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. This paper presents a methodology for ice water content(IWC) retrieval from a dual-polarization side-looking X-band airborne radar.Measured IWC from aircraft in situ probes is weighted by a function of theradar differential reflectivity (Zdr) to reduce the effects of icecrystal shape and orientation on the variation in IWC – specificdifferential phase (Kdp) joint distribution. A theoretical studyindicates that the proposed method, which does not require a knowledge ofthe particle size distribution (PSD) and number density of ice crystals, issuitable for high-ice-water-content (HIWC) regions in tropical convectiveclouds. Using datasets collected during the High Altitude Ice Crystals –High Ice Water Content (HAIC-HIWC) international field campaign in Cayenne,French Guiana (2015), it is shown that the proposed method improves theestimation bias by 35 % and increases the correlation by 4 % onaverage, compared to the method using specific differential phase (Kdp)alone.

Determination of ice water content (IWC) in tropical convective clouds from X-band dual-polarization airborne radar