The relationship between the optical absorption coefficient, σa, and the fog liquid water content, W, has been examined at thirteen IR wavelengths from 5 to 30 µm, on the basis of 239 experimental fog droplet size spectra selected from the literature. The results show that the correlation coefficients R between σ and W lie in the intervals 0.996-0.968, 0996-0971, 0.997-0.946 and 0.995-0.931 for valley, advection, radiation fog and for all the tog types together, with maxima at λ = 5, 9, 10 µm and the minimum at λ = 14/µm. The behaviour of R with λ and with the fog type is discussed, while reference is made to the use of the results in fog models.
Absorption and liquid water content relationship in fog, at thirteen IR wavelengths
CORRADINI, Corrado;
1981
Abstract
The relationship between the optical absorption coefficient, σa, and the fog liquid water content, W, has been examined at thirteen IR wavelengths from 5 to 30 µm, on the basis of 239 experimental fog droplet size spectra selected from the literature. The results show that the correlation coefficients R between σ and W lie in the intervals 0.996-0.968, 0996-0971, 0.997-0.946 and 0.995-0.931 for valley, advection, radiation fog and for all the tog types together, with maxima at λ = 5, 9, 10 µm and the minimum at λ = 14/µm. The behaviour of R with λ and with the fog type is discussed, while reference is made to the use of the results in fog models.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
