File:The Global Methane Budget 2008–2017.png

English: "The Global Carbon Project has established a consortium of more than 50 research institutions around the world to gather the observations, statistics and run global models to update and improve the methane budget regularly (every 2-3 years). The CH4 budget is estimated at the global scale, as shown here, but also in 18 continental regions for the 5 source categories listed in bold above using both "top down (TD)" and "bottom up (BU)" methods. BU uses diverse data inventories, observation-driven methods and process-based models (e.g. energy statistics, agricultural data, biogeochemistry modeling). TD optimally combines measurements of atmospheric CH4 at > 100 stations around the world with a first-guess estimate of CH4 emissions into an atmospheric inversion framework."