Articles | Volume 19, issue 1
Atmos. Chem. Phys., 19, 639–648, 2019

Special issue: Particle-based methods for simulating atmospheric aerosol...

Atmos. Chem. Phys., 19, 639–648, 2019

Research article 17 Jan 2019

Research article | 17 Jan 2019

Cloud-droplet growth due to supersaturation fluctuations in stratiform clouds

Xiang-Yu Li et al.

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Cited articles

Berry, E. X. and Reinhardt, R. L.: An analysis of cloud drop growth by collection: Part I. Double distributions, J. Atmos. Sci., 31, 1814–1824, 1974. a
Brandenburg, A.: Pencil Code,, 2018. a, b
Brenguier, J.-L., Bourrianne, T., Coelho, A. A., Isbert, J., Peytavi, R., Trevarin, D., and Weschler, P.: Improvements of droplet size distribution measurements with the Fast-FSSP (Forward Scattering Spectrometer Probe), J. Atmos. Ocean. Tech., 15, 1077–1090, 1998. a, b
Chandrakar, K. 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., 113, 14243–14248, 2016. a
Chen, S., Yau, M., and Bartello, P.: Turbulence effects of collision efficiency and broadening of droplet size distribution in cumulus clouds, J. Atmos. Sci., 75, 203–217, 2018. a
Short summary
The broadening of droplet size distributions in stratiform clouds, where the updraft velocity is almost zero, is puzzling. Without turbulence, the classical treatment of condensational growth of cloud droplets fails to explain this broadening. We investigated the time evolution of droplet size distributions using direct numerical simulations, where turbulence is resolved into the smallest scales. We found that the broadening is due to the turbulence-facilitated supersaturation fluctuations.
Final-revised paper