDEX
dc.subjectACE 2
dc.subjectIN-SITU
dc.subjectEXTINCTION
dc.subjectEuropean pollution
dc.subjectGENERALIZED CROSS-VALIDATION
dc.subjectsingle-scattering albedo
dc.subjectREGULARIZATION
dc.subjectTROPICAL INDIAN-OCEAN
dc.subjectOPTICAL-PROPERTIES
dc.subjectCARBONACEOUS AEROSOLS
dc.subjectlidar
dc.subjectmicrophysical particle properties
dc.subjectCOMPLEX INDEX
dc.subjectSCAR-B
dc.titleEuropean pollution outbreaks during ACE 2 : Microphysical particle properties and single-scattering albedo inferred from multiwavelength lidar observationsen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Atmospheric and Climate Physics Research
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dcterms.dateAccepted2002-08
rioxxterms.versionofrecordhttps://doi.org/10.1029/2001JD001110
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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