Consider a
60-year cycle,
in the Pacific Ocean,
that periodically
warms that ocean,
by +2 degrees Celsius,
for 25-30 years.
Then the
Pacific Ocean
temperatures
drop back to
roughly
their earlier level,
for the next
25-30 years.
It’s called the
Pacific
Decadal
Oscillation,
or PDO.
The record shows
PDO warmings
from 1860 to 1880,
1915 to 1940, and
from 1976 to 1998.
Global warming
from 1976-1998,
could be explained
by yet another
PDO warming cycle.
We’ve had many
warming and cooling
climate scare headlines,
in the past century,
that coincide with
PDO warming and
PDO cooling trends.
When the PDO trend
was cooling,
we scared ourselves
about a coming Ice Age.
When the PDO trend
was warming,
we scared ourselves
about an “ice-free Arctic”
and a huge sea level rise.
This current
PDO cooling phase,
starting in 1998,
should end
in 25 to 30 years