The atmospheric radiative transfer is central to understanding the workings of the climate system. This course covers the physical principles, quantitative analysis, and numerical modeling of atmospheric radiation and its interaction with atmospheric constituents (gases, aerosol, and clouds) and the surface. Topics to be covered include the radiative balance at the surface, radiative forcing at the top of the atmosphere, radiative heating/cooling rates, actinic fluxes, methods for solving the one- and three-dimensional radiative transfer, radiation codes in regional and global atmospheric dynamical models, among others.