Seinfeld_pandis

Composed cloud microphysics model (Seinfeld & Pandis 2006, Ch. 17). Flat composition of CloudDynamics (adiabatic thermodynamics, LCL height), IcePhysics (freezing point depression, ice nuclei), RainFormation (collision-coalescence, raindrop spectra), and AerosolScavenging (scavenging ratios and coefficient). Shared physical constants M_w and R unify CloudDynamics and IcePhysics. Ice particle diameter (D_p_ice) and collector drop diameter (D_p_rain) are kept as independent parameters. Migrated from Aerosol.jl src/cloud_physics.jl:735 (esm-c8z).

Diffusional growth rate of a cloud droplet by condensation of water vapor. Accounts for vapor-phase diffusion (D_v), the kinetic correction to the diffusivity (D_v'), thermal conductivity of air (k_a and k_a'), and the curvature + solute (Köhler) contributions to the equilibrium saturation ratio S_eq over the droplet surface. Output is the droplet-diameter growth rate dD_p/dt (m/s) from Seinfeld & Pandis (2006) Eq. 17.70. Source: Aerosol.jl@c8c640bb src/cloud_physics.jl:322 (mtk2esm-scaffolded, mdl-43a).

Rain formation by collision and coalescence (Seinfeld & Pandis 2006, Eqs. 17.104-17.108). Computes collection efficiency, continuous accretion rate, and raindrop size distributions (Best CDF and Marshall-Palmer number density).