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AR6 Synthesis Report: Climate Change 2022
Year Published2022
Abstract in English

AR6 Synthesis Report (SYR)

The IPCC is currently in its Sixth Assessment cycle, during which the IPCC will produce the Assessment reports of its three working groups, three special reports, a refinement to the methodology report and the Synthesis report.  The Synthesis Report will be the last of the AR6 products, due for release in 2022.

According to IPCC procedures the Synthesis Reports (SYRs) should “synthesise and integrate materials contained within the Assessment Reports and Special Reports” and “should be written in a non-technical style suitable for policymakers and address a broad range of policy-relevant but policy-neutral questions approved by the Panel”.  They are composed of two sections, a Summary for Policymakers (SPM) of 5 to 10 pages and a longer report of 30 to 50 pages.

The writing of AR6 SYR will be based on the content of the three Working Groups Assessment Reports: WG1 – The Physical Science Basis, WG2 – Impacts, Adaptation and Vulnerability, WG3 – Mitigation of Climate change, and the three Special Reports: Global Warming of 1.5°C, Climate Change and Land, The Ocean and Cryosphere in a Changing Climate.

It might also take into account issues considered in other global assessment (such as Intergovernmental Platform for Biodiversity and Ecosystem Services and UN Environment’s Sixth Global Environment Outlook),  if those issues are also addressed in the above-mentioned reports.

AR6 SYR will be finalized in the first half of 2022 in time for the first global stocktake under the Paris Agreement.


Scoping Process

Scoping of the Synthesis Report of the Sixth Assessment Report

A scoping meeting was held in Singapore from 21 to 23 October 2019 at the Resorts World Conventions Centre.

A Scientific Steering Committee for the AR6 SYR scoping meeting was constituted during the 56th meeting of the Bureau in Geneva in March 2019. It is composed of the IPCC Chair and Vice-Chairs, the Co-Chairs of the Working Groups and of the Task Force on National Greenhouse Gas Inventories and two Vice-Chairs per Working Group.

An invitation to take part in a scoping meeting survey  was sent early June to governments, observer organizations, IPCC Bureau members as well as to AR6 Coordinating Lead Authors and Lead Authors  and the Core Writing Team of the AR5 Synthesis Report , with a deadline for responses set for 8 July 2019.

Fifteen responses from governments were received, three from observer organizations and a hundred and thirty from authors and Bureau members. The answers should guided the scoping meeting participants on the development of an outline for the SYR.

A call for nominations of experts to participate in this meeting was sent to governments, observer organizations and IPCC Bureau members on 1 May 2019, with a deadline was of 2 June 2019. A total of 546 nominations were received and 80 experts from 38 countries were selected.

According to the IPCC procedures, the Chair of the IPCC in consultation with the Working Group Co-Chairs will selected the Scoping meeting participants.

Timeline for the Singapore scoping meeting

After the scoping meeting the Core Writing Team of the synthesis report will be constituted.

Scoping of the Working Group contributions to the Sixth Assessment Report 

A scoping meeting took place in Addis Ababa (Ethiopia) from 1 to 5 May 2017 where a first draft of the outlines of the WGs reports and five broad elements that will guide the writing of the SYR were developed.

A pre-scoping survey was sent in September 2016 by the Secretariat to governments and observer organizations, the responses were synthesized allowing the scoping meeting participants to identify the policy relevant questions and the scientific and technical topics to be addressed in the SYR (see the Chair’s Vision Paper).

In Montreal, during the Forty-sixth Session of the IPCC from 6 to 10 September 2017, the draft outlines were approved and the five broad elements were presented as follows:

  1. Global Stocktake: assessing scientific information relevant to the state and trends of the climate system, observed impacts, and human fingerprint; and scientific information relevant for tracking progress towards achieving the purpose of the Paris Agreement and its long-term goals, which could include mitigation and adaptation; and the finance flows consistent with a pathway towards low greenhouse gas emissions and climate-resilient development.
  2. Interaction among emissions, climate, risks and development pathways: characteristics of mitigation pathways; remaining carbon budget consistent with long-term temperature limits, including 1.5 ºC and 2 ºC; non-CO2 and short-lived climate forcers; emissions and climate scenarios and development pathways; climate impacts and risks arising from climate change and extremes at various spatial and temporal scales; including the near-term; long-term changes and commitment, including relative sea-level rise; abrupt changes; rate of change and how it varies through time; irreducible uncertainties at local and regional scales; distributed aggregated risks, depending on different mitigation levels and development pathways; implication of delayed action.
  3. Economic and social costs and benefits of mitigation and adaptation in the context of development pathways: including avoided impacts, synergies, co-benefits and tradeoffs with sustainable development, including relevant SDGs; limits to adaptation; residual impacts and risks; implications of delayed action.
  4. Adaptation and mitigation actions in the context of sustainable development: assessing current and emerging mitigation and adaptation options, opportunities for technological and social transformation; strengthening resilience; investment and infrastructure planning for long-term climate resilient development; regional (including urban and rural areas); sectoral and actor-specific perspectives; institutions, policies and governance; enabling innovation and transitions at various scales; linking innovation and technology transfer and diffusion to emissions reduction and adaptation outcomes.
  5. Finance and means of support: consistent with a pathway towards low greenhouse gas emissions and climate resilient development, including technology development, diffusion and transfer.




Quick links

Strategic planning schedule 2019 (updated: 17 May 2019)

AR6 Chair’s Vision Paper

Approved outlines


Authors and Review editors

Source PlatformIntergovernmental Panel on Climate Change
Document Type科技报告
Recommended Citation
GB/T 7714
admin. AR6 Synthesis Report: Climate Change 2022,2022.
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