Abstract
The effect of a periodic forcing on the intensity of El Nino-Southern Oscillation (ENSO) is studied using the Cane-Zebiak model. With a basic seasonal climate close to the present, ENSO can be suppressed by a substantially enhanced seasonal external equatorial wind, which could be induced by monsoon forcing. ENSO suppression is usually more effective for an unstable self-exciting ENSO than for a stable stochastic-exciting ENSO. In addition, ENSO also tends to be suppressed by sufficiently strong periodic forcings of longer periods. The suppression of ENSO seems to be related to the nonlinear mechanism of frequency entrainment. These conclusions are in qualitative agreement with previous studies of conceptual ENSO models, although the Cane-Zebiak model shows a much more complicated dependence of the amplitude of ENSO on periodic forcing.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
