Anomalous winter climate conditions in the Pacific rim during recent El Niño Modoki and El Niño events

Hengyi Weng ·Swadhin K. Behera · Toshio Yamagata

R98229029 Han-ching Chen

Motivation• Southwestern USA during boreal winter may be due to a

northward shift of the intertropical convergence zone (ITCZ), resulting in increased northward transport of water vapor from the tropical Pacific.

• An anomalous low-level anticyclone over the cold sea surface temperature anomaly (SSTA) of the Philippine Sea was thought to be the key system bridging ‘‘El Nino’’ and a weak East Asian winter monsoon.

El Niño Modoki and El Niño events are different??

R = 0.267 Largely independent

ITCZ SPCZ SACZ PDZ