Global Emissions Initiative (GEIA)

Quantification of chemical emissions into the air is a key step in explaining observed variability and trends in atmospheric composition and in attributing these observed changes to their causes on local to global scales. Accurate emissions data are necessary to identify feasible controls that reduce adverse impacts associated with air quality and climate, to track the success of implemented policies, and to estimate future impacts. GEIA is a community effort that builds bridges between environmental science and policy, by bringing together people, data, and tools to create and communicate the highest quality information about emissions. GEIA seeks to enhance access to emissions data, facilitate analysis to improve the scientific basis for emissions information, and strengthen the emissions community.

GEIA Scientific Steering Committee (SSC), guided by the SSC Mandate, manages GEIA.

GEIA History from 1990 - Present provides details about GEIA's evolution, activities and accomplishments.



China Emissions, VOC Emissions, Latin America/Caribbean Emissions, Urban Emissions, Africa Emissions, and Near Real Time Emissions. 

New as of June 2024 - Methane Emissions Working Group 


GEIA 2023 Conference  SUMMARY

SAVE THE DATE  GEIA 2025 conference 

GEIA Network, over 2000 members from all over the world, receive timely notices about conferences and other GEIA related events, opportunities to engage with GEIA Working Groups and other activities, and job announcements.

JOIN the GEIA Network: Send your name, email, affiliation and country to Paulette Middleton GEIA Network Manager at



Visit the EMissions in South America (EMISA) website for detailed South America emissions.

Recent Publication

Past Events

IGAC ECR Conference

Virtually everywhere
More information


New Directions: GEIA's 2020 vision for better air emissions information (2013) G.J. Frost, P. Middleton, L. Tarrason, C. Granier, et al. Atmos. Env.