Articles | Volume 21, issue 18
https://doi.org/10.5194/acp-21-14039-2021
https://doi.org/10.5194/acp-21-14039-2021
Research article
 | 
22 Sep 2021
Research article |  | 22 Sep 2021

Environmental sensitivities of shallow-cumulus dilution – Part 2: Vertical wind profile

Sonja Drueke, Daniel J. Kirshbaum, and Pavlos Kollias

Related authors

Environmental sensitivities of shallow-cumulus dilution – Part 1: Selected thermodynamic conditions
Sonja Drueke, Daniel J. Kirshbaum, and Pavlos Kollias
Atmos. Chem. Phys., 20, 13217–13239, https://doi.org/10.5194/acp-20-13217-2020,https://doi.org/10.5194/acp-20-13217-2020, 2020
Short summary

Cited articles

Asai, T.: Cumulus Convection in the Atmosphere with Vertical Wind Shear: Numerical Experiment, J. Meteorol. Soc. Jpn., 42, 245–259, https://doi.org/10.2151/jmsj1923.42.4_245, 1964. a, b
Bera, S. and Prabha, T. V.: Parameterization of Entrainment Rate and Mass Flux in Continental Cumulus Clouds: Inference From Large Eddy Simulation, J. Geophys. Res.-Atmos., 124, 13127–13139, https://doi.org/10.1029/2019JD031078 2019. a
Betts, A. K.: Parametric Interpretation of Trade-Wind Cumulus Budget Studies, J. Atmos. Sci., 32, 1934–1945, https://doi.org/10.1175/1520-0469(1975)032<1934:PIOTWC>2.0.CO;2, 1975. a, b
Brown, A. R.: Large-Eddy Simulation and Parametrization of the Effects of Shear on Shallow Cumulus Convection, Bound.-Lay. Meteorol., 91, 65–80, https://doi.org/10.1023/A:1001836612775, 1999. a, b, c, d, e
Brown, A. R., Cederwall, R. T., Chlond, A., Duynkerke, P. G., Golaz, J.-C., Khairoutdinov, J. M., Lewellen, D. C., Lock, A. P., Macvean, M. K., Moeng, C.-H., Neggers, R. A. J., Siebesma, A. P., and Stevens, B.: Large-eddy simulation of the diurnal cycle of shallow cumulus convection over land, Q. J. Roy. Meteor. Soc., 128, 1075–1094, https://doi.org/10.1256/003590002320373210, 2002. a, b, c
Short summary
This numerical study provides insights into the sensitivity of shallow-cumulus dilution to geostrophic vertical wind profile. The cumulus dilution is strongly sensitive to vertical wind shear in the cloud layer, with shallow cumuli being more diluted in sheared environments. On the other hand, wind shear in the subcloud layer leads to less diluted cumuli. The sensitivities are explained by jointly considering the impacts of vertical velocity and the properties of the entrained air.
Share
Altmetrics
Final-revised paper
Preprint