☁️ 🌲 Cumulus clouds amplify boreal forest photosynthesis A recent study by Ezhova et al., based on long-term observations in Finland, shows that, in boreal forests, organic aerosols enhance photosynthesis under cumulus clouds. 🔍 www.nature.com/articles/s43... 🔍 certainty-aci.eu/news/

🌎🔥Roșu et al. found that the 2023 Canadian wildfires emissions caused widespread increases in aerosol concentrations across the Northern Hemisphere, leading to a measurable cooling of surface air temperatures 🔍 certainty-aci.eu/news-climate... 🔍 www.nature.com/articles/s44...

Missed the great fireside chat with Gavin Pretor-Pinney & Edward Gryspeerdt on clouds? 🌥️ No worries, you can catch the replay here: ⬇️⬇️⬇️

🛳️ 🌎 Impacts of shipping fuel regulations on global warming 👉 Read the paper: www.nature.com/articles/s43... (Jianhao Zhang, Yao-Sheng Chen, Edward Gryspeerdt, Takanobu Yamaguchi & Graham Feingold) 👉 Discover more CERTAINTY web stories: certainty-aci.eu/news/

A recent study by Hermant, Huusko and Mauritsen shows that the direct radiative effect of aerosols has continued to strengthen, even as emissions declined, whereas the indirect effect has weakened in line with emissions. 🔍 Read a summary here: certainty-aci.eu/news-aerosol...

🚀 Coming up on 19 September 2025: a fireside chat on clouds and climate with Gavin Pretor-Pinney and Edward Gryspeerdt 🔗 Register now: luma.com/3wtgxi06

☁️ Clouds & Climate: A Fireside Chat with Gavin Pretor-Pinney & Ed Gryspeerdt 🗓️ 19 Sept. 🕔 17:00–18:00 (GMT+2) 📍 Online luma.com/3wtgxi06 A special online fireside chat exploring the wonder of clouds & their vital role in the Earth’s climate system, bridging science, beauty & public engagement

[ 📣 New publication] Weak influence of anthropogenic emissions on aerosol, cloud, and rain in the wet season of the Amazon rainforest ✒️ Wang, X., Carslaw, K. S., Grosvenor, D. P., and Gordon, H. 🔗 acp.copernicus.org/articles/25/... 🔎 All CERTAINTY papers: certainty-aci.eu/publications/

📣 A new study examines the effects of the extreme 2023 Canadian wildfires using an Earth system model, comparing modelled atmospheric conditions with and without wildfire emissions. ✒️ Roșu et al. 🔎 www.nature.com/articles/s44... 🔎 All CERTAINTY publications: certainty-aci.eu/publications/

[ 📣 Summer 2025 - Publication] Organic aerosol enhances boreal forest photosynthesis under cumulus clouds ☁️ ✒️ by Ekaterina Ezhova et al. 🔗 Read the paper here: www.nature.com/articles/s43...

⏰ Join us tomorrow ⏰ 📢 WEBINAR Distinguishing aerosol-cloud interactions amidst cloud variability 🗨️ @harrikokkola.bsky.social 🗓️ Wednesday, Aug 27 🕐 13:00 CEST | 📍 Zoom: epfl.zoom.us/j/6156668523... @cleancloud-he.bsky.social

[📣 August 2025 - New publication] Excited to share our latest paper: "Using a Machine Learning Approach for Isolating Aerosol Effects on Cloud Droplet Number Concentration in Marine Stratocumulus Clouds" ☁️ ✒️ by Muhammed Irfan et al. 🔗 agupubs.onlinelibrary.wiley.com/doi/10.1029/...

📢 Do not miss @cleancloud-he.bsky.social 's webinar with @harrikokkola.bsky.social ☁️ Distinguishing aerosol-cloud interactions amidst cloud variability 🗓️ Wednesday, Aug 27 🕐 13:00 CEST | 📍 Zoom: epfl.zoom.us/j/6156668523...

The call for #session #proposals for the #EGU26 General Assembly is now open! Submit short course ideas and/or proposals for Union Symposia and Great Debates by 16 September 2025. 👉 Submit your proposals here: egu.eu/60GYS7

🆕 Publication - How to trace the origins of short-lived atmospheric species: an Arctic example A recent study by Anderson Da Silva et al. validated an improved protocol to trace the origins of particles - Essential for precise climate modeling. 🔗 certainty-aci.eu/news-tracing...

Interested in how #aerosols, #clouds and their interactions are represented in state-of-the-art #models? Join our next seminar with Prof. Annica Ekman 📆 Wednesday 28 May at 1pm (CET) on Zoom and find out! epfl.zoom.us/j/6156668523...

[@egu.eu 2025] Don’t miss the chance to discover the latest insights from our researchers! Join us at EGU 2025 in Vienna to learn more about our work. ➡️ List of CERTAINTY talks: certainty-aci.eu/egu-2025/

It's finally Monday and we hope to see you at @egu.eu this week! Here is the list of CleanCloud contributions: www.linkedin.com/posts/cleanc...

🎉...& another one joining the #ClimateResearchNet! Let’s give a warm welcome this time to @certainty-aci.bsky.social 🌍 This project is now part of our Bluesky space🔗go.bsky.app/LQkEWKx, connecting climate research initiatives to strengthen EU #ClimateResearch comm. & engage with the community.💡🌱

[📄 New publication] 💭 Aerosol Background Concentrations Influence Aerosol-Cloud Interactions as Much as the Choice of Aerosol-Cloud Parameterization ✍️ @louismarelle.bsky.social @gunnarmy.bsky.social Jennie L. Thomas & Jean-Christophe Raut 🔗 doi.org/10.1029/2024... @agu.org

🎉...& another one joining the #ClimateResearchNet! Let’s give a warm welcome this time to @certainty-aci.bsky.social! 🌍 This project is now part of our Bluesky space🔗 go.bsky.app/LQkEWKx, connecting climate research initiatives to strengthen EU #ClimateResearch comm. & engage with the community.💡🌱

How far can desert dust travel? How do clouds affect Earth’s climate? ... 🌍☁️ Test your knowledge with our quiz on aerosols, clouds & climate change: certainty-aci.eu/quiz/

⚒️ Article: High sensitivity of cloud formation to aerosol changes @annelev.bsky.social @harrikokkola.bsky.social www.nature.com/articles/s41...

Check our new paper if you are interested in aerosols and clouds: long-term observations reveal the sensitivity of cloud formation to aerosol changes! www.nature.com/articles/s41...

☁️ A new study has demonstrated that the formation & properties of lower-atmosphere clouds are highly sensitive to changes in atmospheric aerosol concentrations ➡️ www.nature.com/articles/s41... ➡️ www.uef.fi/en/article/l... @naturegeosci.bsky.social @annelev.bsky.social @harrikokkola.bsky.social

🌍 Quiz Time 🧠 How much do you know about the role of clouds and aerosols in climate change? Test your knowledge with our quiz: 🔗 certainty-aci.eu/quiz/ @horizoneu.bsky.social

[New publication] 📄 Radiative forcing from the 2020 shipping fuel regulation is large but hard to detect ✒️ Jianhao Zhang, Yao-Sheng Chen, Edward Gryspeerdt, et al. 🔗https://www.nature.com/articles/s43247-024-01911-9

Out now as part of the Faraday Discussion on Atmospheric chemistry in cold environments! #chemsky #skysky @faradaydiscussions.rsc.org

[New publication] 📄 Transport of continental particulate over the Labrador Sea and entrainment are important pathways for glaciation of remote marine clouds ✒️ Hugh Coe et al. 🔗https://pubs.rsc.org/en/Content/ArticleLanding/2024/FD/D5FD00005J

What have we learned from central Arctic #aerosol research in the last 7 years? Join our next seminar with Prof. Julia Schmale 📆 Wednesday 26 Feb at 1pm (CET) on Zoom and find out! epfl.zoom.us/j/6156668523...

💭 Fruitful Aerosol-Cloud Cluster Session today! We assessed progress, explored new synergies, and discussed future collaborations. 🙏 A big thank you to all our speakers and participants for their valuable contributions! 🔹 Stay tuned for upcoming joint activities.

Kicking off a productive CERTAINTY meeting! We are planning for Year 2 and beyond, aligning on current progress, and strengthening collaborations with our partners and International advisory committee. Exciting coordinated modeling case studies ahead. Welcome to all new team members & ECRs!

Currently, our poster session is in full swing at the CERTAINTY Annual Meeting in Grenoble! It’s an exciting moment to connect and share insights with our amazing team. The energy and collaboration are truly inspiring!

In January, CERTAINTY researchers delivered inspiring lectures to ERCA students, covering topics like aerosols and clouds, atmospheric dynamics, weather systems, remote sensing, and statistical analysis. Welcome to the new generation of scientists!

[New publication] 📄 Model analysis of biases in the satellite-diagnosed aerosol effect on the cloud liquid water path ✒️ @harrikokkola.bsky.social Juha Tonttila @silviamcalderon.bsky.social Sami Romakkaniemi @anttilip.net et al. 🔗 acp.copernicus.org/articles/25/...

🌍 Curious about the role of dust in climate & weather? Our commitment to #OpenScience? Or how tailored climate info shapes policy attitudes & perceived distance to #ClimateChange? 🔗 Explore these topics and more on our website: certainty-aci.eu/news/

📣Make sure you don't miss the first glimpse of #aerosol and #cloud from the NASA #PACE (Plankton, Aerosol, Clouds, ocean Ecosystem) mission! Join our CleanCloud webinar with Dr. Otto Hasekamp 📆 Jan 29 🕐13:00 CET on Zoom: epfl.zoom.us/j/6156668523... Mark your calendar! 📌

🌐 Modeling sea spray emission from leads in the Arctic ✍️ In a recent paper, Rémy Lapere et al. produce an estimate of the location, timing and amount of sea spray emissions from leads at the scale of the Arctic Ocean for 1 year. 🔎 certainty-aci.eu/news-modelin...

🌧️ Understanding aerosols and clouds is key to reducing uncertainties in climate science and improving predictions of their current and future impacts. This requires advanced observational systems to provide critical constraints for climate models: certainty-aci.eu/news-observa...

📄 New publication 🔹Terrestrial and Marine sources of ice nucleating particles in the Eurasian Arctic ✒️ by Guangyu Li, André Welti, Arianna Rocchi, Germán Pérez Fogwill, M. Dall'Osto & Zamin A. Kanji 🔗 certainty-aci.eu/publications/

[New publication ] 📄 Weak liquid water path response in ship tracks ✒️ Anna Tippett, Edward Gryspeerdt, Peter Manshausen, Philip Stier and Tristan W. P. Smith 🔗 acp.copernicus.org/articles/24/...

CERTAINTY is dedicated to fostering an environment where data & publications are not only accessible but also structured to encourage broad utilization and understanding within the scientific community & beyond ➡️ certainty-aci.eu/setting-a-st...

Mineral dust is one of the most significant aerosols by mass in the atmosphere, influencing both climate and weather in various ways. To deepen our understanding, CERTAINTY aims to improve the representation of dust and its impacts on clouds in models. 🔗 certainty-aci.eu/the-role-of-...

The Certainty Project is committed to training the next generation of scientists. That's why we're proud to have our researchers integrated into the ERCA program in 2025. ➡️Apply by October 13th for your chance to be part of it: erca-school.eu

A new study involving over 1,000 Finns used an innovative interactive tool to assess the impact of tailored climate information on knowledge, attitudes, and psychological detachment from climate change. 🔎Discover the paper findings here: certainty-aci.eu/impact-of-ta...

Our scientific coordinator @harrikokkola.bsky.social at EGU Aerosol-Cloud Interactions session. Do not miss the other presentations: meetingorganizer.copernicus.org/EGU24/sessio...

Moa K. Sporre presenting long term changes in fog frequency at Swedish airports and its potential drivers at EGU24 Join us: Clouds, Aerosol, Radiation and Precipitation interactions session, Room F2 meetingorganizer.copernicus.org/EGU24/sessio...

Perspectives on the desert dust contribution to ice nucleation in mixed-phase clouds and associated radiative forcing 👏Thanks to Carlos Pérez García-Pando (BSC) for this great talk yesterday at #EGU24 !

[EGU24] Come to session AS3.10 Clouds, Aerosol, Radiation and Precipitation interactions ➡️Orals |Thu, 18 Apr, 08:30–12:25 and 14:00–15:40 (CEST), Room F2 ➡️Posters | Fri, 19 Apr, 10:45–12:30, Hall X5 ➡️Posters virtual | Fri, 19 Apr, 14:00–15:45, Hall X5 @eurogeosciences.bsky.social

uef.varbi.com/en/what:job/... uef.varbi.com/en/what:job/... If you are interested in studying how interactions between atmospheric aerosols and clouds affect weather and climate, UEF offers positions for both doctoral student and post doc level researchers @certainty-aci.bsky.social