(i)classical, under strong temperature inversion, dry air above the cloud top and thin wind shear layer in the cloud top region;
(ii)non-classical under weak temperature inversion, humid air above and deep shear layer.
In non-classical cases conditions prohibit Cloud Top Entrainment Instability. One of such cases (TO13) was used to prepare setup for LES (Large Eddy Simulation). We focus on sources of turbulence responsible for entrainment and mixing process. We perform a series of simulations varying wind shear and radiative cooling in a cloud-top region in order to understand formation of layers in the cloud top region, reported by Malinowski et al., 2013.
Reference: Malinowski, S. P., Gerber, H., Jen-La Plante, I., Kopec, M. K., Kumala, W., Nurowska, K., Chuang, P. Y., Khelif, D., and Haman, K. E., 2013: Physics of Stratocumulus Top (POST): turbulent mixing across capping inversion, Atmos. Chem. Phys., 13, 12171-12186, doi:10.5194/acp-13-12171-2013