I already addressed this and you have added nothing new here.Alex123 wrote:It says that "for 650,000, atmospheric CO2 levels has never been above this line [300ppm] ...until now".Buckwheat wrote:[This entire link is worth reading, but I will quote the especially relevant point:
http://climate.nasa.gov/evidence/
Alex: And for MILLIONS of years CO2 levels were above 1,000ppm. During Cambrian it reached almost 7,000ppm, and I've heard that even during Ordovician there was up to 7,000ppm of CO2 for a shorter period of time.
The heat-trapping nature of carbon dioxide and other gases was demonstrated in the mid-19th century.2Their ability to affect the transfer of infrared energy through the atmosphere is the scientific basis of many JPL-designed instruments, such as AIRS. Increased levels of greenhouse gases must cause the Earth to warm in response.
No argument is based on mid-19th century science. The mid-19th century is when scientists first got an understanding of the heat trapping nature of greenhouse gasses, but it has been the subject of study every since. The quote in question goes on to say that JPL and NASA have had to account for those effects in many instruments, including AIRS, launched in 2002. That is rather modern, don't you think?Alex123 wrote:So is AGW main argument based on Mid 19th century? I prefer Science closer to the end of 20th century when we have Ice Core data.
http://en.wikipedia.org/wiki/Atmospheri ... ed_Sounder
Um, Newton's Law's of Physics are pretty old. Did you stop believing in those, as well?
I already addressed this, you are adding nothing new.Alex123 wrote:Even IF CO2 has capability of trapping the heat (lots of data suggests that CO2 rise LAGS temperature rise by as much as 800-1200 years) ice age can still occur at levels of >3,000ppm like it did in late Ordovician.
Yes, I know the "skeptical science" response that solar activity was lower... That to me is an admission that CO2 at best is not THE sole cause of temperature rise, and that astronomical events can over ride high CO2. But if we take scientific article (with many sources) that I've posted here CO2 seems to be the EFFECT of temperature change rather than the cause.
There is no single cause of global climate. It is a complex interaction of multiple forces. Quit accusing me of saying CO2 is the sole source of anything.CO2 didn't initiate warming from past ice ages but it did amplify the warming. In fact, about 90% of the global warming followed the CO2 increase.
We have taken this debate to the point of ridiculous retetition a few times now. How about we agree to disagree?