A Technique to Specify Liquid Water Content at a Point in the Atmosphere.

摘要

The liquid water content (LWC) in clouds in a three dimensional reference system is an important input parameter for operational forecast models and for design problems of systems that operate in the atmosphere. The LWC can be calculated from the cloud's drop-size distribution. An accurate estimate of LWC/DSD depends upon knowing the cloud type,air mass type,ambient temperature,cloud age,geographical locations,degree of saturation,and the general meteorological condition. Estimates of these parameters can be obtained from the global cloud analysis and the 10-level synoptic parameter analysis data bases which are produced by the Air-Force Global Weather Central. A percentage of the maximum LWC possible for precipitating and non-precipitating clouds in a layer times the percentage of cloud coverage yields the LWC for that volume.