Methane emissions across oil and gas supply chains show strong spatial and temporal variability, and direct observations from satellites, aircraft, drones, mobile surveys, and continuous monitoring are rapidly expanding the evidence base. However, translating these measurements into robust greenhouse gas inventories remains challenging because of differences in scale, intermittency, source attribution, system boundaries, and reconciliation with engineering and inventory methods. This session invites contributions that bridge methane observations and inventory development across production, gathering, processing, transmission, storage, LNG, and distribution systems. Topics include multi-scale measurement reconciliation; methods for integrating observations, inventories, and engineering-based models; uncertainty quantification and attribution; super-emitter characterization; and regional or global case studies that improve methane accounting across supply chains. We welcome studies that advance transparent, measurement-informed methane assessment for scientific understanding and inventory development.

• GC - Global Environmental Change
• IN - Informatics