Jesus. What a load. Lucky for us tobacco lobby scientists are around.
And the wait continues for a single piece of observed, measured evidence which supports the AGW hypothesis over natural variability....got any?
Didn't think so.
The claim that we have accelerated effects that coincide with the industrial revolution is what they always fall back on.
But there is no proxy study which has resolution sufficient to make any such claim for a period of less than a few hundred years. The proxy studies with the highest resolution are those derived from ice cores taken above the arctic and antarctic circle...they show periods of climate change in which temperatures rose and fell at a far faster rate than anything we have experienced and those changes were far greater than anything we have seen.
Of course believers point out that those studies only reflect the arctic...but then, climate science has been telling us for decades that the arctic and antarctic regions are the canaries in the coal mine and what happens in those regions follows to the rest of the globe...and proxy studies from all over the globe have in large part shown those ice core studies to have been precursors for global changes.
However volcanologists are just now coming to the conclusion that a greater period of previously undetected volcanic activity also spans that stretch of years. So once again it's a matter for investigation...not academic snobbery.
Jo
They are also coming to learn that volcanoes are putting out orders of magnitude more CO2 than was previously thought. The old numbers regarding volcanic CO2 output were only looking at about 6 to 8 volcanoes known to be active. They are learning now that there are literally hundreds of thousands of active undersea volcanoes which for the most part have been completely ignored. As the study progresses, I will not be in the least surprised to find that mankind's CO2 production is a mere fraction of the amount of CO2 being produced by volcanoes alone...never mind such sources as termites for example which produce more than twice the amount of CO2 that we do.
Of course as study progresses, the climate sensitivity to CO2 keeps moving towards zero..2 decades ago, climate sensitivity was thought to be 6 degrees or more...then a decade ago it was reduced by half...now studies are pushing hard to rationally claim even 1 degree of climate sensitivity to CO2...in another decade that number will be indistinguishable from zero.