Multifractal comparison of the outputs of two optical disdrometers - École des Ponts ParisTech Access content directly
Journal Articles Hydrological Sciences Journal Year : 2016

Multifractal comparison of the outputs of two optical disdrometers


In this paper a universal multifractals comparison of the outputs of two types of collocated optical disdrometers installed on the roof of the Ecole des Ponts ParisTech is performed. A Campbell Scientific PWS100 which analyses the light scattered by the hydrometeors and an OTT Parsivel2 which analyses the portion of occluded light are deployed. Both devices provide a binned distribution of drops according to their size and velocity. Various fields are studied across a range of scales: rain rate (R), liquid water content (ρ), polarimetric weather radar quantities such the horizontal reflectivity (Zh) and the specific differential phase (Kdp), and drop size distribution (DSD) parameters such as the total drop concentration (Nt) and the mass-weighted diameter (Dm). For both devices, good scaling is retrieved on the whole range of available scales (2 h–30 s), except for the DSD parameters for which the scaling only holds down to few minutes. For R, the universal multifractal parameters are found to equal 1.5 and 0.2 for α and C1, respectively. Results are interpreted with the help of the classical Zh–R and R–Kdp radar relations.
Fichier principal
Vignette du fichier
Gires_et_al_HSJ_Hydrofractals_2014_R2_vf_no_track_changes.pdf (542.25 Ko) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-01707378 , version 1 (12-02-2018)



Auguste Gires, Ioulia Tchiguirinskaia, D Schertzer. Multifractal comparison of the outputs of two optical disdrometers. Hydrological Sciences Journal, 2016, 61 (9), pp.1641-1651. ⟨10.1080/02626667.2015.1055270⟩. ⟨hal-01707378⟩
98 View
202 Download



Gmail Mastodon Facebook X LinkedIn More