Analysis reveals that El Niño events significantly influence temperature variability in Eastern China and North America, while La Niña impacts are weaker.
Key Points
El Niño events markedly increase synoptic temperature variability in Eastern China and North America during boreal winter, unlike La Niña events.
Stronger ENSO events are linked to heightened winter temperature variability, while weaker events only impact the Pacific region.
Observations show that significant sea surface temperature anomalies display asymmetric patterns across the Pacific during different ENSO intensities.
AGCM experiments confirm the role of sea surface temperature anomalies in affecting lower-level temperature gradients, indicating regional climate impacts.