The IPCC is currently preparing its Sixth Assessment Report (AR6). During this cycle, the Panel has produced three Special Reports, a Methodology Report on national greenhouse gas inventories and is now working on the Sixth Assessment Report (AR6). More information on the sixth assessment cycle is available here.
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 (AR6) 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 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. Read more.
The Working Group I contribution is expected to be considered at the 54th Session of the IPCC which is scheduled to take place in the 14 days from 26 July 2021. The report will be released, subject to approval and acceptance by the Panel, on or around 9 August. The modalities for this meeting are still under consideration. Read more
Timeline for the Working Group I contribution to the Sixth Assessment Report ( updated: 15 June 2020)
On 15 September 2017, a call for nomination of authors was sent to governments, observer organizations and IPCC Bureau Members. They were asked to submit their nominations via their focal point before Friday 27 October 2017 (midnight GMT +1).
The Working Group I Bureau met on 29 January to select the author teams. The IPCC Bureau met on 30 January 2018 to agree on the selected list of authors.
The full list of Authors and Review Editors for the Working Group I contribution by chapter is available here
Lead Author Meetings
All IPCC reports undergo two stages of review. A First-Order Draft is reviewed by experts. Following the expert review, authors develop a Second-Order Draft based on the comments received. This draft then undergoes a second review by both governments and experts. Authors will prepare a Final Draft based on the comments received during the second review. The Final Draft is distributed to governments at the time of the final government review of the Summary for Policymakers.
The First-Order Draft of the Working Group I contribution to AR6 has undergone 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 2020 due to changes to the schedule resulting from the COVID-19 pandemic.
The scoping meeting for the Sixth Assessment Report (AR6) took place in Addis Ababa (Ethiopia) from 1 to 5 May 2017. The draft outlines were approved by the Panel when it met in September 2017
The approved outline of the Working Group I contribution to the Sixth Assessment Report is available here
A call for nomination of experts to attend the scoping meeting was issued to governments, observer organizations and IPCC bureau members. They were requested to submit their nominations via their focal points before midnight (CET) on 31 October 2016. The deadline was later extended to Monday 14 November 2016
In order to determine robust areas of consideration, participants in the Scoping Meeting had a broad understanding of climate change and related issues, and collectively had expertise in the following areas:
Working Group I
Cross-cutting areas of expertise
On 21 September 2016, the IPCC Secretariat sent out a pre-scoping questionnaire to governments and observer organizations to identify policy relevant questions and scientific and technical topics to be addressed in the Sixth Assessment Report (deadline: 30 November 2016, extended to 12 December 2016). The responses received were synthesized and made available to the participants of the AR6 Scoping Meeting and the Panel.