Anyone seen Michael Crichton’s new “State of Fear”? The man who brought dinosaurs back to life now disputes the commonly held belief that global warming is a consequence of increased carbon dioxide emissions produced by the industrialized world.
I’ve never really looked at the evidence supporting the anthropocentric theory of global warming, so I took a look around and found what I hope are a few unbiased sources:
My take away?
1) There is a definite warming trend in global surface measurements observable
over the last 100 years with a pronounced increase in the last 2 decades. Unfortunately, these time periods coincide with refinements in measurement tools, making comparison of measurements difficult, especially with a precision of ~1 C. Satellite data mesuring troposhere temperature fails to recapitulate the warming trend indicated by surface temperature measurements. Which measurement do you think is more sensitive? Accurate? Prone to bias?
2) There appears to be a rough correlation between CO2 and Temperature readings over the last 250 thousand years, however the causative factor is not clearly established. Increased CO2 may cause increased temperature, but it seems equally plausible that increased temperature enhances bioactivity, which may in turn produce increased CO2.
3) If you read enough forum discussions regarding global warming, you’ll find the Truth: Your Life as a Human Test Subject. And here I thought contrails were the consequence of condensation of water vapor exhaust from jet engines. Who knew?
All in all, the data supporting anthropocentric global warming are not terribly compelling to me. Of course, I may be guilty of selectively acknlowedging data that supports my underlying biases. Discuss…