Extended Data Figure 5: Observed trend pattern of seasonal mean 200-hPa geopotential height for 1979–2012.
From: Tropical forcing of the recent rapid Arctic warming in northeastern Canada and Greenland
Linear trend (per decade) of seasonal mean ERA-interim 200-hPa geopotential height for a, DJF, b, MAM, c, JJA and d, SON for the period 1979–2012. Solid (dashed) contours indicate positive (negative) trends.
