On Feb 26, 9:41*am, Graham P Davis wrote:


Another comparison I've done with graphs of sunspot activity and global
temperatures shows little correlation. During the rise in global
temperature from 1890-1940, sunspots were below the long-term average
until about 1935. During the slight dip in temperatures from 1940 to
1970, sunspot activity was high and reached a record level in the cycle
that peaked in the late 50s.

Isn't the problem with using 1890 as the beginning of a long term rise
in global average temperatures, that the first years may have been
artificially low due to the after effects of the Krakatoa eruption in
1883?