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Thursday, August 13, 2020

What causes climate change ?

Global Warming, 
or Climate Change, 
is a divisive 
political issue, 
that is too often 
science-free.

We are told that
one variable determines 
the future climate, so
predicting the future
climate is easy.

We are then given
computer model 
"predictions" that 
have over estimated 
global warming
by 2x to 3x.

And we find out
those models are 
being adjusted
to over estimate 
global warming
even more in 2021 !

We are told a global
average temperature
that no one lives in.

A global average 
temperature 
hides the details
of actual warming
since 1975 -- mainly
in the northern half
of the Northern 
Hemisphere,
mainly in the six coldest
months of the year, 
and mainly at night !

Think of warmer winter
nights in Alaska, rather
than a global average.

We are told the climate 
in the 1700s was perfect,
when it was cooler than 
average, and that warming
since then is bad news, 
when people in past 
centuries actually think 
it was good news.

We are told a climate crisis
is in progress, when we are 
living in the best climate 
in hundreds of years !

We have been told a 
climate crisis is coming
for the past 50 years !

Climate science 
has been highjacked
by politicians, 
environmental 
pressure groups, 
and other leftists.

Climate change
is a fake crisis
that can only be
prevented, 
leftists claim,
by a stronger 
central government,
which is something
leftists have always
wanted ! 


Earth's climate
is always changing. 

‘Climate’ is defined 
as average weather 
over a 30-year period.

The difference between
the current monthly
global average temperature ,
and its 30- year average, 
is the the temperature 
"anomaly".

Anomalies are usually 
shown on a chart in 
tenths of a degree, 
making tiny changes
look large.

When the actual temperature
is shown on a chart,
the changes over 125 years
are barely visible.

The honest global warming
chart on this blog's home
page shows that.  

When using a smart phone
to see this blog,
you will not see 
that chart unless
you use the 
optional "web view"
(if you use web view,
the blog text can
be enlarged for 
very easy reading, 
because of my narrow
paragraph format.)

The surface measurements 
are not evenly distributed 
over the globe, especially
over the oceans, and 
at high latitudes.

Questionable schemes 
are used to extrapolate
 ("infill") sparse data 
to approximate full
global coverage.

Infilled data are 
wild guessed data,
because people 
who are making up
the numbers expect
to see, and want to see, 
lots of global warming.

For land surfaces, 
divided into grids,
most grids include 
infilled numbers, 
and some are 
ONLY infilled
temperature numbers, 
rather than actual 
temperature 
measurements.

The following variables 
are believed to influence
Earth's climate -- the 
importance of each 
variable is not known,
no matter what the
government scientists
claim:

Earth's orbital and 
orientation variations 

Changes in ocean circulation, 
including ENSO, and other
cycles 

Solar irradiance and
solar activity variations 

Cloud and volcanic 
aerosol emissions 
variations

Greenhouse gas emissions 

Land use changes and 
economic growth near
weather stations

Random variations 
of the complex, 
non-linear 
climate system 

Unpredictable catastrophes

Leftist scientists repeatedly 
"adjusting" raw data 
to show more global warming.

Unknown causes 
of climate change.

Note:
The variables above 
are not all independent.