Climate Change 2013:
The Physical Science Basis

IPCC Working Group I Contribution to AR5

The Twelfth Session of Working Group I (WGI-12) was held from 23 to 26 September 2013 in Stockholm, Sweden. At the Session, the Summary for Policymakers (SPM) of the Working Group I contribution to the IPCC Fifth Assessment Report (WGI AR5) was approved and the underlying scientific and technical assessment accepted.
Summary For Policymakers PDF - 28 Pages - 2.8 MB Full WGI AR5 Report PDF - 1535 Pages - 375 MB

Summary Volume (SPM, TS & FAQs) Translations into UN languages

Summary Volume (SPM, TS & FAQs) Translations into other languages

SPM Translations into UN languages

SPM Translations into other languages

Video on the Working Group I Contribution

The IPCC has produced a video on its Fifth Assessment Report (AR5). Part 1 of this documentary presents the Working Group I contribution to AR5 and provides insights into the making of the report and it's main findings. Working Group I assesses the physical scientific aspects of the climate system and climate change.

Subtitled versions are available in the other five official UN languages
Arabic, Chinese, French, Russian, and Spanish.

A version with German subtitles is also available.

Part 2 -- Working Group II: Impacts, Adaptation, and Vulnerability
Part 3 -- Working Group III: Mitigation of Climate Change
Part 4 -- Synthesis Report


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For more details visit the Background pages