Fig. 8
From: Warm Arctic episodes linked with increased frequency of extreme winter weather in the United States
Warming trend in Arctic coincides with increased severe winter weather. The annual daily trend in the a PCH (shading) and b PCT (shading) from the surface to the mid-stratosphere (10 hPa) and the annual trend in the daily change in the AWSSI for three eastern US cities (near Boston, Chicago, Detroit) and three western US cities (Helena, Salt Lake City, Seattle) for the winters 1990/91–2015/16 multiplied by the total number of winters. Statistical significance above 90% for PCH and PCT trends are hatched in dark gray. In Supplementary Figure 8 we have included the variability in the AWSSI with the daily trend
