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--- intercomparisons:d4_aerosol_spheroid [2025/09/15 13:37] – claudia
+++ intercomparisons:d4_aerosol_spheroid [2026/02/18 13:50] (current) – claudia
@@ Line 1: / Line 1: @@
+==== Case D4: Aerosol layer (spheroid) ====
+This case includes the same setup as case D1 but including spheroidal aerosol particles instead of molecules.
+//Setup://
+  * no molecules
+  * aerosol optical thickness: 0.2
+  * aerosol optical properties: {{:intercomparisons:phase_a:sizedistr_spheroid.cdf|netCDF}},{{:intercomparisons:phase_a:sizedistr_spheroid.dat|ascii}} \\ The variable "phase" includes the phase matrix, as a function of the scattering angle (variable "theta"). The 4x4 scattering phase matrix for spherical droplets has six non-zero elements, which are stored in the following order: $ P = \begin{pmatrix} P1 &  P2 &  0 & 0 \\ P2 & P5 & 0 & 0 \\ 0 & 0 & P3 & P4 \\ 0 & 0 & -P4 & P6 \end{pmatrix} $ \\ The corresponding Legendre polynomials ("pmom") and the single scattering albedo ("ssa") are also included in the file.
+  {{ :intercomparisons:phase_a:spheroids.png?900 |}}
+The expansion moments over generalized spherical functions for the phase matrix have been provided by S. Korkin and are available {{:intercomparisons:phase_a:XK_A4.txt|here.}}
+  * Earth radius: 6371 km
+  * Thickness of layer: 120 km
+  * Sun-observer geometries as defined in general settings:
+      * //viewing zenith angles// (deg): [0, 9, 18, 26, 34, 41, 48, 54, 60, 65, 70, 74, 78, 81, 84, 86, 88, 89, 90] (up-looking at bottom of atmosphere, down-looking at top of atmosphere]
+      * //viewing azimuth angles// (deg): 0-180, 10° increment
+      * //solar zenith angles// (deg): [30, 60, 80, 87, 90, 93, 96, 99]
+      * //solar azimuth angle// (deg): 0
+      * //sensor altitude// (km): 0, 120