The world’s leading climate assessment body is entering a crucial round of discussions over when it will publish its next major reports on global warming, as governments face pressure to make decisions on emissions, climate finance and adaptation.
The Intergovernmental Panel on Climate Change (IPCC) is holding its 65th plenary session in Addis Ababa, Ethiopia, from October 12 to 16. Representatives of its 195 member governments are expected to discuss the timetable for the three working-group contributions to the organisation’s Seventh Assessment Report, commonly referred to as AR7.
Editorial Insight
Key Highlights
Important points readers should notice.
Issue/Event: Disagreement among IPCC member governments over the timetable for the next major climate assessment reports.
Location: Addis Ababa, Ethiopia, where the IPCC’s 65th plenary session is scheduled for October 12–16, 2026.
Authority/Organisation: Intergovernmental Panel on Climate Change (IPCC), comprising 195 member governments.
Action Taken: Member governments are discussing the publication schedule for the three working-group contributions to the Seventh Assessment Report.
Impact: The timetable could affect when policymakers receive updated scientific assessments for decisions on emissions, climate adaptation and climate finance ahead of the 2028 international climate-policy process.
The timing dispute has developed over nearly three years. Governments disagree over how quickly the assessment reports should be completed and how to balance the urgency of climate action with the time required for scientific research, review and participation from countries with fewer research resources.
The timing matters because the next major international review of progress under the Paris Agreement is expected in 2028. Updated scientific assessments could help governments evaluate climate risks, emissions-reduction pathways and adaptation needs before key decisions are made. If the reports are delayed beyond that period, negotiators may have to rely more heavily on existing assessments when considering their next steps.
The IPCC’s assessment cycle involves extensive work by scientists and review by governments and experts. Its reports do not prescribe a single policy for every country. Instead, they assess available research on the physical science of climate change, its impacts and adaptation, and options for reducing greenhouse-gas emissions. Governments use those findings as a scientific reference when developing and negotiating climate policies.
Editorial Analysis
Why This Matters
Climate negotiations depend partly on shared scientific assessments that help governments understand the scale of climate risks and compare possible responses. A delay in the next assessment cycle could reduce the availability of updated, comprehensive evidence during an important period of international decision-making. The issue is also relevant to developing countries, which need both timely climate information and meaningful participation in the scientific review process. The debate highlights the challenge of ensuring that international assessments are delivered quickly enough to inform policy without compromising the quality or breadth of the work. For readers, the distinction is important: the IPCC assesses scientific evidence, while governments decide how to use that evidence in their policies and international commitments. The current dispute is about the schedule for that assessment process, not a new finding that climate change has stopped or that existing climate science has been overturned.
The current disagreement involves competing priorities. Supporters of a faster schedule want the reports completed in time to inform the 2028 international climate process. They argue that governments need up-to-date evidence to assess progress towards climate goals and identify gaps in national action.
Other governments, including India and China, have argued that the timetable must allow adequate time for scientists—particularly those working in developing countries—to contribute to the assessment process. They have raised concerns that an accelerated schedule could make it more difficult for researchers with limited resources to conduct studies, participate in reviews and ensure that regional evidence is properly considered.
The disagreement is therefore not simply about a publication date. It also concerns how the international scientific assessment process should balance urgency, inclusiveness and the quality of evidence. A timetable that is too compressed could place pressure on researchers and reviewers, while a prolonged delay could leave policymakers without a comprehensive new assessment when they need it.
The three working-group reports cover different but connected aspects of climate change. The first examines the physical science, including evidence on the climate system and the causes of warming. The second assesses climate impacts, vulnerability and adaptation. The third examines options for reducing greenhouse-gas emissions and limiting further warming.
Taken together, these assessments provide governments with a broad scientific picture of climate risks and potential responses. Their conclusions can inform discussions on energy systems, infrastructure, food security, disaster preparedness, financing and long-term development planning. They do not replace national decisions or automatically determine the commitments governments make.
The Addis Ababa meeting is an opportunity for member governments to narrow their differences and establish a clearer schedule for the remaining work. An agreed timetable would give authors, reviewers and governments greater certainty about when drafts must be completed and when the reports could be considered for approval.
However, the meeting’s final outcome should not be assumed before a decision is announced. The timetable may depend on whether governments can agree on review periods and publication dates that meet the needs of both the scientific process and the international climate-policy calendar.
For developing countries, the timing carries particular significance. Many face substantial climate risks and require scientific information to support adaptation planning, infrastructure decisions and negotiations over climate finance. They also need the assessment process to incorporate evidence from different regions and ensure that researchers can contribute meaningfully.
The coming days will therefore be important for determining whether the IPCC can settle on a schedule that supports both scientific participation and timely international policymaking. Until an official decision is confirmed, the publication dates for the next major assessment reports should be treated as unresolved.
