Part 3
Projects & Landmarks
Environment / Landmark


Aerosol, Clouds and Trace Gases Research Infrastructure

The Aerosol, Clouds and Trace Gases Research Infrastructure (ACTRIS) is a distributed RI dedicated to high-quality observation of aerosol, clouds, trace gases and exploration of their interactions. ACTRIS delivers precision data, innovative services, and procedures regarding the 4D variability and the physical, optical and chemical properties of short-lived atmospheric constituents. It improves the current capacity to understand and predict past, current and future evolution of the atmospheric environment. ACTRIS serves a vast community of users working with observations, experiments, models, satellite data, analysis and predicting systems. It offers access to advanced technological platforms to explore atmospheric processes crucial for monitoring air quality and understanding climate change.

In the ESFRI Roadmap since 2016, ACTRIS was granted the status of ESFRI Landmark in 2021 as a result of successful submission of the European Research Infrastructure Consortium (ERIC) Step2 application by thirteen Member States. ACTRIS builds on the longterm collaboration within the atmospheric science community sustained by a series of EU-funded projects since 2000. After successfully completing the Preparation Phase from 2017 to 2019, ACTRIS has entered the Implementation Phase in January 2020 supported by the ACTRIS IMP project and by committed countries with their national ACTRIS budgets. ACTRIS Implementation Plan outlines the main activities to be worked on during the Implementation Phase. ACTRIS is aiming to be operational with well-functioning operations and services in 2025.

General Info

University of Helsinki - FMI
Helsinki, Finland

legal status


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