Richard Muller, the head of the Berkeley Earth Surface Temperature (BEST) project, will publish an op-ed next week in the New York Times summarizing his group’s findings with regard to global temperature trends. From a copy of the op-ed, "Converted Skeptic," circulating on the web:
CALL me a converted skeptic. Three years ago I identified scientific issues that, in my mind, threw doubt on the very existence of global warming. Now, after organizing an intensive research effort involving a dozen scientists, I’ve concluded that global warming is real, that the prior estimates of the rate were correct, and the cause is human.
My turnaround is the result of the careful and objective analysis by the “Berkeley Earth Surface Temperature” team, founded by me and my daughter Elizabeth. Our results show that the average temperature of the Earth’s land has risen by two and a half degrees Fahrenheit over the past 250 years, and one and a half degrees Fahrenheit over the most recent 50 years. Moreover, it appears likely that essentially all of this increase is due to the human emission of greenhouse gases.