Size Spectra of Snow Particles Measured in Wintertime Precipitation in the Pacific Northwest
Journal of the Atmospheric Sciences, 2008 Abstract Particle size spectra collected by the University of Washington’s Convair-580 research aircraft at a variety of altitudes and temperatures in winter frontal and orographic precipitation systems during the Improvement of Microphysical Parameterization through Observational Verification Experiment (IMPROVE) are analyzed in this ...
John D. Locatelli +2 more
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Frontiers in Environmental Science, 2022 Dust particle studies in ice cores from the tropical Andes provide important information about climate dynamics. We investigated dust concentrations from a 22.7 m ice-core recovered from the Quelccaya Ice Cap (QIC) in 2018, representing 14 years of snow ...
Rafael S. dos Reis +7 more
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Ice Spheres as Model Snow: Tumbling, Sintering, and Mechanical Tests
Frontiers in Earth Science, 2019 The snow microstructure is crucial for the mechanical behavior of snow, but is usually simplified in numerical models. In Discrete Element Models (DEM), often used in snow mechanics, the microstructure is typically represented by sphere assemblies.
Carolin Willibald +4 more
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A particle filter scheme for multivariate data assimilation into a point-scale snowpack model in an Alpine environment [PDF]
The Cryosphere, 2018 The accuracy of hydrological predictions in snow-dominated regions deeply depends on the quality of the snowpack simulations, with dynamics that strongly affect the local hydrological regime, especially during the melting period.
G. Piazzi +3 more
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Assessing Single Particle Soot Photometer and Integrating Sphere/Integrating Sandwich Spectrophotometer measurement techniques for quantifying black carbon concentration in snow [PDF]
Atmospheric Measurement Techniques, 2012 We evaluate the performance of the Single Particle Soot Photometer (SP2) and the Integrating Sphere/Integrating Sandwich Spectrophotometer (ISSW) in quantifying the concentration of refractory black carbon (BC) in snow samples. We find that the SP2 can
J. P. Schwarz +7 more
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The importance of particle size distribution shape for triple-frequency radar retrievals of the morphology of snow [PDF]
, 2019 Abstract. The accurate representation of ice particles is essential for both remotely-sensed estimates of cloud and precipitation and numerical models of the atmosphere. As it is typical in radar retrievals to assume that all snow is composed of unrimed aggregate snowflakes, both denser rimed snow and the mixed-phase cloud in which riming occurs may be
Shannon L. Mason +4 more
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Applied Sciences, 2020 We present ground-based in situ snow measurements in Kiruna, Sweden, using the ground-based in situ instrument Dual Ice Crystal Imager (D-ICI). D-ICI records dual high-resolution images from above and from the side of falling natural snow crystals and ...
Sandra Vázquez-Martín +2 more
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Dual-wavelength radar technique development for snow rate estimation: a case study from GCPEx [PDF]
Atmospheric Measurement Techniques, 2019 quantitative precipitation estimation (QPE) of snowfall has generally been expressed in power-law form between equivalent radar reflectivity factor (Ze) and liquid equivalent snow rate (SR). It is known that there is large variability in the prefactor of
G.-J. Huang +7 more
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Improved scattering radiative transfer for frozen hydrometeors at microwave frequencies [PDF]
Atmospheric Measurement Techniques, 2014 To simulate passive microwave radiances in all-sky conditions requires better knowledge of the scattering properties of frozen hydrometeors. Typically, snow particles are represented as spheres and their scattering properties are calculated using Mie ...
A. J. Geer, F. Baordo
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The microwave properties of simulated melting precipitation particles: sensitivity to initial melting [PDF]
Atmospheric Measurement Techniques, 2016 A simplified approach is presented for assessing the microwave response to the initial melting of realistically shaped ice particles. This paper is divided into two parts: (1) a description of the Single Particle Melting Model (SPMM), a heuristic melting
B. T. Johnson +2 more
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