Figure 11: Correlations between number of Australian tropical cyclones
observed in the total cyclone season and three-month averages of three
variables associated with ENSO. The thick horizontal bar indicates
the extent of the cyclone season. Central month of three-month averages
of the ENSO variables are indicated on the horizontal axis. Data are
from 1964-1982. All correlations are calculated on at least 18 pairs
of observations (from Nicholls 1984).