Fig. 3: Dominant coupled mode of variability of summer TX, on the one hand and Z500/SD/TN/SM on the other.

The TX spatial structure of the first CCA pair (a) explaining 17.09% of variance and its coupled Z500 (b), 11.82% of variance explained), SD pattern (c), 13.14% of variance explained, TN (d), 18.10% of variance explained) and SM (e), 13.11% of variance explained). The correlation between their corresponding time series (f) is 0.99.