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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, more
Peer reviewed article  

Available in  Authors 
    VLIZ: Open Repository 100395 [ OMA ]

Keywords
    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
    Marine/Coastal

Authors  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., more
  • Gasparovic, R.F.
  • Brooks, I.

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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