IPCC Opened Expert Review for Climate Impact Draft
Researchers can now register to evaluate the first draft of the IPCC's upcoming climate vulnerability report.
Updated on Oct. 7, 2026 in Environmental
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The Intergovernmental Panel on Climate Change (IPCC) has opened the expert review period for the First Order Draft of its Seventh Assessment Report Working Group II contribution. This draft, which assesses global vulnerability to climate change, comprises 20 chapters.
Why it matters
The review process is designed to ensure scientific rigour and balance by incorporating diverse perspectives before the final assessment. It serves as a critical mechanism to validate climate data and projections that inform global policy decisions.
The draft report consists of 20 chapters compiled following a lead author meeting held in May 2026. Experts are tasked with reviewing the text for accuracy, balance, and clarity before the next stage of the assessment process.
The players
Intergovernmental Panel on Climate Change
An international body that provides comprehensive scientific assessments on the state of climate change and its risks.
The details
The review follows a structured methodology where authors refine technical content based on feedback from both experts and governments. This collaborative approach allows for the peer review of complex climate models and impact assessments. The process is intended to produce a robust document that characterizes the current scientific understanding of climate vulnerability across various sectors.
Timeline
May 2026: The second lead author meeting occurred.
9 October 2026: The expert review period begins.
20 November 2026: The deadline for expert review registration.
4 December 2026: The expert review period concludes.
Late 2029: The Synthesis Report of the Seventh Assessment Report is scheduled for release.
The Tech Race
This review marks a transition toward the completion of the Seventh Assessment Report cycle. It follows established protocols for building scientific consensus that tracks with the IPCC's long-term research trajectory.
The review period is primarily for subject matter experts who can provide technical input on the 20-chapter draft. Registered experts will influence the final report, which provides the foundational data for future international climate policies and environmental planning.
The takeaway
This review stage is essential for establishing the credibility of the upcoming assessment. Observers should track the registration deadline of 20 November 2026 to understand how the broader scientific community is engaging with the draft.
What happens next
Experts must register for the review by 20 November 2026. The full Synthesis Report of the Seventh Assessment Report is slated for release by late 2029.
Further reading
Learn more about the latest developments in climate research at the Environmental section.
More information
To participate in the review process, visit the Expert review registration portal.
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Do you believe expert peer review processes improve the reliability of international climate change reports?
