The third annual PARIS (15 | 16 January 2026) meeting brought together over 60 researchers to review progress in improving how greenhouse gas emissions are measured, analysed, and reported. Participants presented advances in datasets, modelling methods, and visualization tools. The project was evaluated by an exteranl Scientific Advisory Board, which acklowledged the overall scientific quality and the project’s ability to harmonize complex information across different scales. A key highlight was the collaboration of PARIS with national inventory teams and the provided annexes to the National Inventory Documents (NIDs). Another key highlight is the Fluxy tool, which supports clearer comparison of greenhouse gas models and was recognized as having strong long-term potential. The Scientific Advisory Board also identified areas for improvement, particularly around aligned data workflows and reducing reliance on manual processes.

Alongside scientific achievements, discussions emphasised the importance for projects such as PARIS of ensuring that results reach beyond the research community. Reviewers encouraged stronger communication, outreach, and engagement with policymakers so that the project’s outputs can inform climate decision-making. Expanding international collaboration was also seen as a priority, including maintaining and deepen links with global scientific and policy networks such as the World Meteorological Organization, its Integrated Global Greenhouse Gas Information System, and European infrastructure like the Integrated Carbon Observation System.

Looking ahead, participants are interested in sustaining PARIS achievements beyond the current funding period. Proposed directions include embedding successful tools into longer-term infrastructures, strengthening partnerships with related projects, and improving coordination with policy and inventory communities. External feedback reinforced that while the scientific foundation is strong, lasting impact will depend on continued outreach, international cooperation, and stable funding mechanisms that allow the work to evolve into durable climate monitoring capacity.