Articles | Volume 21, issue 10
https://doi.org/10.5194/acp-21-7545-2021
https://doi.org/10.5194/acp-21-7545-2021
Research article
 | 
18 May 2021
Research article |  | 18 May 2021

Shape dependence of snow crystal fall speed

Sandra Vázquez-Martín, Thomas Kuhn, and Salomon Eliasson

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Cited articles

Barthazy, E. and Schefold, R.: Fall velocity of snowflakes of different riming degree and crystal types, J. Atmos. Res., 82, 391–398, https://doi.org/10.1016/j.atmosres.2005.12.009, 2006. a, b, c, d, e, f
Baum, B. A., Yang, P., Heymsfield, A. J., Schmitt, C. G., Xie, Y., Bansemer, A., Hu, Y.-X., and Zhang, Z.: Improvements in Shortwave Bulk Scattering and Absorption Models for the Remote Sensing of Ice Clouds, J. Appl. Meteorol. Clim., 50, 1037–1056, https://doi.org/10.1175/2010JAMC2608.1, 2011. a
Brandes, E. A., Ikeda, K., Thompson, G., and Schönhuber, M.: Aggregate Terminal Velocity/Temperature Relations, J. Appl. Meteorol. Clim., 47, 2729–2736, https://doi.org/10.1175/2008JAMC1869.1, 2008. a
Cooper, S. J. and Garrett, T. J.: Identification of small ice cloud particles using passive radiometric observations, J. Appl. Meteorol., 49, 2334–247, 2010. a
Dunnavan, E. L.: How Snow Aggregate Ellipsoid Shape and Orientation Variability Affects Fall Speed and Self-Aggregation Rates, J. Atmos. Sci., 78, 51–73, https://doi.org/10.1175/JAS-D-20-0128.1, 2021. a, b
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In this work, we present new fall speed measurements of natural snow particles and ice crystals. We study the particle fall speed relationships and how they depend on particle shape. We analyze these relationships as a function of particle size, cross-sectional area, and area ratio for different particle shape groups. We also investigate the dependence of the particle fall speed on the orientation, as it has a large impact on the cross-sectional area.
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