A Proof-of-Concept Algorithm for the Retrieval of Total Column Amount of Trace Gases in a Multi-Dimensional Atmosphere

An algorithm for the retrieval of total column amount trace gases in a multi-dimensional atmosphere is designed. The uses (i) certain differential radiance models with internal and external closures as inversion models, (ii) iteratively regularized Gauss–Newton method regularization tool, (iii) spherical harmonics discrete ordinate (SHDOM) linearized radiative transfer model. For efficiency reasons, SHDOM equipped spectral acceleration approach that combines correlated k-distribution principal component analysis. used to retrieve nitrogen two- three-dimensional cloudy scenes. Although geometries, computational time high, main concepts are correct results accurate.