Editing Aboveground biomass stock — Biosphere (section)

== Monitoring and Measurement ==
Monitoring aboveground biomass stock involves a combination of remote sensing technologies, field inventory data, and modeling approaches. Satellite-based sensors such as lidar, radar, and optical instruments provide spatially extensive and repeatable measurements that can estimate biomass by capturing vegetation structure and canopy characteristics. Ground-based forest inventories and plot measurements offer detailed information on tree species, diameter, height, and wood density, which are used to calibrate and validate remote sensing estimates. Periodic assessments integrate these data sources to produce biomass maps and time series that inform scientific analysis and environmental reporting. Institutions such as [https://en.wikipedia.org/wiki/National_Aeronautics_and_Space_Administration NASA], [https://en.wikipedia.org/wiki/National_Oceanic_and_Atmospheric_Administration NOAA], and various forestry research organizations contribute to the development and dissemination of biomass datasets.

Within the SIGNAL system, aboveground biomass stock is treated as a defined environmental signal whose boundaries and measurement conventions are described below.