The Fifth Assessment Report of the IPCC

The Fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change (IPCC) was published in 2014 (the next Assessment Report, AR6 will be published in 2022).

Working Group I, Working Group II, and Working Group III reports were approved in 2013 and 2014. The Synthesis Report was finalized in October 2014.

Working Group I Report "Climate Change 2013: The Physical Science Basis"

The Working Group I contribution considers past and future changes in the climate system, such as temperature of land and ocean, precipitation, ice and glaciers, sea level rise, atmospheric concentrations of greenhouse gas, ocean acidification, and energy budget. It also evaluates climate models, response to the climate system, human influence to climate change, and committed climate change.

A SBSTA-IPCC special event WGI Contribution to AR5 was held on 12 November 2013.

Working Group II Report "Climate Change 2014: Impacts, Adaptation, and Vulnerability"

The Working Group II contribution considers impacts in natural and human systems on all continents and across the oceans caused by changes in climate in recent decades. The report evaluates how patterns of risks and potential benefits are shifting due to climate change, and looks at how impacts and risks related to climate change can be reduced and managed through adaptation and mitigation. Information is considered by sectors (water resources; ecosystems; food & forests; coastal systems; industry; human health) and regions.

A SBSTA-IPCC special event WGII Contribution to AR5 was held on 4 June 2014.

Working Group III Report "Climate Change 2014: Mitigation of Climate Change"

The Working Group III contribution assesses the scientific, technological, environmental, economic and social aspects of mitigation. It assesses trends in greenhouse gas emissions, mitigation policies and long-term mitigation pathways with various sectors, which comprise energy supply, transport, buildings, industry, agriculture (land use), and human settlements.  

A SBSTA-IPCC special event WGIII Contribution to AR5 was held on 6 June 2014.

Synthesis Report of AR5:"Synthesis Report"

The Synthesis Report distils and integrates the findings of the three working group contributions to the IPCC Fifth Assessment Report -- the most comprehensive assessment of climate change yet undertaken, produced by hundreds of scientists -- as well as the two Special Reports produced during this cycle.

A SBSTA-IPCC special event of the Synthesis Report of AR5 was held on 2 December 2014.