Articles | Volume 20, issue 23
Atmos. Chem. Phys., 20, 14889–14901, 2020
Atmos. Chem. Phys., 20, 14889–14901, 2020

Research article 03 Dec 2020

Research article | 03 Dec 2020

Application of holography and automated image processing for laboratory experiments on mass and fall speed of small cloud ice crystals

Maximilian Weitzel et al.

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Cited articles

Alduchov, O. A. and Eskridge, R. E.: Improved Magnus form approximation of saturation vapor pressure, J. Appl. Meteorol., 35, 601–609,<0601:IMFAOS>2.0.CO;2, 1996. a
Baumgardner, D., Abel, S. J., Axisa, D., Cotton, R., Crosier, J., Field, P., Gurganus, C., Heymsfield, A. J., Korolev, A., Krämer, M., Lawson, P., McFarquhar, G., Ulanowski, Z., and Um, J.: Cloud Ice Properties: In Situ Measurement Challenges, Meteor. Mon., 58, 9.1–9.23,, 2017. a
Borrmann, S., Jaenicke, R., and Neumann, P.: On spatial distributions and inter-droplet distances measured in stratus clouds with in-line holography, Atmos. Res., 29, 229–245,, 1993. a
Bower, K. N. and Choularton, T. W.: The effects of entrainment on the growth of droplets in continental cumulus clouds, Q. J. Roy. Meteor. Soc., 114, 1411–1434,, 1988. a
Breiman, L., Friedman, J. H., Olshen, R. A., and Stone, C. J.: Classification and regression trees, CRC Press, New York, Routledge,, 2017. a
Short summary
The properties of ice crystals smaller than 150 µm in diameter were investigated in a cold-room laboratory using digital holography and microscopy. Automated image processing has been used to determine the track of falling ice crystals, and collected crystals were melted and scanned under a microscope to infer particle mass. A parameterization relating particle size and mass was determined which describes ice crystals in this size range more accurately than existing relationships.
Final-revised paper