Modeling of fog droplet size distributions from infrared light attenuation measurements

It is demonstrated that optical attenuations recorded at 1-min time interval in foggy environments can be modeled using two parameters of exponential distribution (hereafter EDSD) that are retrieved by standard iterative procedure. To compute two parameters of the exponential distribution, two experimental measurements are required (e.g. the measurement of liquid water content and the optical attenuations at visible wavelength) that are treated as two linear equations. A performance analysis suggests that the newly computed EDSD parameters having average values of Λ = 5.9815, N0 = 6.0586 are well correlated with the infrared light extinction coefficients and show somewhat better agreement with the calculated attenuations