On Feb 17, 10:30 am, Kunt Loadturd the returd Loadturd the
wrote:
James was whining again because:





Roger Coppock replied:

CO2 or Sunspots: Statistical Correlation Chooses

Statistical correlation is a powerful technique with
very many uses. It produces "R squared" a measure of
whether two series of measures trend together.

(Those who are new to statistical correlation and
"R squared" will find a tutorial on the subject he

http://mathworld.wolfram.com/Correlation.html

http://mathworld.wolfram.com/Correla...efficient.html

Item 20 in the above shows R squared for several graphed
relationships.)

When applied to a time series of global mean surface
temperatures and data from prospective global warming
causes covering the same time period, correlation can
help locate the cause of the observed global warming.
Low "R squared" values, those near zero, can, by
themselves, totally rule out a prospective cause.
High "R squared" values indicate that a prospective
cause is very likely, but do not, by themselves,
'prove' something caused the warming. (Experimental
science rarely 'proves' something like a mathematical
proof does.)

Below are directly observed data for global mean surface
temperature, CO2 concentration, and sunspots for the last
50 years. This is as long as the longest directly
observed record of atmospheric CO2 concentration.

The R^2 value for the correlation of CO2 and planetary
surface temperature is 0.78. The simple rising
line showing heating for increasing CO2 explains a
lot of the variance in the global mean temperature.
The relationship between CO2 and global temperature
is very strong and the anthropogenic greenhouse gas
radiative forcing theory is well supported by these
data.

The R^2 value for sunspots and and planetary
surface temperature is very near zero. These data
clearly do not support any relationship between
sunspot numbers and global mean surface temperature
over the last 50 years. It is very unlikely that
sunspots have anything to do with the current
global warming.

This test applies very easily to all other claims for
global warming causes. It will quickly separate the
wheat from the chaff.

Behold! Roger's own hockey stick!

who cares?

--Gas bag from where the steers and queers reside indeed..

Loadturd the returd...how many sockpuppets you using today, ****tard?