Fig. 3: Inter-model differences in the southward wind shift pattern and its relationship with WWV skewness.
From: Multi-year La Niña frequency tied to southward tropical Pacific wind shift
An EOF analysis is applied to 33 patterns of 20th century ENSO-related zonal wind stress over the domain of (10°S–5°N, 130°E–80°W) from 33 CMIP6 models focusing on DJF season. A The first principal pattern (N m−2 s.d.−1) describes inter-model differences in the southward wind shift pattern, explaining 34% of the total variance. The purple contours indicate positive SST anomalies associated with the principal component, highlighting symmetric SST anomalies about the equator in comparison to the southward wind shift. B An inter-model relationship of WWV skewness with the corresponding principal component (s.d.). The correlation coefficient, slope and p value are indicated. The inter-model differences in the southward wind shift can explain the inter-model spread in the WWV skewness.
