Estimating cloud liquid water content from radar reflectivity for stratocumulus clouds during the Cloud Lidar and Radar Experiment

In order to obtain the cloud liquid water content from radar observations, a relationship between the radar reflectivity (Z) and the cloud liquid water content (LWC) must be found. In literature, empirical Z-LWC have been proposed. However these relationships ignore drizzle-sized droplets. Since the clouds were drizzling during Clare these relationships will not be valid for the Clare data set. In this report, a Z-LWC relation valid for clouds containing drizzle-sized droplets is developed based on the CLARE in-situ measurements and radar observations. The CLARE measurement campaign took place near Chilbolton (U.K.), between October 5th and October 23rd 1998.