Assessment of the Thies optical disdrometer performance

Frasson, Renato Prata de Moraes; Cunha, L.; Krajewski, Witold F.

doi:10.1016/j.atmosres.2011.02.014

Cited by 93 publications

(56 citation statements)

References 31 publications

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“…The first ones were impact disdrometers (Joss and Waldvogel 1967), and now optical ones (Loffler-Mang and Joss 2000, Ellis et al 2006, Battaglia et al 2010, Frasson et al 2011) are more commonly used for operational and research purposes. The great advantage of these devices with regards to more conventional rain gauges is that they do not measure only a rain rate (or rainfall depth) but information about size and fall velocity for all the hydrometeors passing through the sampling area whose size is few tens of cm 2 .…”

mentioning

confidence: 99%

“…Numerous experiments have been carried out to compare the rain rate output of various types of collocated disdrometers along with rain gauges (Miriovsky et al 2004, Krajewski et al 2006, Frasson et al, 2011, Thurai et al 2011. The temporal evolution (Thurai et al 2011) or spatial distribution (Jaffrain and Berne 2011) of total drop concentration (N t ) and mass-weighted diameter (D m ), which are commonly used to fully characterize drop size distribution, have also been analysed.…”

mentioning

confidence: 99%

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Multifractal comparison of the outputs of two optical disdrometers

Gires

Tchiguirinskaia

Schertzer

2016

Hydrological Sciences Journal

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confidence: 99%

mentioning

confidence: 99%

Multifractal comparison of the outputs of two optical disdrometers

Gires

Tchiguirinskaia

Schertzer

2016

Hydrological Sciences Journal

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“…Frasson et al [2011]) and a two-dimensional video disdrometer (hereafter 2DVD, made by Joanneum and characterized in Schönhuber et al [2008] and Kruger and Krajewski [2002]) has been constructed and continuously acquired data since late December 2013. The array site is located at 32 • 44 ′ 26 ′′ N, 80 • 10 ′ 36 ′′ W. The 22 detectors are constructed in a dense array with all instruments taking data within 125 m of each other.…”

Section: Introductionmentioning

confidence: 99%

Further evidence for superterminal raindrops

Larsen

Kostinski

Jameson³

2014

Geophysical Research Letters

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A network of optical disdrometers (including laser precipitation monitors and a two-dimensional video disdrometer) was utilized to determine whether the recent reports of "superterminal" raindrops were spurious results of drop breakup occurring on instrumentation. Results unequivocally show that superterminal raindrops at small (less than 1 mm) sizes are ubiquitous, are measurable over an extended area, and appear in every rain event investigated. No evidence was found to suggest that superterminal drops are the result of drop breakup due to impact with the measurement instrument; thus, if the superterminal drops are the result of drop fragmentation, this fragmentation happens in the ambient atmosphere during all rain events measured in this study. The ubiquity of superterminal drops at small drop sizes raises natural questions regarding rain accumulation estimations, estimates of drop size distributions, and erosion characterization.

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“…The actual size depends on the manufacturer, but it is on the order of tens of square centimeters. Thus, for instance, Parsivel, version 1 (Parsivel-1), disdrometers have a 180 mm 3 30 mm area (54 cm 2 ), Thies's disdrometer (Frasson et al 2011) has a 228 mm 3 20 mm area (46 cm 2 ), and the optical-spectro pluviometer (OSP; Hauser et al 1984) has a 250 mm 3 40 mm area (100 cm 2 ). Another type of disdrometer, the Joss-Waldvogel disdrometer (JWD; Löffler-Mang and Joss 2000), has an area of about 50 cm 2 , whereas 2D video disdrometers (2DVDs; Kruger and Krajewski 2002) are in the range of 100 cm 2 .…”

Section: Introductionmentioning

confidence: 99%

On the Optimal Measuring Area for Pointwise Rainfall Estimation: A Dedicated Experiment with 14 Laser Disdrometers

Tapiador

Navarro

Moreno

et al. 2017

Journal of Hydrometeorology

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Laser disdrometers measure the particle size distribution (PSD) of hydrometeors through a small cross-sectional (tens of square centimeters) surface. Such a limited area induces a sampling effect in the estimates of the PSD, which translates to error in the reflectivity-rain-rate (Z-R) relationship used for ground radar estimates of rainfall, estimates of kinetic energy of precipitation, and any other hydrometeorological application relying on particle size information. Here, the results of a dedicated experiment to estimate the extent of the effect of limited area sampling of rainfall are presented. Using 14 Parsivel, version 1 (Parsivel-1), disdrometers placed within 6 m 2 , it was found that the combined area of at least seven disdrometers is required for the estimates to start converging to a stable value. The results can be used to quantify the degree of over-/underestimation of precipitation parameters for a single instrument due to the limited collecting area effect. It has been found that a single disdrometer may underestimate instantaneous rain rate by 70%.

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Assessment of the Thies optical disdrometer performance

Cited by 93 publications

References 31 publications

Multifractal comparison of the outputs of two optical disdrometers

Multifractal comparison of the outputs of two optical disdrometers

Further evidence for superterminal raindrops

On the Optimal Measuring Area for Pointwise Rainfall Estimation: A Dedicated Experiment with 14 Laser Disdrometers

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