A broad-based new study of climate change has confirmed earlier evidence of a global rise in average land temperatures of 1 degree Centigrade since the 1950′s. However, it draws no conclusions as to whether this warming is man-made.
The Berkeley Earth Surface Temperature study, released on Thursday, analyzed data from fifteen different sources, some going back more than two centuries, to answer doubts raised by climate change skeptics in response to earlier studies.
Previous studies had been able to rule out certain sources of possible error, including the urban heat island effect and poor station quality, but they had been based on a limited number of data sources, and skeptics had continued to claim that the results might have been skewed as a result. The new study, which includes almost all available data, is intended to counter that claim.
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