Closure study on optical and microphysical properties of a mixed urban and Arctic haze air mass observed with Raman lidar and Sun photometer
[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 ae...
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ftunivhertford:oai:uhra.herts.ac.uk:2299/11276 2024-06-02T07:54:32+00:00 Closure study on optical and microphysical properties of a mixed urban and Arctic haze air mass observed with Raman lidar and Sun photometer Mueller, D. Mattis, I. Ansmann, A. Wehner, B. Althausen, D. Wandinger, U. Dubovik, O. Centre for Atmospheric and Climate Physics Research School of Physics, Engineering & Computer Science Department of Physics, Astronomy and Mathematics 2004-07 10 http://hdl.handle.net/2299/11276 eng eng Journal of Geophysical Research: Atmospheres Mueller , 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 . https://doi.org/10.1029/2003JD004200 2169-897X ORCID: /0000-0002-0203-7654/work/68611650 http://hdl.handle.net/2299/11276 TO-BACKSCATTER RATIO Sun photometer particle properties TROPOSPHERIC AEROSOL Arctic haze CENTRAL-EUROPE Raman lidar ALERT CANADA SIZE DISTRIBUTIONS APRIL 1986 urban pollution SKY RADIANCE MEASUREMENTS SAHARAN DUST PARTICLE PARAMETERS VERTICAL PROFILES 2004 ftunivhertford 2024-05-07T23:38:06Z [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 ... Other/Unknown Material albedo Arctic Arctic University of Hertfordshire: UH Research Archive Arctic Canada Journal of Geophysical Research: Atmospheres 109 D13 n/a n/a |
institution |
Open Polar |
collection |
University of Hertfordshire: UH Research Archive |
op_collection_id |
ftunivhertford |
language |
English |
topic |
TO-BACKSCATTER RATIO Sun photometer particle properties TROPOSPHERIC AEROSOL Arctic haze CENTRAL-EUROPE Raman lidar ALERT CANADA SIZE DISTRIBUTIONS APRIL 1986 urban pollution SKY RADIANCE MEASUREMENTS SAHARAN DUST PARTICLE PARAMETERS VERTICAL PROFILES |
spellingShingle |
TO-BACKSCATTER RATIO Sun photometer particle properties TROPOSPHERIC AEROSOL Arctic haze CENTRAL-EUROPE Raman lidar ALERT CANADA SIZE DISTRIBUTIONS APRIL 1986 urban pollution SKY RADIANCE MEASUREMENTS SAHARAN DUST PARTICLE PARAMETERS VERTICAL PROFILES Mueller, D. Mattis, I. Ansmann, A. Wehner, B. Althausen, D. Wandinger, U. Dubovik, O. Closure study on optical and microphysical properties of a mixed urban and Arctic haze air mass observed with Raman lidar and Sun photometer |
topic_facet |
TO-BACKSCATTER RATIO Sun photometer particle properties TROPOSPHERIC AEROSOL Arctic haze CENTRAL-EUROPE Raman lidar ALERT CANADA SIZE DISTRIBUTIONS APRIL 1986 urban pollution SKY RADIANCE MEASUREMENTS SAHARAN DUST PARTICLE PARAMETERS VERTICAL PROFILES |
description |
[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 ... |
author2 |
Centre for Atmospheric and Climate Physics Research School of Physics, Engineering & Computer Science Department of Physics, Astronomy and Mathematics |
author |
Mueller, D. Mattis, I. Ansmann, A. Wehner, B. Althausen, D. Wandinger, U. Dubovik, O. |
author_facet |
Mueller, D. Mattis, I. Ansmann, A. Wehner, B. Althausen, D. Wandinger, U. Dubovik, O. |
author_sort |
Mueller, D. |
title |
Closure study on optical and microphysical properties of a mixed urban and Arctic haze air mass observed with Raman lidar and Sun photometer |
title_short |
Closure study on optical and microphysical properties of a mixed urban and Arctic haze air mass observed with Raman lidar and Sun photometer |
title_full |
Closure study on optical and microphysical properties of a mixed urban and Arctic haze air mass observed with Raman lidar and Sun photometer |
title_fullStr |
Closure study on optical and microphysical properties of a mixed urban and Arctic haze air mass observed with Raman lidar and Sun photometer |
title_full_unstemmed |
Closure study on optical and microphysical properties of a mixed urban and Arctic haze air mass observed with Raman lidar and Sun photometer |
title_sort |
closure study on optical and microphysical properties of a mixed urban and arctic haze air mass observed with raman lidar and sun photometer |
publishDate |
2004 |
url |
http://hdl.handle.net/2299/11276 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
albedo Arctic Arctic |
genre_facet |
albedo Arctic Arctic |
op_relation |
Journal of Geophysical Research: Atmospheres Mueller , 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 . https://doi.org/10.1029/2003JD004200 2169-897X ORCID: /0000-0002-0203-7654/work/68611650 http://hdl.handle.net/2299/11276 |
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Journal of Geophysical Research: Atmospheres |
container_volume |
109 |
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D13 |
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1800740931051192320 |