열대 동태평양에서 ENSO와 계절 주기와의 상관성

Abstract

The El Nino-Southern Oscillation (ENSO) is an abnormal change of the annual cycle, and thus, change in ENSO is closely related to change in the annual cycle. So far, it is known that the change in the amplitude of ENSO is negatively correlated to that in the amplitude of the annual cycle. Here we analyzed 500-year simulation of a coupled GCM in order to investigate the relationship between ENSO and annual cycle in the tropical eastern Pacific. The negative correlation between the decadal change in the ENSO amplitude and that in the annual cycle is dominant, yet the positive correlation is also significant for some decadal periods. Here, we propose the possible mechanisms to lead the positive and negative correlations.