50 atmospheric scientists from all around the world meet at #CERN to discuss latest results from the on going CLOUD experiment. INAR

Comprehension of #planetsatmosphere is a way forward to understand our Earth's #atmosphere. This year, a new course on #planetsatmosphere was given for curious #UHEL students. Thanks for your support INAR Victoria Sinclair Faculty of Science, University of Helsinki ATM-MP University of Helsinki LATMOS

Ice nuclei are small particles found in the atmosphere. They are the necessary seeds for snowflakes to form. Despite long research, properties of these particles are poorly known. Zoé Brasseur from #INAR, is studying them at CLOUD #CERN using our #PINCii. CLOUD-MOTION.EU INAR

Aircraft engine emits particles that can act as seeds for ice to form, and therefore cloud to form. We are currently studying the properties of these particles during ANR-UNREAL campaign. Thanks Ismael K. Ortega for running our instrument during this special time. INAR Joel F. de Brito

After 4 weeks, today the second ANR-UNREAL campaign has finished. Thanks to everyone involved @LISA_ipsl ONERA Ineris LSCE IMT Lille Douai Université de Lille PhLAM INAR the result looks really interesting...

The shape of a #snowflake depends on the temperature and humidity in which it forms and grows. I took this picture yesterday in southern #Finland. It is a stellar dendrite #snowflake which has formed in a cloud with a high humidity and a temperature between -10¤C and -20¤C

Ocean surface is a major source of iodine. Today in Science we show using #CLOUDexperiment at #CERN that this molecule via oxidation forms new particles, that can act as cloud seed. Congratulation to Lance our PhD student leading this study. HIP science.sciencemag.org/content/371/65…

Ice crystal needs a seed on which to form. Could a #virus be the seed? Find it out in our Biogeoscience article :-) #INP #Atmosphere AGU Biogeosciences INAR “Ice nucleation by viruses and their potential for cloud glaciation” bg.copernicus.org/preprints/bg-2…

#Sarahandust is an effective ice nuclei seed. Well, it does not snow too much in the Sahara, however, #Sarahandust can travel, a lot. A few days ago it arrived in Finland, making the snow brown. Now with the melting of the snow, the Finish countryside transformed into “leopard”.

Congratulation for their Nobel Prize to Syukuro Manabe, Klaus Hasselmann, and Giorgio Parisi for their pioneer work on climate modeling. #nobelprize2021

doi.org/10.5194/acp-20… Atmospheric ions are present through the all atmosphere. In Beck et al. we flew an ion mass spectrometer from 150 m AGL up to the #FreeTroposphere to measure their vertical distribution and diurnal evolution above #SMEARII Finland GlobalSMEAR Atmospheric Chemistry and Physics

After 2 months of studying ice nuclei particles at the (very) remote #ABOA research station in #Antarctica, our #INAR scientists have packed the instruments and are on their way back home. Congratulation on their excellent work.

We use the #CLOUDchamber at #CERN to investigate the role of aerosol particles on #IceNucleation. After 2 years of renovation, the experiment will resume in March. Yesterday, national Finnish TV showed live the advancement of the #CLOUDchamber (and also local Finnish weather)

Congratulations to Jörg Wieder for his successful PhD defence. His work brings us one step forward in the understanding of the role of #INP in mixed-phase clouds. I really enjoyed being his external examiner & visiting the fabulous #ice laboratory at ETH in Switzerland.

In our new CLOUD paper, we investigate upper tropospheric atmospheric conditions. We found a strong synergy between nitric acid, sulfuric acid, and ammonia gases to form new particles that can then act as ice nuclei. Congratulation Mingyi Wang et al. nature.com/articles/s4158…

Congratulation to Yannick Bras for your successful Ph.D. defense. Your observations and parameterizations of the #INP properties from the south-western pacific ocean and from remote mountains are very valuable. I really enjoyed being your external examiner.

🥳🎉Congratulation @lisab0501 for your entire journey through your Ph.D. 👩‍🔬It was an immense pleasure to work with you. You did an excellent defense.🏆 I wish you all the best for your future. And thanks Karine @LampPhysique for being Lisa´s opponent. urn.fi/URN:ISBN:978–9…

In polar regions, increased cloud coverage has a warming effect since it reduces longwave radiation lost to space. We find that iodine oxoacids enhance the rate of formation of cloud seeds by 10- to 10,000-fold compared with previous understanding. science.org/doi/10.1126/sc…