IPCC opens registration for experts to review First Order Draft of Working Group I contribution to the Seventh Assessment Report

GENEVA, 6 July – Registration is now open for experts to review the First Order Draft of the Working Group I contribution to the IPCC Seventh Assessment Report (AR7). The Working Group I contribution to AR7 is assessing the latest physical science basis of climate change, including observed and projected large-scale climate changes, climate processes and feedbacks, and regional climate information.

The expert review, the first of multiple review stages, will run from 10 August to 2 October 2026.

Interested experts are invited to register here by 23:59 CEST on 25 September 2026.

“The strength of IPCC assessments relies on the breadth and quality of expert input from all regions of the world. We therefore encourage relevant experts worldwide to engage and contribute to this review. The review process is key to ensure that the report reflects the most robust and up-to-date scientific understanding of physical science of climate change” said Robert Vautard, one of the Co-Chairs of IPCC Working Group I

During the review, experts are invited to comment on the accuracy, balance, clarity and comprehensiveness of the report. They may suggest improvements to the presentation of information, including figures and tables, identify relevant scientific literature with full citations, propose revisions, and recommend ways to improve the clarity and conciseness of the text while preserving its scientific integrity.

“Expert review is a cornerstone of the IPCC assessment process. The diverse knowledge, perspectives and expertise provided by reviewers help strengthen the scientific quality, policy relevance and credibility of our reports. We warmly encourage experts to engage with the IPCC in this important effort” said the other Working group I Co-Chair Xiaoye Zhang.