Response of Atmospheric Low-frequency Wave to Oceanic Forcing in the Tropics

The effects of oceanic forcing on the atmospheric low-frequency wave (LFW for short) in the tropics are analyzed, where ocean and atmosphere are taken as an independent system, respectively. Here oceanic effects are parameterized as evaporation-wind feedback (EWF for short) and forcing of SST. Under the modulation of EWF, forcing of SST plays a different role from that without EWF. So LFWs are diabatic waves, forced by the interactions of multiple factors, in the tropics.