10-hPa geopotential height (m) and the represetative ellipse that fits the 30 km 10-hPa geopotential height contour. The ellipse long and short axes are plotted along with the ellipse center. These are overlayed on the standardized temperature anomalies (reference temps are 1979-2010). For the 2012-2013 winter season.
Maps by A. Lang: Home
