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originally posted by: syrinx high priest
originally posted by: Nathan-D
You said there was a contradiction. So, stop wasting my time and point out where you think the contradiction is in what I have said.
"have changed"
"not the main cause"
seems like quibbling on semantics eh ?
and of course it is the main cause. going back 250 years the data for the CO2 and the temps match. until there is a better match it has to be considered the reason.
originally posted by: Nathan-D
originally posted by: syrinx high priest
originally posted by: Nathan-D
You said there was a contradiction. So, stop wasting my time and point out where you think the contradiction is in what I have said.
"have changed"
"not the main cause"
seems like quibbling on semantics eh ?
and of course it is the main cause. going back 250 years the data for the CO2 and the temps match. until there is a better match it has to be considered the reason.
I am starting to feel that I have somehow slipped into an alternate universe where the rules of common speech are subtly different to the ones I know and understand. Syrinx appears to be arguing that humans increasing atmospheric CO2 levels and the CO2 increase not being the main cause of global warming are somehow incompatible and contradictory. This is why I stopped commenting on ATS. The level of stupidity here is off the scale! Syrinx then goes on to say ‘Of course it is the main cause. Going back 250 years the data and the temperatures match’. Please burn into your memory the fundamental scientific principle that ‘correlation does not prove a cause’, which renders your attempt to prove CO2 is the main cause of temperature changes totally irrelevant and a complete red-herring. In fact if one looks at the CO2 and temperature data over the last 60 years, you will see that CO2 changes lag corresponding temperature changes. So, pray tell me, how can CO2 changes be causing the temperature changes, when the CO2 changes are lagging the temperature changes? It is equivalent to someone saying ‘Cancer causes smoking’.
The annual and decadal land surface temperature from the BerkeleyEarth average, compared to a linear combination of volcanic sulfate emissions and the natural logarithm of CO2. It is observed that the large negative excursions in the early temperature records are likely to be explained by exceptional volcanic activity at this time. Similarly, the upward trend is likely to be an indication of anthropogenic changes. The grey area is the 95% confidence interval.
Richard Muller, Founder and Scientific Director of Berkeley Earth, notes “Much to my surprise, b y far the best match was to the record of atmospheric carbon dioxide, measured from atmospheric samples and air trapped in polar ice . ” He emphasizes that the match between the data and the theory do esn’t prove that carbon dioxide is responsible for the warming, but the good fit makes it the strongest contender. “ T o be considered seriously, an y alternative explanation must match the data at least as well as does carbon dioxide.” In its 2007 report the IPCC concluded only that “ most ” of the warming of the past 50 years could be attributed to humans. It was possible, according to the IPCC, that increased solar activity could have contributed to warming prior to 1956 . Berkeley Earth analyzed about 5 times more station records than were used in previous analyses, and this expanded data base along with its new statistical approach allowed Berkeley Earth to go about 100 years farther back in time than previous studies. By doing so, the Berkeley Earth team was able to conclude that over 25 0 years, the contribution of solar activity to global warming is negligible. Some of the scientists on the Berkeley Earth team admit surprise that t he new analysis has shown such clear agreement between global land -‐ temperature rise and hum an -‐ caused gree nhouse gases. “I was not expecting this,” says Richard Muller, “but as a scientist , I feel it is my duty to let the evidence change my mi nd .”
take 45 minutes to check out Dr. Muellers study. I found it very credible as a former skeptic examining the data to eliminate bias and poor quality stations testified before congress that climate change is real and man-made
you didn't offer an alternative reason, I suspect because you don't have one
originally posted by: Greven
a reply to: Nathan-D
CO2 has been trending steadily upwards on a yearly average, so it's funny to see it declining in your graph. Oh, and using a series that ended several years ago.
originally posted by: Nathan-D
originally posted by: Greven
a reply to: Nathan-D
CO2 has been trending steadily upwards on a yearly average, so it's funny to see it declining in your graph. Oh, and using a series that ended several years ago.
What adjusted values are you referring to? The CO2 increase is not just a straight line as it appears in your graph. Your graph shows the smoothed CO2 increase whereas my graph shows the unsmoothed CO2 increase.
originally posted by: Nathan-D
originally posted by: TiredofControlFreaks
ok just a question - doens't matter anyway. It has been well established anyway - CO2 lags temperatures. Your graph is really irrelelent to the issue being discussed.