... 0.5 degrees C since the late 19th century (within a range of 0.3 and 0.6 degrees C). The IPCC used this and other data gathered from fossil records, ice core drillings, tree ring analyses, marine sediment cores and the like to develop global weather models designed to account for past global temperature changes and predict future temperature scenarios. Prominent among those predictions was ... . Furthermore, these studies show that there was actually a cooling period from 1940 through 1970 during which global mean temperatures actually declined. The ICPP's climate models failed to accura...

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• Grade Level: Undergraduate