In this study, Global Precipitation Measurement (GPM) mission Dual-Frequency Precipitation Radar’s (DPR’s) precipitation estimates are validated with long-term (2014-2022) measurements of seven Joss–Waldvogel disdrometers installed in north Taiwan. The results show that the GPM DPR shown greater performance when predicting the rain parameters in stratiform precipitation as opposed to convective precipitation. Furthermore, regardless of single and dual-frequency algorithm, the mass-weighted mean diameter had better agreement than the normalized intercept parameter.
Microphysical characteristics of summer season rainfall over four (north, south, central and east) regions of Taiwan are investigated using GPM DPR parameters. Analysis of GPM DPR data products for summer season rainfall over Taiwan using contoured frequency by altitude diagrams (CFADs) of radar reflectivity, rainfall rate, mass-weighted mean diameter, and concentration clearly demonstrated the dominance of large-size super-cooled liquid and ice particles above the melting layer and rain particles below the melting layers in the south and central Taiwan. Moreover, coalescence and breakup processes dominate summer monsoon rainfall over Taiwan, regardless of precipitation type and geographic location.
Raindrop size distribution (RSD) characteristic variations between two southern Indian stations [Gadanki (13.5° N, 79.2° E) Kadapa (14.47° N, 78.82° E)] using ground based parsivel disdrometer data are studied. Number concentration of mid and large drops is more over Gadanki when compared to Kadapa precipitation. The mean value of mass weighted mean diameter (Dm) is higher in Gadanki than Kadapa precipitation. Both monthly and diurnal variations of Dm show higher values of Dm over Gadanki than Kadapa. After classifying the precipitations systems into stratiform and convective, Gadanki has higher (lower) Dm than Kadapa in stratiform (convective).
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