Development and evaluation of a bulk three-moment parameterization scheme incorporating the processes of sedimentation and collision-coalescence

ABSTRACT
 There are few three-moment schemes that consider other processes besides sedimentation. Then, a performance assessment of these type due the combined effect sedimentation and microphysical is matter interest. In this study, warm rain bulk parameterized scheme was developed evaluated through detailed comparison with bin scheme. To evaluate impact sedimentation, collision-coalescence on droplet size distribution (DSD), rainshaft model applied to DSD different initial values shape parameter.
 For pure good correspondence obtained between explicit model, practically perfect coincidence quantities for larger parameter gamma distribution, in general, parameterization performing much better than two-moment The simulations performed case confirm (as reported previous studies) deliver more physically complete representation evolution.
 also assessed. We could observe certain differences arise spectral when coalescence collision process incorporated, as onset precipitation occurs earlier It can be concluded that, microphysics able reproduce results reference model.