Sixth Assessment Report - IPCC

Synthesis Report

During the sixth assessment cycle ( October 2015 to July 2023) the IPCC produced the Sixth Assessment Report (AR6) with contributions by its three Working Groups and a Synthesis Report, three Special Reports, and a refinement to its latest Methodology Report.

The Working Group I contribution to the Sixth Assessment Report, Climate Change 2021: The Physical Science Basis was released on 9 August 2021. 

The Working Group II contribution, Climate Change 2022: Impacts, Adaptation and Vulnerability was released on 28 February 2022.

The Working Group III contribution , Climate Change 2022: Mitigation of Climate Change was released on 4 April 2022.

The Synthesis Report , Climate Change 2023: Synthesis Report was released on 20 March 2023 to inform the 2023 Global Stocktake under the United Nations Framework Convention on Climate Change.

IPCC’s seventh assessment cycle began in July 2023 with the election of the new IPCC and Task Force Bureaus.

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Resources:

• Sixth Assessment Report factsheet 

IPCC Factsheets

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• Timeline  [English | Arabic | Chinese |French| Russian |Spanish]

Clear Grid List

Synthesis Report

AR6 Synthesis Report: Climate Change 2023

March 2023

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Report

AR6 Climate Change 2022: Mitigation of Climate Change

April 2022

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Working Group Report

AR6 Climate Change 2022: Impacts, Adaptation and Vulnerability

February 2022

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Report

AR6 Climate Change 2021: The Physical Science Basis

August 2021

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Reports

Special and Methodology Reports

• 2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers
• Special Report on Climate Change and Cities
• 2027 IPCC Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture, Utilization, and Storage for National Greenhouse Gas Inventories (Additional guidance)
• Global Warming of 1.5°C
• Climate Change and Land
• 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories
• The Ocean and Cryosphere in a Changing Climate

Sixth Assessment Report

• AR6 Synthesis Report: Climate Change 2023
• AR6 Climate Change 2022: Impacts, Adaptation and Vulnerability
• AR6 Climate Change 2022: Mitigation of Climate Change
• AR6 Climate Change 2021: The Physical Science Basis

Fifth Assessment Report

• AR5 Synthesis Report: Climate Change 2014
• AR5 Climate Change 2013: The Physical Science Basis
• AR5 Climate Change 2014: Impacts, Adaptation, and Vulnerability
• AR5 Climate Change 2014: Mitigation of Climate Change

Working Groups

Working Group I

• About
• Reports
• Resources
• Activities
• News
• Co-Chairs
• Vice Chairs
• TSU Staff
• Contact

Working Group II

• About
• Reports
• Activities
• News
• Co-Chairs
• Vice-Chairs
• TSU Staff
• Contact

Working Group III

• About
• Reports
• Activities
• News
• Co-Chairs
• Vice-Chairs
• TSU Staff
• Contact

TFI

• About
• Methodology Reports
• Activities
• IPCC Inventory software
• Emission Factor Database
• TFI Governance
• TFB Co-Chairs
• TFB Members
• TSU Staff
• Contact

Activities

Press Release

IPCC opens registration of experts to review the first draft of the Methodology Report on Inventories for Short-lived Climate Forcers

GENEVA, December 5 – The Intergovernmental Panel on Climate Change (IPCC) opened this week registration for experts to serve as …

December 2025

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Speeches

Chair’s remarks – First Lead Author Meeting, Working Groups I, II & III

1 December 2025 CHECK AGAINST DELIVERY Madame la Ministre, Monsieur le Maire, distinguished colleagues, ladies and gentlemen, Thank you for …

December 2025

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Press Release

IPCC authors meet in Paris to begin drafting the Seventh Assessment Report

Paris, Dec 1 – More than six hundred experts appointed to the three Working Groups of the Intergovernmental Panel on …

December 2025

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