Next week, Xuemeng Chen will talk in our presentation series about atmospheric aeorols and their effects on low-level clouds in marine environments. It's online: Feb 11th, 15.30-16.30 UTC (Starts half an hour later than our other presentations!) Register here: shorturl.at/poyKz Photo: S. Röttger

The recordings for our first two presentations are available on our website: www.nuclim.eu/news-events/... The first was an overview of NuClim by our project coordinator @susanabarbosa.bsky.social and in the second Craig talked about radon-based greenhouse gas tracing.

Our fourth speaker in our presentation series is Paula Eisnecker. She is an early-career scientist at the University of the Azores working with remote sensing data to improve the understanding of local phytoplankton dynamics and their links to ocean–atmosphere CO₂ exchange. Photo: P. Eisnecker

Register for our next two presentations: Feb 11, 15.30-16.30 UTC: Atmospheric aerosol and pollution (Xuemeng Chen/Ava) shorturl.at/poyKz Feb 25, 15-16 UTC: Phytoplankton and the marine carbon cycle (Paula Eisnecker) shorturl.at/n5GNl Photos: X. Chen, P. Eisnecker

The ICOS newsletter for January is out now! Last month, we opened the Call for Abstracts for #ICOS2026SC and delved into how ICOS experiences and expertise contributed to the new @wmo-global.bsky.social #GAW measurement guidelines. Read more: preview.mailerlite.io/preview/7815...

Our fourth presentation will be about phytoplankton and the marine carbon cycle. Paula Eisnecker from the University of the Azores will present on Feb 25th, 15-16 UTC. Online and free! You can already register here: shorturl.at/n5GNl We are looking forward to seeing you! Photo: P. Eisnecker

Interested in aerosols and clouds? Xuemeng Chen (Ava) from the university of Helsinki will talk about the role of atmospheric aerosol particles in forming low-level clouds in marine environments. Come, join us: Feb 11th, 15.30-16.30 UTC, online Register here: shorturl.at/poyKz Photo: X. Chen

We had our second presentation yesterday. Craig talked about radon-based greenhouse gas tracing. And the next is coming in less than two weeks: On Feb 11th Xuemeng Chen (Ava) will talk about aerosols and clouds and why we are measuring them within NuClim.

Starting in about 3 hours!

Happening today! Join us online from 15-16 UTC when Craig Lils from NPL will talk about radon based greenhouse gas tracing. We will also be talking about how we are measuring radon in NuClim. There is still time to register here: shorturl.at/4oHEd See you later! Photo: Craig Lils

You can find the recording of our first presentation on our website: www.nuclim.eu/news-events/... At the same page, we are also adding the information for the presentations yet to come over the next few weeks. So, keep an eye on it.

Wednesday, we have our next presentation. Craig Lils from NPL will speak about radon-based greenhouse gas tracing. How measuring radon tells us something about the history of the air masses and how do we use it in NuClim. online, 28th Jan, 15-16 UTC Register: shorturl.at/4oHEd Photo: S. Chambers

There is still time to register for our presentation next week! Craig Lils from NPL will talk about radon-based greenhouse gas tracing and we'll explain how we are measuring radon in NuClim. Come join us! Jan 28th, 15-16 UTC Register here: shorturl.at/4oHEd Photo: C. Lils

In 2.5 weeks, we'll have our 3rd presentation. Xuemeng Chen (Ava) from the university of Helsinkig will talk about the role of atmospheric aerosol particles in forming low-level clouds in marine environments. Come, join us: Feb 11th, 15.30-16.30 UTC Register here: shorturl.at/poyKz Photo: X. Chen

There is still time to register for our presentation next week! Craig Lils from NPL will talk about radon-based greenhouse gas tracing and we'll explain how we are measuring radon in NuClim. Come join us! Jan 28th, 15-16 UTC Register here: shorturl.at/4oHEd Photo: C. Lils

One more week until our next presentation! Register here for Craig's presentation on GHG tracing: shorturl.at/4oHEd And two weeks later, Xuemeng Chen from the University of Helsinki will talk about atmospheric aerosol and pollution. Register: shorturl.at/poyKz (this will be half an hour later)

Craig Lils gives the 2nd presentation in our series (January 28th, 15-16 UTC). He is a graduate scientist at NPL and works on metrology in climate science to improve our understanding of uncertainty in emission estimates and marine heatwave categories. Register: shorturl.at/4oHEd Photo: C. Lils

Yesterday, we had our first presentation. @susanabarbosa.bsky.social introduced the project's background and goals. On Jan 28th (15-16 UTC), we'll continue with the next presentation and Craig Lils will introduce you to radon-based greenhouse gas tracing. Register here: shorturl.at/4oHEd

Join us today and learn about NuClim! We'll start at 15 UTC.

There is still time to register for our presentation today, 15-16 UTC! shorturl.at/RWQyv @susanabarbosa.bsky.social will introduce you to our project.

Our presentation series starts soon! It's online and free. Register for the first presentations now. 14. January: the NuClim project by susanabarbosa.bsky.social shorturl.at/RWQyv 28. January: Radon-based greenhouse gas tracing shorturl.at/4oHEd We are looking forward to seeing you there!

On Jan 28th 15-16 UTC, we'll have an online presentation about radon-based greenhouse gas tracing. It's free and open for everyone. Join us! Register here: shorturl.at/4oHEd

Our presentation series starts soon! It's online and free. Register for the first presentations now. 14. January: the NuClim project by susanabarbosa.bsky.social shorturl.at/RWQyv 28. January: Radon-based greenhouse gas tracing shorturl.at/4oHEd We are looking forward to seeing you there!

Craig Lils gives the 2nd presentation in our series (January 28th, 15-16 UTC). He is a graduate scientist at NPL and works on metrology in climate science to improve our understanding of uncertainty in emission estimates and marine heatwave categories. Register: shorturl.at/4oHEd Photo: C. Lils

There is very little radon in the atmosphere. At average terrestrial places, less than one in 10¹⁸ molecular entities is a radon atom. It can only be measured at such low concentrations because it is radioactive. The decay can be measured even though we can't detect the radon chemically.

Next week on Wednesday (14th January) @susanabarbosa.bsky.social will introduce you to the NuClim projects scientific background and goals. Join us at 15 UTC! Register here: shorturl.at/RWQyv Photo: Susana Barbosa

Next week on Wednesday (14th January) @susanabarbosa.bsky.social will introduce you to the NuClim projects scientific background and goals. Join us at 15 UTC! Register here: shorturl.at/RWQyv Photo: Susana Barbosa

Mid-January, we'll start our presentation series. The first presentation is on January 14th and gives an overview of the project! Register here: shorturl.at/RWQyv

After our first presentation on January 14th, two weeks later Craig Lils from NPL will cover air mass classficiation and greenhouse gas tracing based on radon measurements! You can already register here: shorturl.at/4oHEd

Mid-January, we'll start our presentation series. The first presentation is on January 14th and gives an overview of the project! Register here: shorturl.at/RWQyv

On January 14th, our project coordinator introduces you to NuClim. Register here: shorturl.at/RWQyv Susana Barbosa is a senior researcher at @inesctec.bsky.social (Porto, Portugal) and the coordinator of NuClim. She has a background in physics and applied mathematics (astronomy). Photo: S.Barbosa

How to do traceable calibrations at low radon activity concentrations? At the beginning of the year, our project partners from PTB and our external expert Scott from ANSTO together with others published a calibration procedure. Find the publication here: doi.org/10.1016/j.me...

We are pleased to announce the sessions for ICOS Science Conference 2026! ✨ A record number of sessions were proposed by the ICOS community, read more: https://ow.ly/i0Cg50XLj3P Abstract submission opens in January. #ICOS2026SC

2025 was a key and challenging year for us. We faced unexpected transportation delays and logistical issues related to deploying complex scientific equipment—such as compressed gas and radioactive material—on a remote island. We successfully overcame the challenges and have achieved key milestones:

First presentation in less than a month: January 14th 15-16 UTC. Susana Barbosa will give an overview of the different aspects and what we have already achieved and explain what we are looking into over the remaining time of the project. Register here: shorturl.at/RWQyv

If you haven't already, watch the video about Mace Head in the latest ICOS Newsletter! You'll meet part of our project team: Damien and @aimontanvir.bsky.social .

In our greenhouse gas measurements at the ENA station (Graciosa, Azores) over the last six months, we see frequent peaks in the concentrations of carbon dioxide (CO₂), methane (CH₄) and carbon monoxide (CO). For example, data from Oct 7-8: CO₂, CH₄ and CO peaks in one-minute average mixing ratios.

Cavity ring-down spectrometers can be used to measure the amount of different gases, including greenhouse gases CO₂ and CH₄, in the air. For this, the air sample is placed between mirrors inside a cavity and a laser pulse with a specific wavelength is send through it.

Comparability of measurements is important. In this interview with the BIPM and her keynote speech at #BIPM150, Oksana Tarasova explains the importance of metrology for environmental sciences and how comparability is ensured for global greenhouse gas measurements. www.bipm.org/en/-/2025-11...

New #ExploreICOS video out from the ICOS Atmosphere station Mace Head! This station on the west coast of Ireland is one of the world’s few stations with unobstructed access to clean, well-mixed Atlantic air. 🌎 ➡️ Watch the full video: youtube.com/watch?v=SoLW... #UniversityofGalway #ICOSIreland

Peak behind the scenes: Evolution of a sketch

We'll start a five-part online presentation series about different aspects of our project in January. The first talk will be on January 14th and then every second week following that. See the details below, more information will follow soon. Stay tuned!

We'll start a five-part online presentation series about different aspects of our project in January. The first talk will be on January 14th and then every second week following that. See the details below, more information will follow soon. Stay tuned!

As mentioned, we are measuring radon in the air at Graciosa and @maceheadccaps.bsky.social. For this, we are using ANSTO two-filter dual flow-loop radon detectors. That might sound complicated - and the details, of course, are - but today, we want to explain the concept. Photo: Scott Chambers

Radon xkcd.com/3037

On the balcony of that apartment, some hours were spent in deep contemplation of important research questions ... Text/Photo: Scott Chambers

Radon (Rn) is a naturally occurring radioactive gas. It is created by the radioactive decay of radium (Ra) in rocks and soil which itself ultimately originates from uranium (U). Radon decays to polonium (Po) and, in the end, to lead (Pb).

The first measurements are running and more will follow soon! NuClim aims to determine the baseline of greenhouse gas concentrations in the North Atlantic. We look at radon, greenhouse gases and a range of other parameters at the ENA observatory (Azores) and @maceheadccaps.bsky.social (Ireland).

If you are interested to learn more details about NuClim, the scientific background and set-up, have a look at our publication from earlier this year in EPJ Nuclear Sciences & Technologies: doi.org/10.1051/epjn...

A first for Europe – the new ICOS Curve interactive tool shows #carbondioxide levels and trends across Europe. Updated daily, the ICOS Curve is being used at today’s #COP30 Earth Information Day 2025. Interact with the ICOS Curve here: icos-cp.eu/news-and-eve...