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A blowing snow particle detector
AbstractThis blowing snow particle detector (PD) operates at temperatures from above freezing to −40°C and samples the range of blowing snow particle fluxes found from within 0.01 m of the snow surface to several metres height. It has a small sampling area, presents minimal interference with atmospheric flow, can be interfaced to an automated data retrieval system and requires only limited field maintenance.The PD utilizes a 20 mm long, 170 μm radius beam of near-infrared radiation to sense the presence of blowing snow particles. It detects snow particles with radii as small as 22.5 μm and velocities of the full range expected for atmospheric flow in the Earth's boundary-layer.Using Mie electromagnetic scattering theory, knowledge of the interception geometry formed by a snow particle and the beam and estimates of the snow particle size frequency distribution, a simple technique for calculating the blowing snow flux is developed and tested.
A blowing snow particle detector
AbstractThis blowing snow particle detector (PD) operates at temperatures from above freezing to −40°C and samples the range of blowing snow particle fluxes found from within 0.01 m of the snow surface to several metres height. It has a small sampling area, presents minimal interference with atmospheric flow, can be interfaced to an automated data retrieval system and requires only limited field maintenance.The PD utilizes a 20 mm long, 170 μm radius beam of near-infrared radiation to sense the presence of blowing snow particles. It detects snow particles with radii as small as 22.5 μm and velocities of the full range expected for atmospheric flow in the Earth's boundary-layer.Using Mie electromagnetic scattering theory, knowledge of the interception geometry formed by a snow particle and the beam and estimates of the snow particle size frequency distribution, a simple technique for calculating the blowing snow flux is developed and tested.
A blowing snow particle detector
Brown, T. (author) / Pomeroy, J.W. (author)
Cold Regions, Science and Technology ; 16 ; 167-174
1988-08-29
8 pages
Article (Journal)
Electronic Resource
English
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