VelleToll
velletoll.bsky.social
VelleToll
@velletoll.bsky.social
Climate researcher, Assoc Professor of Climate Physics
@unitartu Estonia, aerosol-cloud interactions

https://sisu.ut.ee/velle-toll
Reposted by VelleToll
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...
October 16, 2025 at 1:46 PM
Reposted by VelleToll
Emerging hemispheric asymmetry of Earth’s radiation | PNAS www.pnas.org/doi/10.1073/...
Emerging hemispheric asymmetry of Earth’s radiation | PNAS
Twenty-four years of satellite observations from the Clouds and the Earth’s Radiant Energy System show a northern hemisphere (NH) minus southern he...
www.pnas.org
October 2, 2025 at 9:49 AM
Reposted by VelleToll
📢 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...
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...
August 22, 2025 at 10:28 AM
Reposted by VelleToll
New article published today by my colleague @bjornsamset.bsky.social in Nature Comms: Earth and Environment. Evidence from eight Earth System Models that the reduction in East Asia's (primarily China's) air pollution is consistent with the sharper growth in warming.
East Asian aerosol cleanup has likely contributed to the recent acceleration in global warming - Communications Earth & Environment
Restrictions of atmospheric aerosol and precursor emissions in East Asia have contributed to the observed global surface warming acceleration since 2010, according to Earth System Model simulations is...
www.nature.com
July 14, 2025 at 12:49 PM
Reposted by VelleToll
Clean air, warmer planet? New study co-authored by NCAS's Laura Wilcox shows East Asia’s air pollution clean-up may have lifted a “cooling mask,” revealing more GHG warming.

A reminder that we must cut emissions and pollution - for climate and health.

ncas.ac.uk/east-asia-wh...
East Asia: What is the link between air pollution and global warming? - NCAS
Recent efforts to reduce air pollution in East Asia may have inadvertently contributed to a noticeable acceleration in global warming since 2010
ncas.ac.uk
July 14, 2025 at 9:39 AM
Reposted by VelleToll
What becomes of the 1.5°C goal now that global warming is approaching that level?🌍🔥🌡️

In a new @science.org Policy Forum we explain how the 1.5°C goal remains a critical legal & ethical benchmark, even as the world nears and may soon exceed 1.5°C of global warming🧵1/
www.science.org/doi/10.1126/...
The pursuit of 1.5°C endures as a legal and ethical imperative in a changing world
As the world nears 1.5°C of global warming, near-term emissions reductions and adequate adaptation become ever more important to ensure a safe and livable planet for present and future generations
www.science.org
June 23, 2025 at 1:51 PM
Reposted by VelleToll
⚠️Global warming caused by humans is advancing at 0.27°C per decade – the highest rate since records began.

This is one of the indicators updated every year by over 60 international scientists in the annual Indicators of Global Climate Change report – published today. doi.org/10.5194/essd... /1
June 19, 2025 at 8:23 AM
Reposted by VelleToll
Happy to share our paper in ‪@science.org‬ 'Observed trend in Earth energy imbalance may provide a constraint for low climate sensitivity models' | Science www.science.org/doi/10.1126/...
Observed trend in Earth energy imbalance may provide a constraint for low climate sensitivity models
Climate forcings by greenhouse gases and aerosols cause an imbalance at the top of the atmosphere between the net incoming solar radiation and outgoing longwave radiation from Earth. This Earth energy...
www.science.org
June 12, 2025 at 6:15 PM
Reposted by VelleToll
I just published an explainer on aerosols and their role in the climate that I've been working on for the past few months! It includes both how aerosols work, how emissions have changed, and how thats driven recent warming: www.carbonbrief.org/...
June 10, 2025 at 3:52 PM
Reposted by VelleToll
While global mean sea level rise over recent decades has been driven mainly by greenhouse gases, the regional pattern in the Pacific has likely resulted from sulfate aerosol emissions - with important implications for the coming decades... www.science.org/doi/10.1126/...
Pan-Pacific low-frequency modes of sea level and climate variability
Coastal sea level records suggest that Pacific Ocean sea level and climate trends are unlikely to persist over the coming decades.
www.science.org
June 2, 2025 at 8:22 PM
Reposted by VelleToll
In its new advice, the @esabcc.bsky.social reaffirms its recommendation for EU Policy: 90–95% net domestic reduction in greenhouse gas emissions by 2040 is both feasible and keeps the EU on a credible path to climate neutrality. Read the advice here: climate-advisory-board.europa.eu/news/staying...
Staying the course on climate action essential to EU security and competitiveness
climate-advisory-board.europa.eu
June 2, 2025 at 11:28 AM
Reposted by VelleToll
The doubling of the rate of global heating in recent decades has surprised the scientific community so needs to be better understood yet our capability to measure Earth's energy imbalance is at risk: doi.org/10.1029/2024...
May 12, 2025 at 9:48 AM
Factories trigger local snowfall and reduce cloud cover
New @sciencemagazine
science.org/doi/10.1126/science.adl0303
November 14, 2024 at 8:58 PM