Articles | Volume 10, issue 7
https://doi.org/10.5194/amt-10-2499-2017
https://doi.org/10.5194/amt-10-2499-2017
Research article
 | 
17 Jul 2017
Research article |  | 17 Jul 2017

Ice crystal characterization in cirrus clouds: a sun-tracking camera system and automated detection algorithm for halo displays

Linda Forster, Meinhard Seefeldner, Matthias Wiegner, and Bernhard Mayer

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Cited articles

Alpaydin, E.: Introduction to Machine Learning, Adaptive Computation and Machine Learning, 2nd edn., MIT Press, Cambridge, 2010.
Baran, A. J. and Labonnote, L. C.: On the reflection and polarisation properties of ice cloud , J. Quant. Spectrosc. Ra., 100, 41–54, https://doi.org/10.1016/j.jqsrt.2005.11.062, 2006.
Baran, A. J., Furtado, K., Labonnote, L.-C., Havemann, S., Thelen, J.-C., and Marenco, F.: On the relationship between the scattering phase function of cirrus and the atmospheric state, Atmos. Chem. Phys., 15, 1105–1127, https://doi.org/10.5194/acp-15-1105-2015, 2015.
Bradski, D. G. R. and Kaehler, A.: Learning Opencv, 1st edn., O'Reilly Media, Inc., Sebastopol, 2008.
Breiman, L.: Bagging Predictors, Mach. Learn., 24, 123–140, https://doi.org/10.1023/A:1018054314350, 1996.
Short summary
Halo displays are produced by scattering of sunlight by smooth, hexagonal ice crystals. Consequently, the presence of a halo should contain information on particle shape. This study presents HaloCam, a novel sun-tracking camera system, and an automated detection algorithm to collect and evaluate long-term halo observations. Two-year HaloCam observations revealed that about 25 % of the detected cirrus clouds occurred together with a 22° halo indicating the presence of smooth, hexagonal crystals.