Advancing Global Stocktake Inputs and Cross-Cutting Adaptation and Mitigation Topics: ESG BROADCAST shares key takeaways.
The Intergovernmental Panel on Climate Change (IPCC) will commence the drafting phase for its Seventh Assessment Report (AR7) cycle with the First Lead Author Meeting (LAM1) held in Paris from December 1 to 5, 2025. This gathering will bring together over six hundred scientific experts appointed across the three IPCC Working Groups (WGs). The meeting’s core objective is to coordinate the initial drafts for the three separate WG contributions to AR7, aiming to ensure an ambitious and integrated assessment of interdisciplinary questions related to climate change.
The IPCC, the United Nations body for assessing Climate Science Assessment, officially began its seventh cycle in July 2023 following the election of its new bureau. This cycle is structured to deliver a series of key reports leading up to the final synthesis. The comprehensive nature of the AR7 is designed to provide governments, stakeholders, and policymakers with the most current scientific information needed to develop effective climate policies and drive international negotiations.
The full Seventh Assessment Report (AR7) Synthesis Report is currently scheduled for release by late 2029. Preceding this final report, the individual WG contributions on the Physical Science Basis (WGI), Impacts, Adaptation, and Vulnerability (WGII), and Mitigation of Climate Change (WGIII) will be completed. These contributions form the backbone of the entire Climate Science Assessment effort, translating thousands of scientific papers into accessible, policy-relevant summaries for 195 member states.
In addition to the main WG reports, the AR7 cycle includes two crucial special reports designed to address specific, high-priority areas. The first is a dedicated Special Report on Climate Change and Cities, which is targeted for approval and publication in March 2027. The second is a Methodology Report on Inventories for Short-lived Climate Forcers, which is scheduled for release in the second half of 2027. The development of these specialized reports demonstrates the IPCC’s commitment to providing granular Climate Science Assessment tools for sectoral and localized applications.
The Paris LAM1 emphasized cross-cutting themes, aiming to bridge the traditional separation of the three working groups to better address interconnected climate issues. The report’s findings will directly feed into processes like the United Nations Framework Convention on Climate Change (UNFCCC) Global Stocktake, which periodically assesses collective progress towards the goals of the Paris Agreement. The quality and transparency of the IPCC’s assessment process remain vital for building trust in the scientific information provided to world leaders. The scope and timeline solidify the long-term nature of this critical international undertaking.
Strategic significance lies in the initiation of this massive Climate Science Assessment project, providing the critical scientific foundation for the next wave of global climate action and Regulatory Compliance. For the business sector, the AR7 cycle will introduce new levels of granularity on climate risks in urban environments and refined methodologies for greenhouse gas accounting, particularly for short-lived climate pollutants, which will directly impact corporate emission reporting and risk modeling. Companies must monitor the development of these reports, especially the city-specific and methodological guidance, to proactively adapt strategies and ensure they are aligned with the evolving scientific consensus.
Image Credit: Past Global Changes
