Fig. 11From: Extraordinary quasi-16-day wave activity from October 2013 to January 2014 with radar observations at mid-latitudes and MERRA2 reanalysis data(arrow) EP flux vector and (color shading) EP flux divergence on a 8 November 2013, b 8 December 2013, c 5 February 2014 and d 15 March 2014. The EP flux vector is weighted by the square root of pressure ratio, and then the vertical component is multiplied by a factor of 200Back to article page