The Spatial Pattern of the Sun-Hurricane Connection across the North Atlantic
Figure 3
September sunspots (SSN) and regional hurricane counts. (a) Regional North Atlantic hurricane counts for the thirty-five lowest SSN seasons over the period 1851–2010. (b) The same, except for the thirty-five highest SSN seasons. (c) Their difference plot (i.e., high minus low). Negative (positive) values indicate regions where fewer (more) hurricanes are observed during high SSN seasons compared to low. (d) A spatially smoothed plot of count differences, where the raw count difference of each region has been averaged with the average of its (maximum of) six neighbors.
