Figure 1From: High-midlatitude ionosphere response to major stratospheric warming The results of common properties of the two SSW events. Left column shows SPW1 amplitude (upper plot), SPW2 amplitude (middle plot), and zonal mean zonal wind at 60°N (bottom plot) calculated from the UKMO data for winter 2008 to 2009. Right column shows the same characteristics for winter 2012 to 2013.Back to article page