The periodic solutions of a delayed sea-air oscillator coupling model for the ENSO
厄尔尼诺-南方涛动时滞海气振子耦合模型的周期解

Using Mawhin's continuation theorem, the existence of periodic solutions for a class of nonlinear problem are first discussed, and then by using it, the problem of periodic solutions for a delayed sea-air oscillator coupling model for the ENSO is investigated. A new result on the existence of periodic solutions to the model is obtained.