rightwinger said-Where in any of this does it say global warming doesn't exist? You take one element of a global warming analysis that may be questionable and use it to claim all evidence of global warming is now invalid
Typical rightwing flat earth logic
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nobody is saying that there has been no overall warming since the Little Ice Age. nobody is saying that mankind has not burned fossil fuels and put CO2 into the air.
the main points that 'climate skeptics' are presenting are:
-- climate reconstructions from proxies are inherently unreliable with large error bars. Mann's Hockey Stick Graph gives estimates of the earth's temperature in tenths of a degree for up to 1000 years ago. exaggerated claims, especially when his first graph did not even produce the known Medieval Warm Period or the Little Ice Age.
-- computer models that only incorporate a small number of known climate factors and no unknown (obviously!) factors. while the final stage graph of temperatures corresponds reasonably well with recent data, the actual models are dramatically wrong in predicting where in the atmosphere the warming is taking place. A stopped clock is right twice a day, especially when you know what temperature, oops I mean what time you want.
-- physical measurements of temperature over the last 100-150 years has shown rises and dips, with high temps in the 30's being roughly equal to the late 90's-00s. That is for RAW data. increasingly over the last 15 years more and more 'adjustments' have been added to the raw data, always driving the average up. skeptics want open access to the raw data and the methodologies used to make the adjustments. often the adjustments are as large as the so-called temperature increases that are used to invoke catastrophic global warming.
gtg, maybe I'll add more later