Forced planetary waves in a two-level model and evaluation of the upper boundary condition
Chen, S. C., & Trenberth, K. E. (1985). Forced planetary waves in a two-level model and evaluation of the upper boundary condition. Journal Of The Atmospheric Sciences, 42, 2415-2437. doi:10.1175/1520-0469(1985)042<2415:FPWIAT>2.0.CO;2