“There is a secular warming trend at least since 1800 (and possibly as long as 400 years), that cannot be explained by CO2, and is only partly explained by volcanic eruptions.”
Judith Curry writes:
“There is a secular warming trend at least since 1800 (and possibly as long as 400 years), that cannot be explained by CO2, and is only partly explained by volcanic eruptions.”
Judith Curry writes:
Whenever I see mention of ‘since such-and-such a date’ in the context of a climatological discussion, I immediately recognize that I am dealing with bias.
Currently we are in transition from a climate that was almost perfectly independent of anthropogenic influences to one that *may* be measurably affected by human activity.
There is no single moment when the factors influencing climate cease to be solely natural and start to be anthropogenic.
The climate factors operative in 1951 and later are the same as those active in 1949 and before, with the only difference being an almost imperceptible shift in emphasis.
To cherry-pick data after a given date and dismiss whatever data came before that date is not only disingenuous and mendacious, it reveals willful ignorance.