Articles | Volume 19, issue 3
https://doi.org/10.5194/acp-19-1785-2019
https://doi.org/10.5194/acp-19-1785-2019
Research article
 | 
08 Feb 2019
Research article |  | 08 Feb 2019

Turbulent enhancement of radar reflectivity factor for polydisperse cloud droplets

Keigo Matsuda and Ryo Onishi

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Cited articles

Ayala, O., Rosa, B., and Wang, L.-P.: Effects of turbulence on the geometric collision rate of sedimenting droplets. Part 2. Theory and parameterization, New J. Phys., 10, 075016, https://doi.org/10.1088/1367-2630/10/7/075016, 2008a. a, b
Ayala, O., Rosa, B., Wang, L.-P., and Grabowski, W.: Effects of turbulence on the geometric collision rate of sedimenting droplets. Part 1. Results from direct numerical simulation, New J. Phys., 10, 075015, https://doi.org/10.1088/1367-2630/10/7/075015, 2008b. a
Balsley, B. and Gage, K.: The MST Radar Technique: Potential for Middle Atmospheric Studies, Pure Appl. Geophys., 118, 452–493, 1980. a
Bec, J., Homann, H., and Ray, S.: Gravity-Driven Enhancement of Heavy Particle Clustering in Turbulent Flow, Phys. Rev. Lett., 112, 184501, https://doi.org/10.1103/PhysRevLett.112.184501, 2014. a, b
Bohren, C. and Huffman, D.: Absorption and Scattering of Light by Small Particles, Wiley, 1983. a
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This paper presents a parameterization to predict the influence of microscale turbulent clustering of cloud droplets on the radar reflectivity factor, based on a direct numerical simulation (DNS) of turbulence. The proposed parameterization takes account of the turbulent clustering structure of droplets with arbitrary size distributions. This paper also discusses quantitative influences on realistic radar observations, applying the parameterization to high-resolution cloud-simulation data.
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