CleanCloud Project

📢 Don’t miss tomorrow’s seminar at 13:00 CET by our excellent early-career scientists!

📢 We’re kicking off 2026 with the first CleanCloud ACI Seminar of the year! Featuring our early career scientists from Cluster 3: Dr. Gabriella Wallentin (KIT) & Dr. Noé Clément (IPSL)

🗓️ Wednesday, Feb 25, 13:00 CET

Join us: epfl.zoom.us/j/6269954659...

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...

📢 Don’t forget tomorrow’s seminar at 13:00 CET by our excellent early-career scientists!

Don’t miss two exciting talks from our ECS: Dr. Olga Zografou and Dr. Baseerat Romshoo. They will share new results on #aerosol-#clouds interactions from in-situ observations at (HAC)2 and ATTO. 🌍☁️
📆 Wednesday 26 Nov at 1pm (CET) on Zoom! epfl.zoom.us/j/6156668523...

📢 Don’t forget today’s seminar at 13:00 CET by Prof. Trude Storelvmo

📢 Our next seminar is coming up!
🗓️Join us next Wednesday at 13:00 CET on zoom

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...

📢 Don’t forget tomorrow’s seminar at 13:00 CET by Dr. Bastiaan van Diedenhoven

Join Dr. Bastiaan van Diedenhoven to explore how advanced polarimetric cloud retrievals shed new light on #aerosol - #cloud interactions 🛰️🌍☁️
📆 Wednesday 24 Sep at 1pm (CET) on Zoom! epfl.zoom.us/j/6156668523...

📢 Don’t forget tomorrow’s seminar at 13:00 CET with Prof. Harri Kokkola.

📢 Our next seminar is coming up!
🗓️Join us next Wednesday at 13:00 CET on zoom!

Join Prof. Harri Kokkola to explore disentangling #aerosol–#cloud interactions from cloud variability. 🌍☁️
📆 Wednesday 27 Aug at 1pm (CET) on Zoom! epfl.zoom.us/j/6156668523...

Checker Tobi und die Reise zu den fliegenden Flüssen (2023) ⭐ 7.3 | Documentary, Adventure, Family 1h 33m

Flying rivers offer a great introduction to science. 325 meters above the rainforest, Mira Pöhlker explains the formation of aerosols and clouds – and what it really means to have flying rivers, in the popular movie Checker Tobi and the journey to the flying rivers. Our www.imdb.com/title/tt2853...

Don’t forget to join us tomorrow at 13:00 CET for the exciting seminar by Prof. Kerry Emanuel.

📢 Our next seminar is coming up!
🗓️Join us next Wednesday at 13:00 CET on zoom!

#Aerosols and #hurricane - what’s the link?
Join Prof. Kerry Emanuel for insights into the Atlantic hurricane drought of the 1970s–80s.
📆 Wednesday 30 July at 1pm (CET) on Zoom! epfl.zoom.us/j/6156668523...

Don’t forget to join us tomorrow at 13:00 CET for the exciting seminar by Dr. Alexei Kiselev. See you there!

Le monde mystérieux des nuages - Regarder le documentaire complet | ARTE Phénomènes aussi éphémères que fascinants, les nuages restent une énigme pour la science. Comment se forment-ils ? Quel est leur rôle dans le fonctionnement du climat ? Peut-on envisager de les exploi...

Our favourite topic! Meet CleanCloud's Dr. Mira Pöhlker in this great film "The mysterious world of clouds", now nominated for best Scientific film at #GreenScreen international wildlife filmfestival #Meetourscientists www.arte.tv/fr/videos/11...

📢 Our next seminar is coming up!
🗓️Join us next Wednesday at 13:00 CET on zoom!

Interested in #ice microphysics in #clouds? Join our next seminar with Dr. Alexei Kiselev 📆 Wednesday 25 June at 1pm (CET) on Zoom and find out! epfl.zoom.us/j/6156668523...

#ice_multiplication

#MeetOurScientists: The observations Dr Kostas Eleftheriadis and the rest of the CleanCloud-team make from Mt Helmos, are important to monitor long term developments and to decide on effective measures to tackle the #climatecrisis

The Weather and Climate Livestream just passed the 50 HOUR mark! Thank you to all of our viewers, speakers, hosts, and organizers!

We will be streaming live, on Youtube, until the official start of hurricane season this Sunday, June 1st. 50 more hours to go!

wclivestream.com/watch/

#MeetOurScientists: With the help of a cloud sampler, Aiden Jönsson is able to investigate the particles inside the clouds. Important to better understand aerosols and their interactions with clouds - and how future climate and weather will impact our lives.

📢 Reminder: Don’t forget to join us tomorrow at 13:00 CET for the exciting talk by Prof. Annica Ekman.

#MeetOurScientists: How can CleanCloud and other Horizon Europe projects make a difference? Through new measurements, improved models and less uncertainty for future climate predictions. Meet Daniel Partridge of @universityofexeter.bsky.social @horizoneu.bsky.social

📢 Our next seminar is coming up!
🗓️Join us next Wednesday at 13:00 CET on zoom!

😆We are happy to admit that not everything goes as planned - always, all the time... Here comes a selection of our bloopers from the #chopin campaign on MtHelmos. Enjoy! mediaspace.epfl.ch/media/What+i...

🎉The spectacular “Fog chaser” by CleanCloud’s Lionel Favre, taken on top of Mt Helmos, is among the winners of both Nature’s 2025 #ScientistAtWork photo competition and @snsf.ch Scientific Image Competition. Big congratulations! www.snf.ch/en/8qDTRiwkq...

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...