Abstract
AbstractThe relationship between La Niña and tropical cyclone (TC) activity has not received as much attention as that between El Niño and TCs; in particular, the important role of TCs in affecting La Niña flavor has not been reported. This study reveals a clear feedback of TCs over the western North Pacific (WNP) on La Niña flavor by modulating the Walker circulation and thermocline. When strong WNP accumulated cyclone energy (ACE) occurs 3 months earlier, the center of sea surface temperature (SST) anomalies shifts to the equatorial eastern Pacific, favoring the development of eastern‐Pacific (EP) La Niña. In contrast, weak WNP ACE is associated with central‐Pacific (CP) La Niña, and the influence of WNP TCs on the intensity of CP La Niña may be larger than for EP La Niña. More evidence is provided in the predictions of EP and CP La Niña events using the ACE + SST model.
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