Figure 4 : Sample lifetimes and longitudinal distribution of BP clusters visible in hemispheric Hovmöller diagrams.

From: The detection of Rossby-like waves on the Sun

Figure 4

a, Histogram of the ellipse lifetimes; b, central positions, for the hemispheric examples shown in Fig. 3 (see also Supplementary Fig. 1). In each case, we show the distributions for the northern hemisphere (red), southern hemisphere (blue) and their sum (black).