Abstract
Abstract. 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 the
radar differential reflectivity (Zdr) to reduce the effects of ice
crystal shape and orientation on the variation in IWC – specific
differential phase (Kdp) joint distribution. A theoretical study
indicates that the proposed method, which does not require a knowledge of
the particle size distribution (PSD) and number density of ice crystals, is
suitable for high-ice-water-content (HIWC) regions in tropical convective
clouds. 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 the
estimation bias by 35 % and increases the correlation by 4 % on
average, compared to the method using specific differential phase (Kdp)
alone.
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