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).

Raw drop size distribution
Number of particles detected
Liquid water distribution mean, assuming an ideal Marshall-Palmer type distribution
Meteorological optical range visibility
New snow height
Fall velocity calculated after Lhermite
Median volume diameter, assuming an ideal Marshall-Palmer type distribution

MOSAIC (Drifting Obs - Study of Arctic Climate); Mobile Facility - Collocated Instruments on ice

• Latitude: 87.3859550524503
• Longitude: 105.742372199893
• Publication Date: 2019-10-17
• Start Date: 2019-10-17
• End Date: 2020-09-16
• Last Updated: 2021-05-28

MOSAIC (Drifting Obs - Study of Arctic Climate); Mobile Facility - MOSAIC (Drifting Obs - Study of Arctic Climate); AMF2

• Latitude: 87.3859550524503
• Longitude: 105.742372199893
• Publication Date: 2019-10-14
• Start Date: 2019-10-14
• End Date: 2020-09-20
• Last Updated: 2021-03-10

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

Die Wang

Brookhaven National Laboratory

Matthew Sturm

University of Alaska, Fairbanks

Phillip Wilson

University of Alaska, Fairbanks

Kenneth Irving

University of Alaska, Fairbanks

Jennifer Delamere

University of Alaska, Fairbanks

Yan Shi

Pacific Northwest National Laboratory

http://dx.doi.org/10.5439/1779709
Atmospheric Radiation Measurement (ARM) user facility. 2019. Laser Disdrometer (LD). 2019-10-17 to 2020-09-16, ARM Mobile Facility (MOS) Collocated Instruments on ice (S3). Compiled by D. Wang, M. Bartholomew and Y. Shi. ARM Data Center. Data set accessed at http://dx.doi.org/10.5439/1779709.