Grant wrote:

Roger Coppock wrote:
http://co2science.org/ushcn/ftable.htm) However, the positive
slope regression lines of global warming in temperature data series
have been more than 99% certain for over a half-century now.
(The positive correlation from 1880 to 1954 in the GISS land and
sea data set is about 99.9999999999% certain, with 73 degrees of
freedom and F = 75.92.)

The above numbers assume that the values for successive years may be
considered independent. The actual number of degrees of freedom should
be estimated from the lag-one autocorrelation of the data set (that
auto-correlation is almost certainly 0).

Then please take us step-by-step through the lag-one auto-correlation
of the data set and produce your estimate of the number of degrees of
freedom. The URL to the data set was listed in my original post, the
part you snipped.



Second, while the trend in the data set itself might be highly certain,
there remains some controversy over whether the data set accurately
reflects the actual trend in global temperature, or whether the trend is
an artifact of the measurements themselves (e.g. heat island effect, etc.)

As the snipped part of my original post said, the land data used were
corrected for the Urban Heat Island effect; the sea data did not need
to be.



I say this as one who believes that the globe is probably getting
warmer. But I want any claims to have *proven* this to be able to
withstand close scrutiny.

--

"One who joyfully guards his mind
And fears his own confusion
Can not fall.
He has found his way to peace."

-- Buddha, in the "Pali Dhammapada,"
~5th century BCE


-.-. --.- Roger Coppock )


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