Miyamoto, Y., S. Nishizawa, and H. Tomita, 2020: Impacts of number of cloud condensation nuclei on two-dimensional moist Rayleigh convection. J. Meteor. Soc. Japan, 98, 437-453.
https://doi.org/10.2151/jmsj.2020-023 Graphical Abstract with highlights
Plain Language Summary: The impacts of number of cloud condensation nuclei (CCN) on moist Rayleigh convection were examined by using a simple 2D fluid model with a double moment microphysics model. The effect is most prominent in the initially formed convection, whereas the convection in the quasi-steady state does not significantly depend on the number of CCN. It is suggested that the former convection forms by local buoyancy, while the latter is largely influenced by boundaries.
- The number of CCN affects convective cells initially formed in simulations, whereas the cells during the quasi-steady state are not sensitive.
- The overall impacts of incorporating a double-moment cloud microphysics are to reduce the integrated kinetic energy and number of convective cells (increase the distance between the cells).