Editing Methane Emissions (Anthropogenic) (section)

== Monitoring and Measurement ==
Monitoring of anthropogenic methane emissions relies on a combination of national greenhouse gas inventories, facility-level reporting, atmospheric measurements, and remote sensing technologies. The primary monitoring backbone consists of inventories submitted under the United Nations Framework Convention on Climate Change (UNFCCC), which aggregate emissions data reported by countries based on standardized methodologies.

Atmospheric methane concentrations are measured by ground-based stations, aircraft campaigns, and satellite instruments, providing observational constraints on emission estimates. Scientific methods include inverse modeling to attribute atmospheric methane to source regions and sectors. Databases such as the Emissions Database for Global Atmospheric Research (EDGAR) compile emission estimates from multiple sources to support global assessments. These complementary approaches enable cross-validation and refinement of methane emission quantification.

Within the SIGNAL system, anthropogenic methane emissions are treated as a defined environmental signal whose boundaries and measurement conventions are described below.