Seventh Edition Introduces New Methodologies and Emission Factors
The International Civil Aviation Organization (ICAO) has published the seventh edition of its regulatory guidance on default life cycle emissions values under the Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA). This update, approved in June 2025, introduces a series of refinements to ensure accurate calculation of emissions from CORSIA-eligible fuels.
Key Updates in Emission Methodologies
The latest edition includes updated default values for induced land use change (ILUC) across all fuel pathways. These revisions incorporate the most recent IPCC 2019 factors, remove the effects of soil carbon accumulation from land management practices, and refine energy yield calculations for ATJ-ethanol pathways. This ensures more geographically accurate and scientifically current emissions assessments.
In addition, the document integrates corrections for hydrogen and heat production methods, along with international transport emissions. It also adds new core LCA values for ATJ-Ethanol standalone pathways and introduces default ILUC values for Brazilian corn grain-based ATJ fuels.
Furthermore, detailed equations for calculating life cycle emissions from co-processed fuels at certified facilities have been introduced, bolstering compliance assurance with Sustainability Criteria 1.1.
Conclusion
With this update, ICAO continues to strengthen the scientific foundation of CORSIA’s emissions accounting, ensuring that sustainable aviation fuels are evaluated with precision and transparency. These changes are essential as international aviation accelerates its transition toward greener, lower-carbon fuel alternatives under evolving global climate frameworks.
Download Document File Here: – CORSIA Default Life Cycle Emissions Values for CORSIA Eligible Fuels (Seventh Edition): – June 2025 Update