Show simple item record

dc.contributor.authorMueller, D.
dc.contributor.authorMattis, I.
dc.contributor.authorAnsmann, A.
dc.contributor.authorWehner, B.
dc.contributor.authorAlthausen, D.
dc.contributor.authorWandinger, U.
dc.contributor.authorDubovik, O.
dc.identifier.citationMueller , D , Mattis , I , Ansmann , A , Wehner , B , Althausen , D , Wandinger , U & Dubovik , O 2004 , ' Closure study on optical and microphysical properties of a mixed urban and Arctic haze air mass observed with Raman lidar and Sun photometer ' , Journal of Geophysical Research: Atmospheres , vol. 109 , no. D13 , D13206 .
dc.identifier.otherPURE: 1981226
dc.identifier.otherPURE UUID: 63c8dfee-12eb-4618-8456-f45751600dd9
dc.identifier.otherWOS: 000222797600002
dc.identifier.otherScopus: 4844225609
dc.identifier.otherORCID: /0000-0002-0203-7654/work/68611650
dc.description.abstract[1] We present a comprehensive optical and microphysical characterization of an intense haze event observed over Leipzig ( 51.3 degreesN, 12.4 degreesE), Germany, in April 2002. This event was characterized by unusually high optical depths. The haze consisted of a mixture of urban and Arctic haze aerosols which were advected from the Arctic regions across eastern Europe and Scandinavia. For the first time a closure study on such an event could be carried out on the basis of combined observations with Raman lidar and Sun photometer. This study also served as a performance test of the inversion algorithms that are used for retrieving microphysical particle properties from the optical data sets. A comparison of parameters derived in this study to respective quantities determined in the Arctic regions showed that Arctic-haze-like material dominated the optical and microphysical particle properties, although a significant amount of this haze must have consisted of urban aerosols. The urban aerosols from eastern Europe had properties rather similar to those characteristic for the well-aged particles of Arctic haze. The major part of the haze was confined to heights below 3 km. Optical depth was 0.4 - 0.5 at 532 nm on 8 April 2002. The particle backscatter-to-extinction ( lidar) ratio varied between 35 and 75 sr at 355 and 532 nm. The Angstrom exponent of particle extinction in the wavelength range from 355 to 532 nm was 1.8 - 2.8. The inversion of the lidar optical data resulted in particle effective radii around 0.19 +/- 0.04 mum, volume concentrations of 16 - 33 mum(3) cm(-3), surface area concentrations of 270 - 510 mum(2) cm(-3), and a single-scattering albedo around 0.97 +/- 0.06 at 532 nm. Particle size distributions showed a rather pronounced monomodal structure in the accumulation mode, which is characteristic for well-aged particles. The particle properties derived from the two instruments agreed well for intensive parameters, i.e., Angstrom exponents, lidar ratio, effective radius, and single-scattering albedo. Extensive parameters, i.e., total particle surface area and particle volume concentration, showed similar values.en
dc.relation.ispartofJournal of Geophysical Research: Atmospheres
dc.subjectSun photometer
dc.subjectparticle properties
dc.subjectArctic haze
dc.subjectRaman lidar
dc.subjectALERT CANADA
dc.subjectAPRIL 1986
dc.subjecturban pollution
dc.subjectSAHARAN DUST
dc.titleClosure study on optical and microphysical properties of a mixed urban and Arctic haze air mass observed with Raman lidar and Sun photometeren
dc.contributor.institutionCentre for Atmospheric and Climate Physics Research
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.contributor.institutionDepartment of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
rioxxterms.typeJournal Article/Review

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record