«We do know that if you heat up the oceans, you tend to increase
the length of hurricane season and have storms earlier and later in season,» Masters said.
NOAA has issued its annual forecast for the
hurricane season, along with its now - standard explanation that there is a natural cycle
of multidecadal (40 - 60 year)
length in the North Atlantic circulation (often referred to as the «Atlantic Multidecadal Oscillation» — see Figure), that is varying the frequency
of Atlantic tropical cyclones, and that the present high level
of activity is due to a concurrent positive peak in this oscillation.