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The modification of light flux leaving a wind-roughened, oil covered sea surface: example of computations for hallow seas

100%

Otremba Z., Piskozub P. J., Piskozub J.

2000

vol. 29

issue 1

117-133

This paper presents chosen results of modelling of upward light flux over a rough sea surface covered with an oil film. In upward irradiance computations (by means of Monte Carlo method), the optical parameters of two types of water were taken into consideration: water typical for bays of the Baltic Sea (Case 2 water) and ocean (Case 1) waters, both covered with an oil layer 5 mum thick (Romashkino). Coefficients of reflectance and transmission for the oil film were used for the calculations. These coefficients were obtained through the mathematical simulation of the route of light rays, both upward and downward, through the oil film. The obtained results show that oil films influence upward light fluxes over the sea surface, and that this influence depends on the depth and roughness of the sea. The analyses of oil film visibility on sea surfaces revealed also the influence of the direction of observation.

Lidar-based investigations of optical extinction in the marine boundary layer over the coastal area

64%

Zielinski T., Piskozub P. J., Piskozub J., Drozdowska D. V., Drozdowska V., Irczuk I. M., Irczuk M., Zielinski Z. M., Zielinski M.

2000

vol. 29

issue 3

35-42

This paper presents the results of research, begun in 1992, into the determination of aerosol dynamics in the marine boundary layer under various hydrometeorological conditions by means of the lidar method. By employing several wavelengths the lidar-obtained optical extinction provides very accurate information about the size distribution of aerosols as well as their concentrations under various weather conditions and at different altitudes above the sea surface. It was demonstrated that in the marine boundary layer over the breaker zones of the southern Baltic Sea optical extinction depends on the method of calculation and wind direction as well as altitude above the sea surface. The results provided valuable inputs for investigations of the physical processes involved, as well as an important data set to use for the development of modelling of aerosol types and their dynamics in the coastal areas of the southern Baltic Sea.

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2 Oceanological Studies

2 2000

2 Piskozub J.

2 Piskozub P. J.

1 Drozdowska D. V.

1 Drozdowska V.

1 Irczuk I. M.

1 Irczuk M.

1 Otremba Z.

1 Zielinski M.

1 Zielinski T.

1 Zielinski Z. M.

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The modification of light flux leaving a wind-roughened, oil covered sea surface: example of computations for hallow seas

Lidar-based investigations of optical extinction in the marine boundary layer over the coastal area