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Carbon Accounting

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.

Key ESA SEF Resources

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.

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