2026-04-17T23:24:30Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/2182722025-12-05T14:46:58Zcom_2072_1057col_2072_478821col_2072_478917

00925njm 22002777a 4500 dc Peinó, Eric author Bech, Joan author Polls, Francesc author Udina Sistach, Mireia author Petracca, M. author Adirosi, E. author González-Herrero, Sergi author Boudevillain, B. author 2025-01-30T18:06:35Z 2025-01-30T18:06:35Z 2024 2025-01-30T18:06:36Z Dual-frequency precipitation radar (DPR) on the Core GPM satellite provides spaceborne three-dimensional observations of precipitation fields and surface rainfall rate with quasi-global coverage. The present study evaluates the behavior of liquid precipitation intensity, radar reflectivity factor (ZKu and ZKa) and drop size distribution (DSD) parameters (weighted mean diameter Dm and intercept parameter Nw) of the GPM DPR-derived products, version 07, from 2014 to 2023. Observations from seven Parsivel disdrometers located in different topographic zones in the Western Mediterranean are taken as ground references. Four matching techniques between satellite estimates and ground level observations were tested, and the best results were found for the so-called optimal comparison approach. Overall, GPM DPR products captured the variability of the observed DSD well at different rainfall intensities. However, overestimation of the mean Dm and underestimation of the mean Nw were observed, being much more sensitive to errors in drop diameters larger than 1.5 mm. Moreover, the lowest errors were found for radar reflectivity factor and Dm, and the highest for Nw and rainfall rate. In addition, the GPM DPR convective and stratiform classification was tested, and a substantial overestimation of stratiform cases compared to disdrometer observations were found. Mediterrània occidental Precipitacions (Meteorologia) Radar Western Mediterranean Precipitations (Meteorology) Radar Validation of GPM DPR Rainfall and Drop Size Distributions Using Disdrometer Observations in the Western Mediterranean