Scatter plot of detrended historical northern hemisphere 200-hPa jet latitude shift related to EEI against climatological 200-hPa hygropause latitude relative to the jet ( Methods ). The correlation is indicated (sample size = 25) along with the line of best fit (black) and the observed 200-hPa tropopause latitude relative to the jet (vertical grey line). Whiskers show 5–95% confidence intervals ( Methods ). All time series have been linearly detrended for this panel only. This panel uses all historical simulations (Table 1 ).
