Regression between boreal winter (OctoberMarch) 31-year EEI and zonal mean temperature (K per W m - 2 ) for CNRM-CM6-1. Grey contours show climatological (19852014) zonal mean zonal wind (contour interval 5 ms -1 , negative values dashed). Stippling shows where the two models have significantly opposite signs ( Methods ). Yellow lines show the climatological hygropause defined by the specific humidity contour 10 -5 kg kg -1 and yellow circles show the 200-hPa hygropause latitude, diagnosed as being where this specific humidity intersects the 200-hPa pressure level in the Northern Hemisphere. Magenta circles show the climatological jet latitude at 200 hPa ( Methods ). Note the nonlinear colour scale. All time series were linearly detrended before computing the regressions.
