Fig. 4: Factors contribute to enhanced impact of AL on ENSO.
From: Enhanced impact of the Aleutian Low on increasing the Central Pacific ENSO in recent decades
Scatter plots of the Mar(0) ALI-related 850-hPa winds anomalies in AM(0) averaged over tropical western-central Pacific (TWCP, box in Fig. 2b) for 23-year running period against a the 23-year running correlations between the Mar(0) ALI and D(0)JF(+1) Niño-3.4 SST index, and against b the Mar(0) SLP anomalies averaged over subtropical North Pacific (box in Fig. 2a). Scatter plots of the Mar(0) SLP anomalies averaged over subtropical North Pacific against c the 23-year running correlations of the Mar(0) ALI and D(0)JF(+1) Niño3.4 SST index, and against d the climatology of 500-hPa zonal wind averaged over mid-latitude North Pacific (27.5°N–32.5°N,135°E–130°W). Scatter plots of the air-sea coupling strength over the subtropical northeastern Pacific (see “Methods”) against e the 850-hPa zonal wind anomalies averaged over the TWCP, and against f the 23-year running correlations between the Mar(0) ALI and D(0)JF(+1) Niño-3.4 SST index. Red lines indicates the best linear fit. Blue lines indicate the 95% confidence range of the linear regression.
