Observations of swell influence on ocean surface roughness

Observations of swell influence on ocean surface roughness

[1] Field measurements of the ocean surface wave spectrum focusing on the slope-contributing components are used to construct a spectral model of the ocean surface roughness. The spectral parameterization is established with the observed empirical power law relation between the dimensionless wave spectral density and wind speed. The power law parameters (proportionality coefficient and exponent...

Ocean Surface Roughness (Extended Abstract)

Influence of Surface Cooling on Extrudate Swell - a Numerical Study

Influence of convective cooling at the extrudate’s free surfaces on its own swelling behaviour is examined numerically when viscous fluids of a Newtonian type are extruded. In circular die extrusion, increasing the surface heat transfer coefficient h increases extrudate’s thickness swell at low Nahme-Griffith number Na; at high Na, however, this trend tends to be reversed. With annular dies, a ...

On the Influence of Surface Roughness on Radarsat-2 Polarimetric Observations

Radar based surface soil moisture retrieval has been subject of intense research during the last decades. However, the space-borne radar sensors available so far provided single configuration observations where the influence of surface roughness generally caused the solution of the backscattering process to be ill posed. The availability of SAR sensors with polarimetric capabilities, such as RA...

Surface roughness influence on photothermal radiometry

Surface roughness has to be taken into account for accurate interpretation of photothermal measurements. An expression for photothermal signals from rough samples was derived by combining the effect of roughness induced thermal wave dispersion with the equivalent layer model. The performance of the proposed model was successfully demonstrated by comparing calculations with radiometric measureme...