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All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.
"Further emissions of greenhouse gases will cause further global warming. The Arctic will warm most rapidly and the land will warm more than the ocean. There will be more hotter and fewer cold days. Mid-latitude areas that currently experience high rainfall will get more. Sea levels will continue to rise and snow and ice will melt back. If we follow the highest scenario of future greenhouse gases, the Arctic is expected to be ice-free before the middle of the 21st century. “Avoiding 2 degrees of warming since preindustrial times will be very tough. We have already ‘spent’ more than two thirds of the CO2 emissions that we can afford to spend."