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Changes in submicro...
Changes in submicrometer particle distributions and light scattering during haze and fog events in a highly polluted environment
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- Yuskiewicz, Brett A. (author)
- Leibniz Institute for Tropospheric Research (TROPOS)
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- Orsini, Douglas (author)
- Leibniz Institute for Tropospheric Research (TROPOS)
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- Stratmann, Frank (author)
- Leibniz Institute for Tropospheric Research (TROPOS)
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- Wendisch, Manfred (author)
- Leibniz Institute for Tropospheric Research (TROPOS)
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- Wiedensohler, Alfred (author)
- Leibniz Institute for Tropospheric Research (TROPOS)
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- Heintzenberg, Jost (author)
- Leibniz Institute for Tropospheric Research (TROPOS)
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- Martinsson, Bengt G. (author)
- Lund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Frank, Göran (author)
- Lund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Wobrock, Wolfram (author)
- Blaise Pascal University
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- Schell, Dieter (author)
- Goethe University
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(creator_code:org_t)
- 1998
- 1998
- English 13 s.
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In: Contributions to Atmospheric Physics. - 0005-8173. ; 71:1, s. 33-45
- Related links:
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https://lup.lub.lu.s...
Abstract
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- The changes in submicrometer atmospheric particle size distributions measured with a Differential Mobility Particle Sizer (DMPS) system during a polluted fog experiment during November, 1994 are presented in this study. Results reveal three modes commonly evident in the size distribution (3 < DN < 843 nm) measurements; the ultrafine, Aitken and accumulation with respective geometric diameters, (Dgn), of 17, 110 and 400 nm. An additional mode, appears between the ultrafine and Aitken modes (Dgn = 52 nm) in approximately one quarter of the measurements and is linked to several industrial cities upwind of the measurement site. A stabile ultrafine mode appears consistently (84% of measurements) at 16-17 nm throughout the campaign, suggestive of a source, such as a highway in the near vicinity. During fog and haze periods number concentrations for particles less than 25 nm and greater than 400 nm decrease by 78 and 95%, respectively. These changes do not affect the aerosol scattering efficiency significantly. The overall aerosol mass scattering efficiency determined for the Po Valley region is 4.3 ± 0.6 m2 g-1. Closure is achieved for light extinction predicted from droplet distributions and measured with a transmissiometer in 37 of 39 cases during fog periods. Measured and calculated light extinction, bext, covary strongly with an R2 of 0.92.
Subject headings
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
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Yuskiewicz, Bret ...
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Orsini, Douglas
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Stratmann, Frank
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Wendisch, Manfre ...
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Wiedensohler, Al ...
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Heintzenberg, Jo ...
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Martinsson, Beng ...
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Frank, Göran
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Wobrock, Wolfram
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Schell, Dieter
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NATURAL SCIENCES
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Lund University