Earth's global
average temperature
has warmed in the
past 325 years,
since the cold 1690s.
And that's good news,
even though no one
lives in the average
temperature !
The warming
was at least
+2 degrees C.,
but we don't have
very accurate
global average
temperature
records before
data from weather
satellites in 1979.
As a result of
that warming,
the climate
is more
comfortable
for humans.
The most warming
was in colder areas,
mainly during the six
coldest months
of the year, and
mainly at night.
Compilations of the
global average
temperature
began DURING this
325 year long
warming trend.
That means record highs
are expected regularly,
until the warming
trend ends, and a
cooling trend begins.
Some of the warming
since the 1690s is likely
to be caused by increasing
carbon dioxide (CO2)
in the atmosphere,
from fossil fuel burning.
No one knows how much.
Natural causes
of climate change
are not well
understood,
but have been
in progress for
4.5 billion years.
CO2 is invisible
to solar energy
coming in, but
disrupts cooling
of our planet,
which is heat
( infrared energy )
escaping into space.
The United Nations
claims a range of
+1.5° to +4.5° C.,
of global warming,
from a doubling
of atmospheric CO2.
No one actually knows
how much warming
is natural, and how much
is caused by CO2.
As a worst case estimate,
we can assume all global
warming is caused by CO2.
That worst
case estimate
suggests CO2
warms LESS
than the
United Nations'
estimated
warming range
(above).
Climate models
don't “prove”
that humans
are responsible
for global warming.
They merely assume
there are no natural
causes of warming,
ignoring 4.5 billion
years of natural
climate change.
Then the models
predict 2x to 3x
the warming that
actually happens.
Climate science
is far from being
"settled".
We do know the
climate is more
pleasant after
325 years of
global warming.
We also know
claims that
future global
warming will
be a crisis,
are nothing more
than a wild guess.
A wild guess
climate change
prediction
doesn't mean much
after over 30 years
of consistently wrong
climate predictions !
How many decades
of wrong predictions
are needed before
we stop taking climate
predictions seriously ?