Group seminar on 7. February, 14:15 CET
Subtropical influences on the equatorial Kelvin wave
Atmospheric Kelvin waves (KWs) are equatorially trapped solutions of the linearised primitive equations. Within the context of rotating shallow-water equations, KWs can be generated through forcing of the continuity or momentum equations, that can be located in the tropics or in the subtropics. The background flow influences the KW development, for example through the Doppler shift. The findings from several studies will be presented. The discussion will be complemented with simulations using the TIGAR model, which includes the KW as a prognostic variable. Possible implications for the extratropical influence on the Madden-Julian Oscillation will also be discussed.