Kyoto-Are Americans Eco-Terrorists?

[Andre]

Coal fired plants also emit some radioactive carbon.

Radioactive carbon is generated in the atmosphere under cosmic bombardment:

14N + n => 14C + p The amount of radio carbon in the atmosphere is proportional with the cosmic activity. The radioactive carbon enters the carbon cycle by photosynthesis. Hence green plants are the most radioactive. 14C has a half value time of about 5700 years so the amount in the organisms and fossil remains decays with time. The carbon dating method is based on this phenomenon. Consequently very old fossils like coal get depleted of 14C in time and coal is no longer radio-active in a measuable amount due to 14C.

 

[CharlesP]

The March Scientific American has delivered a double blow to Global Warming skeptics. First they lauded Michael Mann then they published Ruddiman's claim that "Humans stopped the ice age."
Supporting Mann was Gavin Schmidt, of NASA Goddard, complaining of "unjustified attack after unjustified attack."
If Ruddiman is right then he has identified a climate effect several orders of magnitude weaker than the modern industrial emissions.

 

[Andre]

Well, since the MBH99 is countered by a multitude of other proxies the hard core of global warming doesn't know how fast to bury the hockeystick:

http://www.brighton73.freeserve.co.uk/gw/paleo/paleoclimate.htm#1000years

Every global warmer knows that there was a big hockeystick on this page before.

As our clues about the ice ages are likely wrong Ruddiman's trial is irrevelant.

 

[reasonmclucus]

The March Scientific American has delivered a double blow to Global Warming skeptics. First they lauded Michael Mann then they published Ruddiman's claim that "Humans stopped the ice age."
Supporting Mann was Gavin Schmidt, of NASA Goddard, complaining of "unjustified attack after unjustified attack."
If Ruddiman is right then he has identified a climate effect several orders of magnitude weaker than the modern industrial emissions.

I read it and wasn't impressed by the arguments.