ldis: Laser Disdrometer

A laser disdrometer (LDIS) measures the drop size spectra and fall velocity of hydrometeors during precipitation events. The passage of hydrometeors through a horizontal area positioned between an eye-safe laser and an array detector results in blockage of the laser beam in proportion to the size of the drop or particle. In addition to drop/particle size and fall speed, precipitation type is classified.

ARM also deploys video disdrometers (VDIS).



  • Fixed
  • AMF1
  • AMF2
  • AMF3

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Machado L, A Calheiros, T Biscaro, S Giangrande, M Silva Dias, M Cecchini, R Albrecht, M Andreae, W Araujo, P Artaxo, S Borrmann, R Braga, C Burleyson, C Eichholz, J Fan, Z Feng, G Fisch, M Jensen, S Martin, U Pöschl, C Pöhlker, M Pöhlker, J Ribaud, D Rosenfeld, J Saraiva, C Schumacher, R Thalman, D Walter, and M Wendisch. 2018. "Overview: Precipitation characteristics and sensitivities to environmental conditions during GoAmazon2014/5 and ACRIDICON-CHUVA." Atmospheric Chemistry and Physics, 18(9), 10.5194/acp-18-6461-2018.


Neiman P, N Gaggini, C Fairall, J Aikins, J Spackman, L Leung, J Fan, J Hardin, N Nalli, and A White. 2017. "An Analysis of Coordinated Observations from NOAA's Ronald Brown Ship and G-IV Aircraft in a Landfalling Atmospheric River over the North Pacific during CalWater-2015." Monthly Weather Review, 145(9), 10.1175/MWR-D-17-0055.1.


Bartholomew MJ. 2014. ARM’s Handbook for the Parsivel2 Laser Disdrometer. U.S. DOE, Office of Science, Office of Biological and Environmental Research. DOE/SC-ARM-TR-137.


May PT, JH Mather, G Vaughan, KN Bower, C Jakob, GM McFarquhar, and GG Mace. 2008. "The Tropical Warm Pool International Cloud Experiment." Bulletin of the American Meteorological Society, 89(5), 10.1175/bams-89-5-629.

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