Accession Number : ADA273810


Title :   Implications of the Khrgian-Mazin Distribution Function for Water Clouds and Distribution Consistencies With Aerosols and Rain


Descriptive Note : Technical rept. 1970-1991,


Corporate Author : PHILLIPS LAB HANSCOM AFB MA


Personal Author(s) : Plank, Vernon G


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a273810.pdf


Report Date : 06 Dec 1991


Pagination or Media Count : 203


Abstract : Applications of the Khrgian-Mazin (KM) distribution function for water clouds are discussed. The equations for the number concentration, cross- sectional area, visibility, liquid water content, and the radar/lidar reflectivity factor of water droplets are presented and modified by an assumption stemming from visibility considerations. Visibility is considered at some length and visibility theory is extended into arenas of 'recognition visibility' and 'discernment visibility' in both clear-air and cloudy circumstances. Radar/lidar distribution equations are presented that specify the detectability of clouds, in general and for natural cloud types, as a function of radar wavelength. A so-called 'M vs Z' relation is also presented that is undoubtedly the first to be developed for water clouds. Truncation effects, primarily involving instruments that do not detect the full size extent of particle distributions, are illustrated. Relations among cloud physics quantities that are solidly tied mathematically to the KM distribution function (twenty in number) are summarized. Composite distribution equations for aerosols plus clouds plus rain, or any combination, are described with examples of their utility. It is concluded that the KM function for water clouds is highly versatile and useful and that the composite equations are realistic and informative.


Descriptors :   *CLOUDS , *AEROSOLS , *DISTRIBUTION FUNCTIONS , *RAIN , AIR , LIQUIDS , PHYSICS , VISIBILITY , TRUNCATION , STEMMING , CLOUD PHYSICS , REFLECTIVITY , LENGTH , QUANTITY , WATER , RADAR , PARTICLES


Subject Categories : Meteorology
      Statistics and Probability


Distribution Statement : APPROVED FOR PUBLIC RELEASE