Fig. 5 | Nature Communications

Fig. 5

From: Recent enhanced high-summer North Atlantic Jet variability emerges from three-century context

Fig. 5

Late twentieth century variance increase in North Atlantic and North Pacific Basin. Running (31-year window) coefficients of variance of August NAJ time series (g) are compared to time series of observed (a) and modeled (b) quasi-resonant amplification (QRA) fingerprint15, of reconstructed zonal and meridional flow in the North Pacific36 (c), and of variance in the climate dynamics of the North (d, e) and Central (f) Pacific. Variance time series include the Pacific storm track33 (31-year standard deviation; d), California Current Winter Index32 (CCWI; 31-year standard deviation; e), and NIÑO4 SST index31 (31-year variance; f). The late twentieth century increased variance period (1960–present) is highlighted in gray. Horizontal dashed line in g represents the highest 31-year values over the reconstruction period (1725–1978 CE)

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