Over 100 experts from more than 40 countries are meeting in Bilbao, Spain this week for the first meeting of authors and review editors of the “2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers (SLCF)”. This will be the first report released by IPCC in the seventh assessment cycle and it is being prepared by the Task Force on National Greenhouse Gas Inventories (TFI).
The “2027 Methodology Report” is expected to provide guidance on anthropogenic emissions for Short-lived Climate Forcers, not including secondary human-induced substances.
“The report aims to provide clear guidance on measuring emissions from key short-lived climate forcing substances, including nitrogen oxides, carbon monoxide, and others, which significantly contribute to global and regional air quality and climate change,” said Takeshi Enoki, one of the Co-Chairs of the TFI.
This week’s meeting in Bilbao marks the beginning of the drafting process of this Methodology Report which is scheduled to be released in March 2027. The Coordinating Lead Authors and Lead Authors at this meeting will start developing the report based on the outline agreed by the Panel during its 61st Session held in Sofia, Bulgaria in July/August 2024.
“We are excited to begin work on this report with a diverse group of experts selected from the 394 nominations we received. Their work will be important for enhancing the data used in climate models,” said Mazhar Hayat, TFI Co-Chair.
Following the Panel’s 61st Session, the IPCC called for nominations of experts to act as authors and review editors of the 2027 Methodology Report in August 2024. The TFI Bureau, also known as the Task Force Bureau, in consultation with relevant Working Group Co-Chairs selected the report’s Coordinating Lead Authors, Lead Authors and Review Editors. In their selection, they considered scientific and technical expertise, geographical and gender balance in line with Appendix A to the Principles Governing IPCC Work.
A preliminary list of the Authors for the 2027 Methodology Report is available here.
Following the Lead Author Meeting, there will be an outreach event hosted by the Spanish Climate Change Office at the Bizkaia Aretoa in Bilbao on Thursday, March 27, 2025.