Our climate is surprisingly sensitive to these tiny particles YouTube video by CERTAINTY-ACI

Why aerosols matter

🌥️ What happens to our climate if the ingredients of clouds change?
That question is asked in a recent paper written by CERTAINTY scientists.

🎤 @drgilbz.bsky.social & @annelev.bsky.social

▶️ www.youtube.com/watch?v=0B6S...

Our climate is surprisingly sensitive to these tiny particles YouTube video by CERTAINTY-ACI

Made some videos with @certainty-aci.bsky.social about the climate impact of clouds and aerosols.

And you can check out the first one here 👇

The EC–ESA Aerosol Cloud Cluster brings together over 220 researchers across 40 institutions, uniting projects like CleanCloud, CERTAINTY, and AIRSENSE to improve climate predictions and support more effective climate action.
More info: certainty-aci.eu/ec-esa-aeros...

Beyond cloud cover: Low- and high-altitude clouds have distinct impacts on tree sap flow and transpiration Transpiration drives up to 40 % of terrestrial precipitation, with forests playing a critical role. This study combines long-term sap flow measurement…

[New publication]

☁️ 🌳 Beyond cloud cover: Low- and high-altitude clouds have distinct impacts on tree sap flow and transpiration

✍️Talvinen, S., Salmon, Y., Guttierez Lopez, J., et al.

www.sciencedirect.com/science/arti...

From Canada to India: the far-reaching impact of 2023’s wildfire smoke 🔥

✒️ Rosu Iulian-Alin et al.

➡️ Read the publication: www.nature.com/articles/s44...
➡️ Find out more on the climate effects of the Canadian wildfires: certainty-aci.eu/news-climate...

Implementation of primary and secondary ice production in EC-Earth3-AerChem: global impacts and insights Abstract. Clouds and aerosol–cloud interactions remain major sources of uncertainty in climate projections. Here, we improve the representation of mixed-phase clouds (MPCs) in the EC-Earth3-AerChem Ea...

[New publication]

📄 Implementation of primary and secondary ice production in EC-Earth3-AerChem: global impacts and insights

✒️ Montse Costa Surós et al.

➡️ Read the paper: acp.copernicus.org/articles/26/...
➡️ Discover all EC-ESA Aerosol Cloud Cluster publications: certainty-aci.eu/ec-esa-aeros...

Two recent studies co-authored by CERTAINTY members are improving our understanding of how the polar oceans, sea ice, and the associated atmospheric particles form and behave in polar regions and influence clouds.

➡️ certainty-aci.eu/contribution...

Great to come together with such a fantastic team at our Annual Meeting as we reflect on our progress and set the course for Year 3 and beyond!
@ilmatieteenlaitos.fi

Aerosol–Cloud Interactions Are Key to Climate Resilience YouTube video by CleanCloudProject

🌍 Better weather and climate projections mean smarter, safer, and more resilient decisions, for Europe and beyond

▶️ www.youtube.com/watch?v=ji3z...

Aerosol Cloud Interactions YouTube video by CleanCloudProject

Explore how clouds form, the crucial role aerosols play in weather and climate, and why understanding these tiny particles remains one of society’s biggest scientific challenges.

▶️ www.youtube.com/watch?v=RehM...

Do we really know by how much ellipsoidal shapes enhance the extinction of solar radiation by dust?
By Obiso et al.

🔍 doi.org/10.5281/zeno...

What is the EC ESA Aerosol Cloud Cluster? YouTube video by CleanCloudProject

The EC-ESA Aerosol Cloud Cluster addresses the biggest uncertainty in regional climate prediction: aerosol-cloud interactions.
It unites +220 researchers linking EU projects CleanCloud & CERTAINTY with ESA’s AIRSENSE to advance climate modeling & mitigation
🔗 www.youtube.com/watch?v=CPHt...

Understanding Aerosol-Cloud Interactions is Pivotal for Improving Climate Predictions - Eos Global cooperation and knowledge sharing are essential to improve our understanding of cloud formation and evolution through aerosol-cloud interaction.

Our perspective paper on aerosol cloud interactions is featured in Eos.com as editor ‘s highlight 👇
@cleancloud-he.bsky.social
@certainty-aci.bsky.social

Understanding Aerosol-Cloud Interactions is Pivotal for Improving Climate Predictions eos.org/editor-highl...

[EC–ESA Aerosol Cloud Cluster Activity]

⁉️Uncertainty in how air pollution interacts with clouds is the largest source of uncertainty in near-term climate projections
🔍New policy brief explains why reducing the uncertainty is essential for effective climate policy certainty-aci.eu/policy-brief...

Aerosol‐Cloud Interactions: Overcoming a Barrier to Projecting Near‐Term Climate Evolution and Risk Aerosol-cloud interactions (ACI) remain a barrier to provide precise and actionable advice to policy makers at global and regional levels We recommend improving satellite retrievals, expanding gr...

Excited to announce our new publication on #aerosol #cloud #interactions 👇

Proud to lead this perspective with great experts from the field

@cleancloud-he.bsky.social
@certainty-aci.bsky.social
#ESA-AIRSENSE

agupubs.onlinelibrary.wiley.com/doi/full/10....

Aerosol‐Cloud Interactions: Overcoming a Barrier to Projecting Near‐Term Climate Evolution and Risk Aerosol-cloud interactions (ACI) remain a barrier to provide precise and actionable advice to policy makers at global and regional levels We recommend improving satellite retrievals, expanding gr...

[New EC-ESA Aerosol Cloud Cluster publication]

Aerosol-Cloud Interactions: Overcoming a Barrier to Projecting Near-Term Climate Evolution and Risk

By Im et al.

➡️ agupubs.onlinelibrary.wiley.com/doi/10.1029/...

@cleancloud-he.bsky.social

Diverse aerosol effects revealed during wildfire and dust storm events in Ukraine in April 2020 Aerosol particles are significant drivers of meteorological phenomena, especially during high concentration events such as wildfires and dust storms. …

📄🔥 Diverse aerosol effects revealed during wildfire and dust storm events in Ukraine in April 2020

✍️ Savenets, M., Mahura, A., Nuterman, R., Kulmala, M., Petäjä, T.

Atmospheric Pollution Research, 2026, 102906, ISSN 1309-1042
www.sciencedirect.com/science/arti...

Regional climate imprints of recent historical changes in anthropogenic Near Term Climate Forcers Abstract. Near-Term Climate Forcers (NTCFs) play a crucial role in shaping Earth's climate, yet their effects are often overshadowed by long-lived greenhouse gases (GHGs) when addressing climate varia...

📄New publication:
Regional climate imprints of recent historical changes in anthropogenic Near Term Climate Forcers

✍️ Santos-Espeso, A. et al.

➡️ esd.copernicus.org/articles/16/...
➡️ all CERTAINTY papers: certainty-aci.eu/publications/

Efficient ice multiplication from freezing raindrop fragmentation - Communications Earth & Environment Drop fragmentation upon freezing is an efficient secondary ice process, contributing to cloud ice formation even at relatively high temperatures, according to quantitative analyses of ice crystals via...

[Continuing collaboration with @cleancloud-he.bsky.social]

❄️ Efficient ice multiplication from freezing raindrop fragmentation

🖊️ Nils Pfeifer, Bernd Mom, Dmitri Moisseev, Susan Hartmann, Julian Meusel, Corinna Hoose & Maximilian Maahn

🔎 Read the publication: www.nature.com/articles/s43...

🌗☁️Aerosols have an uncertain climate impact because they interact with clouds in complex ways, especially stratocumulus. These clouds behave differently by day and night, yet a new analysis by Pugsley et al. shows that the key processes actually occur at night:

certainty-aci.eu/news-the-nig...

🇪🇺 🌎 Building Europe’s most ambitious joint effort to address one of the main knowledge gaps in climate science by advancing fundamental understanding of cloud–aerosol interactions

Last week CERTAINTY, @cleancloud-he.bsky.social & @esa.int funded projects including AIRSENSE joined forces in Lausanne

Secondary ice formation in cumulus congestus clouds: insights from observations and aerosol-aware large-eddy simulations Abstract. Secondary ice production (SIP) was investigated in a cumulus congestus system observed during the Secondary Production of Ice in Cumulus Experiment (SPICULE) campaign. Large-eddy simulations...

[New publication]

📃 Secondary ice formation in cumulus congestus clouds: insights from observations and aerosol-aware large-eddy simulations

✒️ @silviamcalderon.bsky.social et al.

➡️ Paper: acp.copernicus.org/articles/25/...
➡️ All CERTAINTY publications: certainty-aci.eu/publications/

Assessing the global contribution of marine aerosols, terrestrial bioaerosols, and desert dust to ice-nucleating particle concentrations Abstract. Aerosol–cloud interactions, particularly ice processes in mixed-phase clouds (MPCs), remain a key source of uncertainty in climate change assessments. This study introduces state-of-the-art ...

Assessing the global contribution of marine aerosols, terrestrial bioaerosols, and desert dust to ice-nucleating particle concentrations

✍️ Marios Chatziparaschos et al.

🔍 acp.copernicus.org/articles/25/...

Don’t miss Prof. Trude Storelvmo’s talk on Arctic mixed-phase #clouds, connecting insights from small-scale processses to large-scale #climate impacts. 🌍☁️
📆 Wednesday 29 Oct at 1pm (CET) on Zoom! epfl.zoom.us/j/6156668523...

Organic aerosol enhances boreal forest photosynthesis under cumulus clouds - Communications Earth & Environment Natural aerosols under cumulus clouds enhance diffuse radiation and therefore photosynthesis in boreal forests, increasing carbon uptake, according to analysis of atmospheric data from a forest site in southern Finland.

☁️ 🌲 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/

Large-scale impacts of the 2023 Canadian wildfires on the Northern Hemisphere atmosphere - npj Clean Air npj Clean Air - Large-scale impacts of the 2023 Canadian wildfires on the Northern Hemisphere atmosphere

🌎🔥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