Figure 2-6 Time series of tropical cyclones (tropical storms and hurricanes) in the Central North Pacific basin from 1966 to 2010. Although a period of greater tropical cyclone activity occurred from the 1980s to the mid-1990s, the basin has again entered a quieter period, with fewer average annual occurrences of storms. Broken lines denote the averages for the periods 1966–1981, 1982–1994, and 1995–2010.
(Modified and updated from Chu, P.-S. (2002). Large-scale circulation features associated with decadal variations of tropical cyclone activity over the Central North Pacific. Journal of Climate, 15(18), 2678–2689. doi:10.1175/1520-0442(2002)015<2678:LSCFAW>2.0.CO;2 © American Meteorological Society. Used with permission.)