Aerosol-Cloud-Climate interactions
We discovered anthropogenic glaciation of supercooled liquid-water clouds and anthropogenic snowfall events downwind industrial aerosol hot spots (Toll et al., 2024 Science).
In the image on the left, the plume of snow is seen downwind of the cement factory when glaciated clouds have cleared away.
We discovered plume-shaped industrial aerosol perturbations on liquid-water clouds that we use as opportunistic experiments to better constrain anthropogenic climate forcing (Toll et al., 2019 Nature).
In the image on the right, bright greyish aerosol-polluted cloud lines are visible in the near-infrared composite satellite image. Polluted cloud tracks originate from the industrial and urban aerosol sources marked with bright white.
We discovered large-scale anthropogenic aerosol perturbations on liquid-water clouds (Trofimov et al., 2020 JGR Atmospheres).
In the image on the left, bright greyish large-scale aerosol-polluted cloud area is visible in the western part of the near-infrared composite satellite image.
Velle was awarded ERC consolidator grant
https://ut.ee/en/news/erc-grant-helps-velle-toll-quantify-impact-anthropogenic-air-pollution-particles-climate University of Tartu Associate Professor in Climate Physics Velle Toll received the Consolidator Grant from the European Research Council (ERC) to quantify the extent to which air pollution particles cool the Earth’s climate. The results of Toll’s work would …
Jorma was awarded a prize in the science contest for university students
In the Estonian national science contest for university students, Jorma was awarded third prize in the category of natural sciences at the PhD level https://etag.ee/en/activities/contests/the-national-student-research-competition
Velle has been elected as a Member of The Estonian Young Academy of Sciences
https://ut.ee/en/news/kertu-liis-krigul-and-velle-toll-became-members-estonian-young-academy-sciences
Climate Compass 2025 conference in Tartu
We organised the Climate Compass 2025 conference in Tartu https://kliima.ut.ee/en/climate-conference-climate-compass-2025/
Annual research award of UoT 2024 presented to Clouds & Climate Lab
Associate Professor in Climate Physics Velle Toll revealed that in industrial hot spots, anthropogenic air pollution causes snowfall and reduces cloud cover. https://ut.ee/en/news/university-tartu-research-award-went-centre-climate-research-discovery-about-anthropogenic-air
Velle’s presentation on climate change in the Parliament of Estonia
Velle presented the contemporary scientific understanding of anthropogenic climate change in the Parliament of Estonia https://www.youtube.com/watch?v=wGHUI7APtqM
ERAD 2024 best oral presentation award presented to Jorma
Best Oral Presentation Award to Jorma Rahu for the presentation “Ground-based Precipitation Radar Signatures of Anthropogenic Snowfall Events Downwind of Industrial Air Pollution Hot Spots” 12th European Conference on RADar in Meteorology and Hydrology (ERAD 2024), September 9-13 https://www.erad2024.it/ https://poster.easyabstract.it/ERAD2024/abstract/15091/161/882 …
Industrial snow: Factories trigger local snowfall by freezing clouds
Our research was covered by phys.org https://phys.org/news/2024-11-industrial-factories-trigger-local-snowfall.html
Industrial plumes seed snow
Our research was covered by the Chemical and Engineering News https://cen.acs.org/environment/atmospheric-chemistry/Industrial-plumes-seed-snow/102/i36?sc=230901_cenrssfeed_eng_latestnewsrss_cen
When Pollution Brings Snow
Our research was covered by NAUTILUS https://nautil.us/when-pollution-brings-snow-1131658/?utm_source=tw-naut&utm_medium=organic-social
