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Standardised Greenhouse Gas Measurements Throughout Europe

ICOS, Integrated Carbon Observation System, provides standardised and open data from close to 180 measurement stations across 16 European countries. ICOS stations observe greenhouse gas concentrations in the atmosphere as well as carbon fluxes between the atmosphere, land surface and oceans.

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Latest news

ATC and ETC joint study wins AMT Outstanding Publication Award

A cross-domain research study conducted by the ICOS Atmospheric Thematic Centre (ATC) and Ecosystem Thematic Centre (ETC) has been awarded the Atmospheric Measurement Techniques (AMT) publication’…

International Women’s Day interview with Ingunn Skjelvan: “We were the very first ones in Norway doing such measurements”

08 Mar 2026
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In Memoriam: Dr. Emilio Cuevas (1957–2026)

05 Mar 2026
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ICOS Switzerland and ICOS Czech Republic collaborate on the INETFLUX project

26 Feb 2026
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ICOS Station Network

ICOS stations are coordinated and run by the ICOS National Networks in 16 member countries. Stations in the National Networks operate in three distinct domains: Atmosphere, Ecosystem and Ocean.

View station list and map

Browse ICOS Countries

ICOS Curve

The ICOS Curve, an interactive web service, shows the dynamics and trends in CO2 levels in the atmosphere above Europe. It allows for comparing CO2 levels from different ICOS Atmosphere stations with European and global averages.

Learn more about ICOS Curve

Upcoming events

All events

ICOS at EGU26

May 3rd 2026 to May 8th 2026 Learn more

ICOS Science Conference 2026

September 15th 2026 to September 17th 2026 Learn more

Highlights

ICOS Science Conference 2026

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NUBICOS project

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ICOS Talks are back

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ICOS Cities project

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ICOS Carbon Portal

ICOS Carbon Portal offers free access to high-quality and standardised greenhouse gas data, as well as to scientific and educational products and services. The Carbon Portal is a ‘one-stop shop’ for all ICOS data products.

Carbon Portal manages data security, enforcement of the ICOS data policy, with user-friendly (and machine-friendly) internet- and other computer-network based interfaces. It organises long-term archiving of ICOS data products to guarantee their safe storage, future access and easy re-use.

Access ICOS data ICOS Data Collection Process