  We consider a coupled atmosphere-ocean model, which involves hydrodynamics,
thermodynamics and nonautonomous interaction at the air-sea interface. First,
we show that the coupled atmosphere-ocean system is stable under the external
fluctuation in the atmospheric energy balance relation. Then, we estimate the
atmospheric temperature feedback in terms of the freshwater flux, heat flux and
the external fluctuation at the air-sea interface, as well as the earth's
longwave radiation coefficient and the shortwave solar radiation profile.
Finally, we prove that the coupled atmosphere-ocean system has time-periodic,
quasiperiodic and almost periodic motions, whenever the external fluctuation in
the atmospheric energy balance relation is time-periodic, quasiperiodic and
almost periodic, respectively.
