Articles | Volume 16
11 Jun 2019
 | 11 Jun 2019

Raindrop shapes and fall velocities in “turbulent times”

Merhala Thurai, Michael Schönhuber, Günter Lammer, and Viswanathan Bringi

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Cited articles

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Beard, K. V., Bringi, V. N., and Thurai, M.: A new understanding of raindrop shape, Atmos. Res., 97, 396–415,, 2010. 
Bringi, V., Thurai, M., and Baumgardner, D.: Raindrop fall velocities from an optical array probe and 2-D video disdrometer, Atmos. Meas. Tech., 11, 1377–1384,, 2018. 
Fernández-Raga, M., Palencia, C. Keesstra, S., Jordán, A., Fraile, R., Angulo-Martínez, M., and Cerdà, A..: Splash erosion: A review with unanswered questions, Earth-Sci. Rev., 171, 463–477,, 2017. 
Foote, G. B. and Du Toit, P. S.: Terminal velocity of raindrops aloft, J. Appl. Meteor., 8, 249–253,<0249:TVORA>2.0.CO;2, 1969. 
Short summary
Raindrop shapes and fall velocities are presented for two high-wind/turbulent events. Results show strong gusts, directional wind shifts and/or inferred high turbulence intensity are correlated with reduced fall speeds, reaching values ~ 25–30 % less than the expected values, i.e. sub-terminal fall speeds. Significant percentage of asymmetric drops deviating from the most probable ax-isymmetric shapes was also detected during high turbulent intensities.