Statistics of the Gulf Stream eddies of 20 years from 1993 to 2014. (a) Histograms of the eddy size. Black color indicates cyclonic eddies, while the gray color indicates anticyclonic eddies. (b) Histograms of the eddy lifetimes. (c) The spatial distribution of the site associated with the vertical color scale indicates the number of eddies’ center at each pixel. (d) Same as (c), but for anticyclonic eddies.