WMO publishes new good practice guidance on estimating national-scale GHG emissions
Atmospheric measurements can complement greenhouse gas inventory methods, offering additional approaches for tracking emissions, identifying trends, and supporting transparency. A new “good practice guidance” from WMO outlines approaches for using atmospheric observations in national GHG inventories, with contributions from ITMS on national-scale GHG emission estimation in Germany.
The World Meteorological Organization (WMO) has released the first IG3IS Good Practice Guidance for Estimating National-Scale Greenhouse Gas Emissions using Atmospheric Observations (GAW Report No. 319). The report, led by Anita Ganesan and Alistair Manning together with the IG3IS steering group, was discussed during an IG3IS workshop in Geneva in July this year, in which ITMS members also participated, and was published on 2nd of December, 2025.
The good practice guidance describes how atmospheric measurements can complement greenhouse gas inventory methods, offering additional approaches for tracking emissions, identifying trends, and supporting transparency. The report also presents case studies of national-scale flux estimation methodologies from several countries. ITMS contributed the German chapter, outlining the aims of ITMS and providing an overview of current developments.
The publication contributes to ongoing efforts to strengthen observation-based greenhouse gas monitoring in support of the Paris Agreement.
More information can be found here:
Video recording of the report’s presentation, including transcript