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IPCC Fourth Assessment Report

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Working groups

The reports by the three Working Groups provide a comprehensive and up-to-date assessment by many hundreds of climate scientists worldwide of the current state of knowledge on climate change.

  • Working Group I The Physical Science Basis of Climate Change
  • Working Group II Impacts, Adaptation and Vulnerability
  • Working Group III Mitigation of Climate Change

The management of the Working Group II report is carried out by the Technical Support Unit in the Met Office Hadley Centre.

Read the reports on the IPCC website

The Intergovernmental Panel on Climate Change (IPCC) was established by the World Meteorological Organization (WMO) and United Nations Environment Programme (UNEP) to improve the understanding of climate change, its potential impacts and options for adaptation and mitigation.

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Synthesis report and PM's announcement

As the single biggest contributor to the report from the UK, the Met Office is ideally placed to help you understand what the report is saying. We offer advice and information on interpreting the science and its impacts.

Working Group I reports on the Physical Science Basis of Climate Change. This report addresses the key areas of climate change research and shows that the warming of the climate system is unequivocal.

Working Group II examines the future likely impacts of climate change on the planet, its vulnerability and capacity to adapt. The content of the report is wide-ranging, outlining predicted impacts for all continents and identifying major systems with specific detail.

As the single biggest contributor to the report from the UK, the Met Office is ideally placed to help you understand what the report is saying. We offer advice and information on interpreting the science and its impacts.

"The challenge is that climate change is not linear, the planet and all of us face uncertain consequences. We need to make sense of this challenge - not to scare or alarm but to present with scientific validity the probabilities of what might happen. The Met Office has the ability, the reputation and the responsibility to do this"
Robert Napier, Met Office Chairman