Abstract
Recent high‐resolution space‐based observations reveal significant two‐way air‐sea interactions associated with tropical instability waves (TIWs) in the tropical oceans. But in most large‐scale climate modeling studies, the atmospheric wind response to TIW‐induced sea surface temperature (SSTTIW) anomalies has not been taken into account realistically and thus the corresponding feedbacks to the ocean are not known. Here we apply a singular value decomposition (SVD) analysis to satellite data to derive an empirical model for the SSTTIW induced wind stress (τTIW) variability in the eastern tropical Pacific. The derived SSTTIW‐τTIW relationship is then nested into a basin‐scale ocean and a hybrid coupled ocean‐atmosphere model of the tropical Pacific to take into account the TIW‐induced wind‐SST coupling. It is demonstrated that TIW‐induced wind feedback to the ocean can have a rectified effect on large‐scale mean ocean state and interannual variability, with an asymmetric difference in SST (a cooling) and a significant modulation of ENSO amplitude.
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