IPCC Fourth Assessment Report

IPCC Fourth Assessment Report

Climate Change 2007, the Fourth Assessment Report (AR4) of the United Nations Intergovernmental Panel on Climate Change (IPCC), is the fourth in a series of reports intended to assess scientific, technical and socio-economic information concerning climate change, its potential effects, and options for adaptation and mitigation. The report is the largest and most detailed summary of the climate change situation ever undertaken, produced by thousands of authors, editors, and reviewers from dozens of countries, citing over 6,000 peer-reviewed scientific studies.

It supersedes the Third Assessment Report (2001), and will in turn be superseded by the Fifth Assessment Report (expected in 2014).

The headline findings of the report were: "warming of the climate system is unequivocal", and "most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations."

Read more about IPCC Fourth Assessment Report:  Sections, Working Group I: The Physical Science Basis, Working Group II: Impacts, Adaptation and Vulnerability, Working Group III: Mitigation of Climate Change, Synthesis Report, Criticism

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