Climate Change 2021/2022: IPCC Sixth Assessment Report

Several IIASA scientists have been invited to contribute to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6).

© Alexis Merlaud |

© Alexis Merlaud |

The report will be a comprehensive assessment of the science related to climate change and will inform policymakers, international climate negotiators and other stakeholders around the world. In total, 721 authors have been selected from 2,858 experts representing 105 countries, who were nominated by governments and IPCC observer organizations.

Three Working Groups have been set up to compile the report. Working Group I is responsible for the physical science basis, Working Group II looks at impacts, adaptation and vulnerability and Working Group III covers mitigation of climate change.

The authors will now begin to review the existing literature on climate change and prepare drafts. The three working groups will finalize their contributions in 2021, and a final synthesis report integrating all the findings will be published in 2022.

Working Group I: Physical science basis

Lead Authors

Joeri Rogelj: Chapter 5 - Global carbon and other biogeochemical cycles and feedbacks

Zbigniew Klimont: Chapter 6 - Short-lived climate forcers

Contributing Author:

Pallav Purohit: Chapter 6 - Short-lived climate forcers.

Working Group II: Impacts, adaptation and vulnerability

Lead Author

Reinhard Mechler: Chapter 17 - Decision-making options for managing risk

Working Group III: Mitigation of climate change

Coordinating Lead Author

Keywan Riahi: Chapter 3 - Mitigation pathways compatible with long-term goals

Lead Authors

Shonali Pachauri: Chapter 2 - Emissions trends and drivers

Volker Krey: Chapter 4 - Mitigation and development pathways in the near-to mid-term

Arnulf Grubler: Chapter 5 - Demand, services and social aspects of mitigation

Petr Havlik: Chapter 7 - Agriculture, Forestry, and Other Land Uses (AFOLU)

Contributing Authors

Caroline Zimm: Chapter 5 - Demand, services and social aspects of mitigation

Paul Kishimoto - Chapter 10 - Transport

Chapter Scientist

Edward Byers - Chapter 3 - Mitigation pathways compatible with long-term goals

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Last edited: 01 September 2021

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