Polar

ModelingToolkit implementation of the Polar atmospheric aerosol size distribution, from Seinfeld & Pandis (2006), Atmospheric Chemistry and Physics, 2nd ed., Chapter 8 ("Properties of the Atmospheric Aerosol"), Table 8.3. The Polar distribution is a preset of the multi-modal lognormal AerosolDistribution model: three lognormal modes (N = [21.7, 0.186, 3.0e-4] cm^-3, D_g = [0.138, 0.75, 8.6] um, log10 sigma = [0.245, 0.300, 0.291]) — a dilute accumulation mode plus two coarse modes characteristic of the very clean polar atmosphere. The model represents the aerosol number, surface-area and volume distributions as a sum of the three modes (Eq. 8.54) and reports the total number/surface/volume concentrations, the mode-1 Hatch-Choate diameters, and the vertical aerosol mass profile (Eq. 8.55). Migrated from Aerosol.jl PolarAerosol, a preset wrapper around AerosolDistribution(3). Purely algebraic: ten observed outputs, no differential states, an empty equations array. The upstream length-n_modes array parameters are scalarized at n_modes = 3 with the Polar Table 8.3 mode parameters as defaults.