Extratropical Low‐Frequency Variability With ENSO Forcing: A Reduced‐Order Coupled Model Study

Extratropical forcing of ENSO

The Impact of Extratropical Atmospheric Variability on ENSO: Testing the Seasonal Footprinting Mechanism Using Coupled Model Experiments

Previous studies suggest that extratropical atmospheric variability influences the tropics via the seasonal footprinting mechanism (SFM), in which fluctuations in the North Pacific Oscillation (NPO) impact the ocean via surface heat fluxes during winter and the resulting springtime subtropical SST anomalies alter the atmosphere–ocean system over the tropics in the following summer, fall, and wi...

The ENSO effect on the tropical Atlantic variability: A regionally coupled model study

[1] A CGCM is used to study the relative roles played by local air-sea interaction and remote ENSO effects on the tropical Atlantic interannual variability. A regional coupling strategy allows full air-sea coupling only over the Atlantic Ocean north of 30!S. Two experiments were conducted, respectively with either climatological or real time boundary conditions prescribed over the uncoupled por...

The Response of a Coupled Model of ENSO to Observed Estimates of Stochastic Forcing

In this work the role that observed intraseasonal atmospheric variability may play in controlling and maintaining ENSO variability is examined. To this end, an asymptotically stable intermediate coupled model of El Niño– Southern Oscillation (ENSO) is forced with observed estimates of stochastic forcing, which are defined to be the part of the atmospheric variability that is apparently independ...

Contrasting Indian Ocean SST variability with and without ENSO influence: A coupled atmosphere-ocean GCM study

In this study, we perform experiments with a coupled atmosphere-ocean general circulation model (CGCM) to examine ENSO’s influence on the interannual sea-surface temperature (SST) variability of the tropical Indian Ocean. The control experiment includes both the Indian and Pacific Oceans in the ocean model component of the CGCM (the Indo-Pacific Run). The anomaly experiment excludes ENSO’s infl...