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ACP | Articles | Volume 20, issue 13
Atmos. Chem. Phys., 20, 7895–7909, 2020
https://doi.org/10.5194/acp-20-7895-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Chem. Phys., 20, 7895–7909, 2020
https://doi.org/10.5194/acp-20-7895-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Technical note 08 Jul 2020

Technical note | 08 Jul 2020

Technical note: Equilibrium droplet size distributions in a turbulent cloud chamber with uniform supersaturation

Steven K. Krueger

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Subject: Clouds and Precipitation | Research Activity: Laboratory Studies | Altitude Range: Troposphere | Science Focus: Physics (physical properties and processes)
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Cited articles

Chandrakar, K., Cantrell, W., Chang, K., Ciochetto, D., Niedermeier, D., Ovchinnikov, M., Shaw, R. A., and Yang, F.: Aerosol indirect effect from turbulence-induced broadening of cloud-droplet size distributions, P. Natl. Acad. Sci. USA, 113, 14243–14248, https://doi.org/10.1073/pnas.1612686113, 2016. a, b, c
Chandrakar, K. K., Cantrell, W., Ciochetto, D., Karki, S., Kinney, G., and Shaw, R. A.: Aerosol removal and cloud collapse accelerated by supersaturation fluctuations in turbulence, Geophys. Res. Lett., 44, 4359–4367, https://doi.org/10.1002/2017GL072762, 2017. a
Chandrakar, K. K., Cantrell, W., Kostinski, A., and Shaw, R. A.: Dispersion aerosol indirect effect in turbulent clouds: Laboratory measurements of effective radius, Geophys. Res. Lett., 45, 10738–10745, https://doi.org/10.1029/2018GL079194, 2018a. a, b, c, d, e
Chandrakar, K. K., Cantrell, W., Kostinski, A., and Shaw, R. A.: Data supporting the paper “Dispersion aerosol indirect effect in turbulent clouds: Laboratory measurements of effective radius”, available at: https://digitalcommons.mtu.edu/physics-fp/137 (last access: 22 October 2018), 2018b. a, b, c, d, e, f, g
Chandrakar, K. K., Cantrell, W., and Shaw, R. A.: Influence of turbulent fluctuations on cloud droplet size dispersion and aerosol indirect effects, J. Atmos. Sci., 75, 3191–3209, https://doi.org/10.1175/JAS-D-18-0006.1, 2018c. a, b, c, d, e
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When CCN are injected into a turbulent cloud chamber at a constant rate, and the rate of droplet activation is balanced by the rate of droplet fallout, a steady-state droplet size distribution (DSD) can be achieved. Analytic DSDs and PDFs of droplet radius were derived for such conditions when there is uniform supersaturation. Given the chamber height, the analytic PDF is determined by the supersaturation alone. This could allow one to infer the supersaturation that produced a measured PDF.
When CCN are injected into a turbulent cloud chamber at a constant rate, and the rate of droplet...
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