Over the past 40 years
of satellite observation,
Antarctic sea ice defied
global warming predictions,
and gained impressively.
The mean temperature
of the southern ice cap
also shows no warming.
In 2017, after decades
of inconvenient rise,
sea ice extent suddenly
fell to record low level
and global warming
alarmists began
to perk up.
They hoped the days
of a growing Antarctic
ice cap were over.
But since 2017,
the ice has grown back,
and once again has
reached near normal
levels, so the long-term
trend continues to be
up.
Sea ice extent
data up to 2019
from the JMA:
The latest May Antarctic
sea ice extent -- minimum
15% sea ice coverage --
has climbed to a 5-year high
for the month of May.
So the Antarctic
long-term trend
for sea ice
continues
to be upward.
No warming
One aspect that is
supposed to indicate
greenhouse gas
global warming
is rapid warming
at the poles.
Antarctic’s
ice cover,
and arguably
Greenland’s
ice cover too,
is evidence that
the planet is not
warming rapidly.
The Arctic’s
sea ice coverage
is mainly
controlled by
ocean cycles,
prevailing winds
and storms, so it
varies widely.