Reply To: Bill Gates

[Viking Coder]

Brian H wrote: It fails the reasonableness test on many, many levels.

Your, possibly willful, lack of understanding does not refute the accumulated scientific knowledge. The theory of evolution through natural selection fails the reasonableness test of creationists on many, many levels.

Brian H wrote: What CO2 emissions caused the warmth in Greenland circa 900 AD when the Vikings named it?

http://skepticalscience.com/greenland-used-to-be-green.htm

This argument is based on the idea that as climate has changed naturally before, current climate change must be natural also. The obvious flaw in this argument is that the main driver of climate during the Medieval Warm Period (e.g. – solar variations) cannot be causing global warming now.

Brian H wrote: How is it that a vastly more plentiful equivalent molecule, H20, which evaporates into and remains in the atmosphere much more strongly in warm periods, does not overwhelm the quantitatively puny effects of CO2?

I’ve already answered this question for you in two separate threads on this forum. That is the mark of a denier, asking the same question question repeatedly and refusing to acknowledge the answer. Water cycles through the atmosphere relatively quickly, weeks rather than decades.

Brian H wrote: There have been NO declines in CO2 emission over historical times, yet climate swings much wider than anything experienced recently have happened repeatedly.

That is an entirely false statement. The historical temperature swings, which occurred over tens of thousands of years rather than decades, were accompanied in lockstep, offset by a few centuries, by atmospheric CO2 concentration swings and were caused by the Milankovitch Cycles, increasing & decreasing total solar irradiance due to planetary orbital cycles. The CO2 swings were to due decreased & increased oceanic net absorption from the temperature swings and were a passive feedback agent rather than a forcing agent.

your beloved