The Sixth Assessment Report consists of contributions from each of the three IPCC Working Groups and a Synthesis Report (SYR), which integrates the Working Group contributions and the Special Reports produced in the cycle.

The meeting to draft the outline of the Sixth Assessment Report took place in Addis Ababa (Ethiopia) in May 2017. The draft outlines were approved by the 46th Session of the Panel in September 2017. The approved outline for the Working Group I contribution is here

The First Order Draft of the Working Group I contribution to AR6 underwent an expert review (29 April – 23 June 2019). The Second Order Draft was reviewed by governments and experts from 2 March 2020. It was initially scheduled to end on 26 April, but closed on 5 June. Between 4 May to 20 June 2021, the final draft of the Working Group I contribution was circulated to governments for comment on the Summary for Policymakers in preparation for the 14^th Session of Working Group I and 54^th Session of the IPCC.

The full list of Authors and Review Editors for the Working Group I contribution by chapter is available here

• Press Release: Selection of Authors for IPCC Sixth Assessment Report
• Press Release: Call for nomination of authors
• Leaflet: Nomination of authors for AR6

Lead Author Meetings

• First Lead Author Meeting: Guangzhou, China, 25 – 29 June 2018
• Second Lead Author Meeting: Vancouver, Canada, 7 – 12 January 2019
• Third Lead Author Meeting: Toulouse, France, 26 – 31 August 2019
• Fourth Lead Author Meeting: Virtual, 15 – 19 February 2021

Information on the review process and the scoping process that preceded it is available here.