Fig. 4: Contribution of North Atlantic seesaw pattern (SCA) to the enhanced East Asian jet (EAJ) variability.
From: Atlantic origin of the increasing Asian westerly jet interannual variability
a Regression maps of February 850-hPa geopotential height (H850; units: gpm) and surface wind (only show vectors with p < 0.10; units: m s−1) anomalies against the EAJ index during P2. Dotted areas are statistically significant at the 0.05 confidence level. b Scatter diagram for normalized EAJ and SCA indices during P1 (light blue dots) and P2 (red dots). The solid line is an ordinary least-squares fit for P2, with shading as the 95% confidence interval. Source data are provided as a Source Data file. c EAJ variability, measured by standard deviation (SD; units: m s−1) for the post-1999 period, with the original variability (green bar) and that after linearly removing SCA signal (light blue bar), see Supplementary Table 2. Error bars of the multi-data mean is the SD among datasets.
