Named storms Hurricanes Cat 4

Figure 2.2 Number of total named storms, hurricanes and category 4-5 storms since 1851, filtered by an 11-year running mean

Note: Based on data obtainable from Intensity of major hurricanes prior to 1970 is adjusted following Landsea. Source: Courtesy of J. Belanger.

Atlantic. Figure 2.4 shows the time series of total named storms and the average SST in the main development region of the North Atlantic. Comparison of the two time series shows coherent variations of the number of storms and the SST for periods greater than 20 years. In particular, the period 1910-1920 with low storm activity is associated with anomalously cool SSTs.

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