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
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| 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.
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- Russell, L.M.
- Flagan, R.C.
- Seinfeld, J.H.
- O'Dowd, C.D.
- Smith, M.H.
- Durkee, P.A.
- Nielsen, K.
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- Hudson, J.G.
- Pockalny, R.A.
- De Bock, L.
- Van Grieken, R.E., more
- 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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