The Intergovernmental Panel on Climate Change (IPCC) has opened registration for experts to review the First Order Draft of the Working Group I contribution to the Seventh Assessment Report (AR7). This opportunity allows researchers and subject-matter experts worldwide to contribute to one of the world’s most influential scientific assessments on climate change.
The review process is a key part of ensuring that the report reflects the latest, most accurate, and comprehensive scientific understanding of the physical science of climate change.
About the Expert Review
The First Order Draft review focuses on the Working Group I contribution to the Seventh Assessment Report (AR7), which examines the physical science basis of climate change, including observed and projected climate changes, climate processes, feedback mechanisms, and regional climate information.
Expert reviewers play an essential role in strengthening the scientific quality, transparency, credibility, and policy relevance of IPCC assessment reports.
Review Period
- 10 August – 2 October 2026
Registration Deadline
- 25 September 2026 (23:59 CEST)
Who Can Register?
The IPCC invites experts from around the world, including early career researchers, to participate in the review process. Individuals with relevant expertise in climate science and related disciplines are encouraged to register and contribute.
The IPCC particularly welcomes broad participation from experts across all regions to ensure diverse scientific perspectives are reflected throughout the assessment.
Responsibilities of Expert Reviewers
Registered reviewers will evaluate the draft report by assessing:
- Scientific accuracy
- Balance of evidence
- Clarity of presentation
- Completeness of the assessment
Reviewers may also:
- Suggest improvements to figures and tables.
- Recommend revisions to improve readability and scientific precision.
- Identify additional relevant scientific literature with full citations.
- Highlight areas requiring clarification.
- Recommend ways to improve the presentation of scientific evidence while maintaining its integrity.
Benefits of Participating
Experts selected to participate will have the opportunity to:
- Contribute to one of the world’s leading climate science assessments.
- Help strengthen the scientific quality of the IPCC Seventh Assessment Report.
- Collaborate within a global network of climate experts.
- Gain experience in the international scientific review process.
- Be invited to review the Second Order Draft after participating in the First Order Draft review.
- Receive official acknowledgment as an IPCC expert reviewer in the published report.
About the IPCC Seventh Assessment Report (AR7)
The Seventh Assessment Report (AR7) is part of the IPCC’s seventh assessment cycle and will provide governments worldwide with the latest scientific evidence on climate change.
Working Group I focuses on:
- The physical science basis of climate change
- Observed climate trends
- Future climate projections
- Climate processes and feedbacks
- Regional climate information
The complete Seventh Assessment Report, including contributions from all three Working Groups and the Synthesis Report, is expected to be finalized by late 2029.
Why Participate?
Participating as an expert reviewer offers researchers an opportunity to contribute directly to a globally recognized scientific assessment that informs international climate policy, adaptation planning, and mitigation strategies.
The IPCC review process relies on volunteer contributions from experts worldwide, ensuring reports remain objective, transparent, scientifically rigorous, and representative of the latest research.
Researchers with expertise in climate science and related fields are encouraged to register before the deadline and help strengthen one of the most important scientific assessments on climate change.
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