ld

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).

Fall velocity calculated after Lhermite
Intercept parameter, assuming an ideal Marshall-Palmer type distribution
Liquid water content
Median volume diameter, assuming an ideal Marshall-Palmer type distribution
Meteorological optical range visibility
Number of particles detected

Manacapuru, Amazonas, Brazil; Mobile Facility (GOAMAZON)

• Latitude: -3.21297
• Longitude: -60.5981
• Publication Date: 2014-09-24
• Start Date: 2014-09-24
• End Date: 2015-12-01
• Last Updated: 2019-12-16

https://www.arm.gov/connect-with-arm/organization/instrument-mentors/list#ldis

Jennifer Delamere

University of Alaska, Fairbanks

Yan Shi

Pacific Northwest National Laboratory

Mary Jane Bartholomew

Brookhaven National Laboratory

Matthew Sturm

University of Alaska, Fairbanks

Lily Cohen

University of Alaska, Fairbanks

Die Wang

Brookhaven National Laboratory

Kenneth Irving

University of Alaska, Fairbanks

Phillip Wilson

University of Alaska, Fairbanks

http://dx.doi.org/10.5439/1498731
Atmospheric Radiation Measurement (ARM) user facility. 2014, updated hourly. Laser Disdrometer (LD). 2014-09-24 to 2015-12-01, ARM Mobile Facility (MAO) Manacapuru, Amazonas, Brazil; Supplemental Site (S10). Compiled by Y. Shi. ARM Data Center. Data set accessed at http://dx.doi.org/10.5439/1498731.