Radiative flux is evaluated on the half grid point. The subscript
indicates wave number. In the following sections, the superscript that
indicates the difference in time is omitted.
A Numerical Simulation of Thermal Convection in the Martian Lower Atmosphere with a Two-Dimensional Anelastic Model
Odaka, Nakajima, Ishiwatari, Hayashi,
Nagare Multimedia 2001