Comparison of precipitation measurements by Ott Parsivel<sup>2</sup> and Thies LPM optical disdrometers

Abstract

Abstract.Optical disdrometers are present weather sensors with the ability of providing detailed information of precipitation such as rain intensity, kinetic energy or radar reflectivity, together with discrete information on the distribution of particle sizes and fall velocities (PSVD) of the hydrometeors. Disdrometers constitute a step forward towards a more complete characterisation of precipitation, being highly useful in several research fields and applications. In this article the performance of the two optical . The results show significant differences between both disdrometer types for all integrated precipitation parameters, which can be explained by differences in the raw particle size and 10 velocity distribution (PSVD). Thies LPM recorded in average double number of particles than PARSIVEL 2 . PSVD percentile comparison showed Thies LPM measuring more small particles than Ott Parsivel 2 , resulting in higher rain rates and totals.These differences increased greatly with rainfall intensity. At rain rates above 10 mm h

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“…where, A is the disdrometer laser beam sampling area in (0.0054 m -2 ) (from Parsivel 2 manual), and w is the width of the disdrometer laser beam (0.03 m) (Angulo-Martínez et al, 2018).…”

Influence of Disdrometer Type on Weather Radar Algorithms from Measured DSD: Application to Italian Climatology

“…Ref. [36] compared P2 and TC measurements and found discrepancies between precipitation integral parameters estimated from the two devices because TC detects a much larger number of drops, in particular of small size, even with respect to P2.…”