global warming

Many scientists, including Allen and Sherwood, have long argued that temperature data were flawed for many reasons such as the change of instrument design over the years. “These systems were never designed for measuring climate change,” said Sherwood. However, some global warming skeptics had argued that weather balloon temperatures were accurate—and models that predicted global [...]

The language of science, like that of the United Nations, is by nature cautious and measured. That makes the dire tone of the just-released final report from the fourth assessment of the U.N.’s Intergovernmental Panel on Climate Change (IPCC), a network of thousands of international scientists, all the more striking. Global warming is “unequivocal.” Climate [...]