GENEVA, Oct 7 – Registration is open for experts worldwide to review the First Order Draft of the Working Group II contribution to the IPCC Seventh Assessment Report (AR7). The Working Group II contribution to AR7 assesses the vulnerability of socio-economic and natural systems to climate change, its consequences, and adaptation options. The authors have prepared the first draft following their Second Lead Author Meeting in May. Experts interested in participating in the review should register by 20 November 2026. The expert review itself will begin on 9 October 2026 and end on 4 December 2026. The expert review is the first of multiple review stages foreseen for every IPCC report. The review process is critical in preparing IPCC reports, as it reaffirms scientific rigour and ensures that the widest possible range of perspectives are considered. This is the first opportunity for experts to comment on the Working Group II report draft. All review comments submitted by experts or governments are addressed by the authors. The comments and the authors’ responses, together with the drafts, are published after the report is finalized. ‘The impact of climate change is becoming clear all over the world. IPCC is committed to providing a solid and relevant evidence base for all experts, practitioners and communities around the world that are continuously working on climate impacts, adaptation and vulnerability. We would like to invite all working on these issues to review this report and lend your voice to reflect the many critical issues of our time’, said Bart van den Hurk, Co-Chair of Working Group II. 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. ‘With 20 chapters as well as the IPCC Technical Guidelines for Assessing Climate Change Impacts and Adaptation Including Indicators, Metrics and Methodologies – TGIA – our authors worked hard to reflect the wide diversity of topics to present a first draft of this report. The TGIA is highly anticipated by governments and practitioners around the world as a framework to measure and assess the progress of adaptation projects. A report of this depth strongly benefits from comments of global practitioners, and we encourage all to register and engage’, said Winston Chow, Co-Chair of Working Group II. Interested experts can register for participation in the review here. The Working Group II Technical Support Unit has also prepared guidance on the expert review with Frequently Asked Questions and other Working Group II resources at the link here. For more information about the Expert Review, please contact Woo Qiyun, Senior Communications Manager, IPCC Working Group II Technical Support Unit, [email protected]. For more information, contact: IPCC Press Office, Email: [email protected]; Andrej Mahecic, +41 22 730 8516; Werani Zabula, +41 22 730 8120. Notes for editors What is the IPCC? The Intergovernmental Panel on Climate Change (IPCC) is the UN body for assessing the science related to climate change. It was established by the United Nations Environment Programme (UNEP) and the World Meteorological Organization (WMO) in 1988 to provide political leaders with periodic scientific assessments concerning climate change, its implications and risks, as well as to put forward adaptation and mitigation strategies. In the same year, the UN General Assembly endorsed the action by the WMO and UNEP in jointly establishing the IPCC. Participation in the IPCC is open to all member countries of WMO and the United Nations (UN). Thousands of experts from all over the world contribute to the work of the IPCC. For the assessment reports, experts volunteer their time as IPCC authors to assess the thousands of scientific papers published each year to provide a comprehensive summary of what is known about the drivers of climate change, its impacts and future risks, and how adaptation and mitigation can reduce those risks. The IPCC has three working groups: Working Group I, dealing with the physical science basis of climate change; Working Group II, dealing with impacts, adaptation and vulnerability; and Working Group III, dealing with the mitigation of climate change. It also has a Task Force on National Greenhouse Gas Inventories that develops methodologies for measuring emissions and removals. IPCC assessments provide governments, at all levels, with scientific information that they can use to develop climate policies. IPCC assessments are a key input into the international negotiations to tackle climate change. IPCC reports are drafted and reviewed in several stages, thus guaranteeing objectivity and transparency. About the Seventh Assessment Cycle Comprehensive scientific assessment reports are published every 5 to 7 years. The IPCC is currently in its seventh assessment cycle, which formally began in July 2023 with the elections of the new IPCC and Task Force Bureaus at the IPCC’s Plenary Session in Nairobi. At its first Plenary Session in the seventh assessment cycle – the 60th Plenary Session in Istanbul, Türkiye, in January 2024 – the Panel agreed to produce in this cycle the three Working Group contributions to the Seventh Assessment Report (AR7), namely the Working Group I report on the Physical Science Basis, the Working Group II report on Impacts, Adaptation and Vulnerability and the Working Group III report on Mitigation of Climate Change. The Synthesis Report of the Seventh Assessment Report will be produced after the completion of the Working Group reports and released by late 2029. During its 62nd Plenary Session held in Hangzhou, China, in February 2025, the Panel agreed on the outlines of the three Working Group contributions to the Seventh Assessment Report (AR7). At the Panel’s 63rd Plenary Session in Lima, Peru, in October 2025, member governments agreed on the scientific content of the 2027 Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture, Utilization and Storage. There, the Panel also agreed on the 2026 workplan for the three Working Group contributions to the Seventh Assessment Report. The Panel decided already during the previous cycle to produce a Special Report on Climate Change and Cities and a Methodology Report on Short-lived Climate Forcers during AR7. At the IPCC’s 61st Plenary Session held in Sofia, Bulgaria, from 27 July to 2 August 2024, the Panel agreed upon the outlines for the Special Report on Climate Change and Cities scheduled for approval and publication in March 2027 and for the 2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers scheduled for publication in the second half of 2027. In addition, a revision of the 1994 IPCC Technical Guidelines on impacts and adaptation as well as adaptation indicators, metrics and guidelines, will be developed in conjunction with the Working Group II report and published as a separate product. IPCC’s latest report, the Sixth Assessment Report, was completed in March 2023 with the release of its Synthesis Report, which provided direct scientific input to the First Global Stocktake process under the United Nations Framework Convention on Climate Change at COP28 in Dubai. For more information, visit www.ipcc.ch.