What Earth Observation Can Do for Carbon Accounting
Earth observation (EO) provides independent, large-scale and repeatable measurements that are transforming how carbon stocks and fluxes are monitored, reported and verified. Satellite data can map and monitor forests, wetlands, soils and other ecosystems at high resolution, track land-use and land-cover change, and estimate greenhouse gas concentrations in the atmosphere. By offering consistent, spatially explicit information across vast and often inaccessible areas, EO strengthens the scientific basis for carbon accounting and supports transparent, credible reporting at local, national and global scales — from voluntary carbon markets to national climate commitments under the Paris Agreement.
ESA's Role in Carbon Accounting
ESA contributes to global carbon accounting through a range of missions and programmes that generate the satellite data underpinning climate science and policy. Dedicated missions such as BIOMASS — designed to measure forest carbon stocks worldwide — alongside long-running programmes like the Climate Change Initiative (CCI), provide authoritative datasets on vegetation, land cover, soil moisture and greenhouse gas concentrations. ESA works closely with scientific institutions, policy bodies and private sector actors to turn these datasets into actionable information, supporting efforts to meet international climate targets, improve national greenhouse gas inventories, and build trust in emerging carbon markets.
How the Stakeholder Engagement Facility Supports Carbon Accounting Users
The ESA Stakeholder Engagement Facility (SEF) works with carbon accounting stakeholders to help them understand and harness the potential of Earth observation in their monitoring, reporting and verification workflows. SEF uses tools such as the Geospatial Explorer to illustrate how satellite data can address real-world measurement and transparency challenges. Through in-depth user engagement, the SEF team analyses the specific requirements of organisations working across land-based carbon sectors and identifies where EO can deliver the most value.
Capacity-building is a cornerstone of SEF's approach. As a supporter of the Carbon Farming Summit, SEF engages directly with farming and land management communities to raise awareness of how satellite data can strengthen carbon sequestration monitoring and support access to carbon finance schemes. These activities help organisations build the knowledge and practical capabilities needed to integrate EO data into their carbon accounting processes with confidence.
External Resources
The following resources cover ESA-funded projects and open tools relevant to users working with Earth Observation
for carbon stock estimation, greenhouse gas flux monitoring, and reporting under international frameworks such as
the Paris Agreement and the Kunming-Montreal Global Biodiversity Framework.
Blue carbon
ESA Coastal Blue Carbon
Develops EO-based products, indicators and methods for monitoring, conservation and restoration of the three
main coastal blue carbon ecosystems — seagrass meadows, salt marshes and mangroves. Delivers 10 m resolution
maps of blue carbon ecosystem extent and estimates of carbon stock changes across three time periods between
2015 and present, using Sentinel-1, Sentinel-2 and CNES very high resolution imagery. Directly supports
national carbon inventories and Nationally Determined Contributions.
Forest carbon
ESA Forest Carbon Monitoring (FCM)
A toolset for satellite-based forest biomass and carbon stock monitoring using Sentinel-1, Sentinel-2 and
auxiliary data, deployed on the Forestry TEP cloud platform. Supports compliance reporting (LULUCF, REDD+) and
voluntary carbon markets with demonstrated use cases across Europe, Colombia and Norway. The project recently
completed; tools remain accessible via the Forestry TEP platform.
Biomass dataset
ESA CCI Biomass
The most comprehensive open-access global dataset of above-ground forest biomass, produced through ESA's
Climate Change Initiative. Version 6 covers 2007–2022 at 100 m resolution, with annual maps, change products
between consecutive years, and coarser aggregations (1–50 km). Derived from Sentinel-1, ALOS PALSAR, Envisat,
ICESat and GEDI data. Directly supports national GHG inventories, Paris Agreement Global Stocktake reporting,
and carbon cycle modelling.
GHG inventories
ESA RECCAP-2
Integrates ESA CCI satellite data records into atmospheric inversion models to generate improved regional
carbon stock and GHG flux estimates (CO₂ and CH₄) for Europe, Siberia, the Amazon and the Arctic. Provides a
framework to compare and reconcile top-down satellite-based flux estimates with bottom-up national GHG
inventories, supporting independent verification under the UNFCCC Paris Agreement Global Stocktake.
Coordinated with the Global Carbon Project.
CO₂ & CH₄ monitoring
Copernicus Atmosphere Monitoring Service (CAMS)
The EU's operational service for atmospheric composition monitoring, providing open, free data on CO₂ and CH₄
natural fluxes and anthropogenic emissions globally. Key products include inversion-optimised GHG surface
fluxes, a real-time Methane Hotspot Explorer (powered by Sentinel-5P / TROPOMI data) that maps individual
methane emission plumes from industrial leaks, and reanalysis datasets dating back decades. Fully open via the
Atmosphere Data Store.
Carbon budget data
Global Carbon Project — Global Carbon Atlas
The authoritative annual global carbon budget, synthesising fossil CO₂ emissions, land-use change emissions,
and ocean and land carbon sinks from over 100 research institutes. All data are freely downloadable. The
companion Global Carbon Atlas provides interactive maps and time-series visualisation of CO₂ and CH₄ budgets
at global, regional and national scales — a standard reference for climate policy, reporting and research.
Forest monitoring
Global Forest Observations Initiative (GFOI)
A multi-agency initiative (including ESA, NASA, JAXA and FAO) coordinating satellite data and methods for
national forest monitoring, specifically to support REDD+ measurement, reporting and verification (MRV). The
GFOI Methods and Guidance Document is the international reference for integrating EO data into forest carbon
accounting. The REDDcompass platform provides country-facing tools, guidance and datasets for forest carbon
MRV.