It's widely believed the
atmosphere and oceans
have been warming
since the 1600s.
Perhaps +2 degrees C.
since the cold period
in the late 1600s.
That warming was good news.
Actual local temperatures
are always fluctuating.
Local measurements
are combined with
wild guesses for
areas with no data
at monthly intervals
with a claimed
( hard to believe )
accuracy of
+/- 0.1 degrees C.
The global average statistic
is nothing more than an average
of local temperatures, not an actual
measured temperature itself.
Over one hundred different averages
of temperatures have been used
in meteorology and climate studies.
There is no physical basis for choosing
any one of these as the "best" average.
Earth is a planet not in
thermodynamic equilibrium,
meaning local temperatures
are always changing.
It's always possible
to combine
local temperature data,
at any point in time,
into a global average.
But no one actually lives
in the average temperature.
So does the 'average global
temperature' mean anything
to any individual ?
In fact, averaging hides details
that are very important:
-- If Alaska has warmer nights,
that's good news for people
who live there.
-- If Cairo, Egypt has warmer days,
that's bad news for people
who live there.
In fact, the primary climate
change since 1975 is warmer
winter nights at high latitudes,
not warmer summer days
near the equator.
That good news is hidden by
the use of a global average.
The mainstream media
never report those actual
effects of global warming
since 1975.
There is no global temperature.
There is only a global temperature statistic.
Averaghing obscures
important details
important details
about actual
global warming.
global warming.