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A case study of ships forming and not forming tracks in moderately polluted clouds Noone, K.J.; Öström, E.; Ferek, R.J.; Garrett, T.; Hobbs, P.V.; Johnson, D.W.; Taylor, J.P.; Russell, L.M.; Flagan, R.C.; Seinfeld, J.H.; O'Dowd, C.D.; Smith, M.H.; Durkee, P.A.; Nielsen, K.; Hudson, J.G.; Pockalny, R.A.; De Bock, L.; Van Grieken, R.E.; Gasparovic, R.F.; Brooks, I. (2000). A case study of ships forming and not forming tracks in moderately polluted clouds. J. Atmos. Sci. 57: 2729-2747 In: Journal of the atmospheric sciences. American Meteorological Society: Boston, etc.. ISSN 0022-4928; e-ISSN 1520-0469, meer

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 100395 [ download pdf ]

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Trefwoorden

Albedo Colloids > Aerosols Energy transfer > Radiative transfer Environmental factors > Anthropogenic factors Fuels Hydrometeors > Clouds Hydrometeors > Droplets Layers > Boundary layers > Atmospheric boundary layer Motion > Fluid motion > Fluid flow > Plumes > Chemical plumes Ocean-atmosphere system Particulates > Atmospheric particulates Physics > Atmospheric sciences > Atmospheric physics > Cloud physics Pollution > Air pollution Pollution effects Population characteristics > Population structure > Size distribution Vehicles > Surface craft > Ships Marien/Kust

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Auteurs		Top
Noone, K.J. Öström, E. Ferek, R.J. Garrett, T. Hobbs, P.V. Johnson, D.W. Taylor, J.P.	Russell, L.M. Flagan, R.C. Seinfeld, J.H. O'Dowd, C.D. Smith, M.H. Durkee, P.A. Nielsen, K.	Hudson, J.G. Pockalny, R.A. De Bock, L. Van Grieken, R.E., meer Gasparovic, R.F. Brooks, I.

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Abstract

The effects of anthropogenic particulate emissions from ships on the radiative, microphysical, and chemical properties of m(oderately polluted marine stratiform clouds are examined. A case study of two ships in the same air mass is presented where one of the vessels caused a discernible ship track while the other did not. In situ measurements of cloud droplet size distributions, liquid water content, and cloud radiative properties, as well as aerosol size distributions (outside cloud, interstitial, and cloud droplet residual particles) and aerosol chemistry, are presented. These are related to measurements of cloud radiative properties. The differences between the aerosol in the two ship plumes are discussed; these indicate that combustion-derived particles in the size range of about 0,03-0,3 µm radius were those that caused the microphysical changes in the clouds that were responsible for the ship track. The authors examine the processes behind ship track formation in a moderately polluted marine boundary layer as an example of the effects that anthropogenic particulate pollution can have in the albedo of marine stratiform clouds.

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