The Spatial Pattern of the Sun-Hurricane Connection across the North Atlantic
Figure 4
September sunspots (SSN) and regional hurricane count differences, early and late. (a) Regional North Atlantic hurricane count differences between the twenty-eight earliest high and low SSN seasons from a thirty-five storm seasons sample. Negative (positive) values indicate regions where fewer (more) hurricanes are observed during high SSN seasons compared to low. (b) A spatially smoothed plot of count differences, where each region’s raw count difference has been averaged with the average of its (maximum of) six neighbors. (c) Same as (a), but for the seven most recent sets of high and low SSN seasons. (d) Same as (b), but for the seven most recent high and low SSN seasons.
