Amazing science, so much detail from Earth Observations, Eloise Marais reminds us that the cloudiness of the UK, makes it one of the biggest challenges for extracting atmospheric chemical information.

Day 1 of the 5th EU #CleanAirEU Forum was packed with discussions on how to improve air quality across Europe. @ecmwf.int

The 2025 Antarctic #OzoneHole closed today, 1 Dec. – the earliest since 2019 and the smallest & shortest-lived in 5 years. Do you know how #CopernicusAtmosphere tracks ozone hole development? Or how global efforts are making a difference? Find out here: atmosphere.copernicus.eu/smallest-and...

My last MIT student, Joe, explored what controls the ozone formed in fire plumes. His paper is out today in ACP. Happy Thanksgiving! acp.copernicus.org/articles/25/...

🌤️ Europe’s air is improving, but 180,000+ EU deaths in 2023 were linked to PM2.5 above WHO levels. 95% of city residents still face unhealthy air. More in our new EEA assessment: www.eea.europa.eu/en/newsroom/...

Sentinel-4 & Sentinel-5 features will be demonstrated at the 5th Clean Air Forum, highlighting their vital role in CAMS monitoring of key air quality trace gases & aerosols, offering timely, high-res data over Europe. 🔗 atmosphere.copernicus.eu/sentinel-5-m... #CopernicusAtmosphere #ECMWF

Satellite imagery shows multiple #fire clusters in #Azerbaijan and #Armenia generating a broad, merged smoke layer. The thick regional haze indicates elevated particulate loads and significant cross-border #atmospheric transport. 🔥🌬☁️🌀🌏 #AirQuality 😷 🛰 #NASA ✂️Visualized @zoom.earth

[CORRECTED] Volcanic activity at Erta Ale, Ethiopia, in this Copernicus Sentinel 2C satellite image from 23 November. Combination of visual channels + SWIR

Our #CopernicusAtmosphere Assessment Report on European Air Quality shows that levels of key pollutants NO₂, PM2.5 & PM10 were lower in 2024 than most of the previous ten years. At the 5th EU Clean Air Forum, stakeholders are working together to advance clean air policy. @ecmwf.int ⬇️

Updated animation of #CopernicusAtmosphere daily mean PM2.5 surface concentration forecasts showing development of Indo-Gangetic Plain #AirPollution between 1-27 November. More info/#OpenData access: ads.atmosphere.copernicus.eu/datasets/cam... #airquality @copernicusecmwf.bsky.social @ecmwf.int

Updated animation of #CopernicusAtmosphere daily mean PM2.5 surface concentration forecasts showing development of Indo-Gangetic Plain #AirPollution between 1-27 November. More info/#OpenData access: ads.atmosphere.copernicus.eu/datasets/cam... #airquality @copernicusecmwf.bsky.social @ecmwf.int

The final two papers in our series of publications to mark ECMWF’s 50th anniversary are now available: ➡️ Fifty years of meeting users’ needs (4.17 MB) www.ecmwf.int/sites/defaul... ➡️ Machine learning for numerical weather prediction (2.82 MB) www.ecmwf.int/sites/defaul...

🌍 Discover how ECMWF’s 2025 @codeforearth.bsky.social projects harnessed #CopernicusAtmosphere and #CopernicusClimate data to drive open-source innovation in Earth system modelling. Read the articles: 🔴 climate.copernicus.eu/code-earth-2... 🔵 atmosphere.copernicus.eu/ecmwf-code-e...

📉 Global annual total estimated emissions of total carbon from biomass burning from 2003 to 2025 – CAMS 📉 High PM2.5 levels across the Po Valley on 12 November – @adamplatform.bsky.social 📉 Biomass burning aerosol forecast initiated on 6 September – Ernesto Barrera / @aemet.es

An impressive view of the long SO₂ plume from the #HayliGubbi #volcano eruption in #Ethiopia. The #Copernicus #Sentinel5P map of Nov. 25th shows its trajectory stretching from #Africa all the way across #India and #China for more than 6000 km. #AirQuality

First global images from Sentinel-5A highlight the ozone hole, pollution hotspots, wildfire & volcanic emissions & more! High-res imaging from Sentinel-5A advances global air quality monitoring & strengthens #CopernicusAtmosphere data insight. Read the article about Sentinel-5 ⬇️

The last - but certainly not least - instrument on board Metop-SGA1 to share its 1st images has now delivered! Data from #Sentinel5 was unveiled today at @esa.int's Ministerial Council where EUMETSAT joined ESA & @ec.europa.eu to showcase Earth's air quality from space: bit.ly/4rnIRBi 🧵

Modelling stratospheric composition for the #CopernicusAtmosphere Monitoring Service: multi-species evaluation of IFS-COMPO Cy49 by Chabrillat et al. published in @egu.eu Geoscientific Model Development gmd.copernicus.org/articles/18/... #AtmosChem @copernicusecmwf.bsky.social @ecmwf.int

Before–after satellite images of the #HayliGubbi🔺🌋 #eruption reveal a stark shift in terrain tones. Dark bands near the crater show heavy, coarse ash fallout, while lighter outer zones mark fine ash carried by winds—clear evidence of a powerful, wide-reaching eruption. 1/2 🧵

The 5th EU Clean Air Forum from 1-2 Dec. will highlight advances in satellite data, AI-driven air monitoring, policy innovation & more during the 2025 edition co-hosted by #ECMWF and @ec.europa.eu in Bonn. See the agenda ➡️ environment.ec.europa.eu/document/dow... #CopernicusAtmosphere

UK wildfires devastated more areas in 2025 than at any time since records began, figures show

🔴⚠️🌋🇪🇹After more than 10000 years,the 1st historical #eruption of #HayliGubbi #volcano has occurred in E. #Ethiopia, producing an eruptive column that reached more than 18km of height on Nov.23.⬇️Meteosat12 animation of RGB Ash product of the huge gas & ash plume moving eastward.

The plume from the #HayliGubbi 🌋eruption 🇪🇹 is shown clearly in #CopernicusAtmosphere 24 Nov 00 UTC total column SO2 forecast atmosphere.copernicus.eu/charts/packa.... Based on assimilation of @dlrso2.bsky.social obs assuming initial injection at ~5 km @copernicusecmwf.bsky.social @ecmwf.int

Sentinel-5P #TROPOMI measurements at ~11:00 UTC show most of the SO₂ emissions from #HayliGubbi spreading east in the upper troposphere. Plume contains ~44 kilotons of SO₂ (~0.04 Tg).

An eruption from the #HayliGubbi volcano in #Ethiopia resulted in a large ash cloud, visible here from space. 🌋 This impressive view was seen 36,000km above Earth by our Meteosat-12 satellite on 23 November at 13:40 UTC.

Some Meteosat views from of the ejections from the eruption of the Hayli Gubbi #volcano in Ethiopia, via @inorbitivan.bsky.social & Jochen Kerkmann

The eruption after thousand of years of #HayliGubbi #volcano in #Ethiopia. According to analyses, part of the eruptive column from the eruption may have reached an altitude between 18 and 20 km. The #Copernicus #Sentinel5p image on Nov. 23 shows the big plume moving eastward.

Great episode of the @arcticcouncil.bsky.social This Way Up podcast on The Arctic on Fire www.highnorthnews.com/en/arctic-fire featuring @gwandaii.bsky.social @woodwellclimate.bsky.social @permafrostpathways.bsky.social @highnorthnews.bsky.social #wildfires #ArcticFire

Zombie fires: how Arctic wildfires that come back to life are ravaging forests by @phoebeweston.bsky.social & @pgreenfielduk.bsky.social with input from @loridanielsubc.bsky.social in @environment.theguardian.com www.theguardian.com/environment/... #ArcticFire #ArcticFires #wildfires

Our latest Collaborator Highlight features @toolikfieldstation.bsky.social, a valued partner of the Arctic Data Center and a major hub for Arctic research. Read more here: arcticdata.io/all/news/202... ❄️🌱

📢 Grant deadline extended to 3 December! Drive uptake of #CopernicusAtmosphere data, build capacity & foster collaboration to address atmospheric challenges & impacts via the National Collaboration Programme (NCP). Learn more & apply: atmosphere.copernicus.eu/grants

Two years in the Amazon taught Dr Michel Valette (CEP & @centrewildfires.bsky.social) one thing: Indigenous communities adapt to wildfires with incredible resilience. Now they need urgent support for community-led fire prevention. #COP30 🌱

We’re hiring a postdoctoral atmospheric scientist! Help analyse satellite data from TROPOMI and GHGSat, trace methane emissions to their sources and support global mitigation efforts. werkenbijsron.nl/en/vacancies... #emissions #earthobservation #sronspace

How does the CAMS Methane Hotspot Explorer detect high-emission methane plumes from space? Senior Scientist at Space Research Organisation Netherlands (SRON - @sronspace.bsky.social), Ilse Aben explains the machine learning behind it. Watch the video. #CopernicusAtmosphere

I contributed an article to the Canada Wildfire newsletter! Check out the Fall 2025 issue here: www.canadawildfire.org/newsletter

“Emissions of greenhouse gas methane from lakes & reservoirs risk doubling by the end of the century due to climate change. This in turn could raise Earth's temperature more than suggested by IPCC's current worst-case scenario.” Solutions still have time - we reduce CO2! phys.org/news/2025-11...

Great episode of the @arcticcouncil.bsky.social This Way Up podcast on The Arctic on Fire www.highnorthnews.com/en/arctic-fire featuring @gwandaii.bsky.social @woodwellclimate.bsky.social @permafrostpathways.bsky.social @highnorthnews.bsky.social #wildfires #ArcticFire

Welcome to This Way Up, the new Arctic Council podcast. In this introductory episode, hosts Jessica Cook and Rosa-Máren Magga set the stage for the season ahead. #podcast #ThisWayUp #Arctic @arcticcouncil.bsky.social

📢 Don't miss this opportunity to advance the #CopernicusAtmosphere system for tracking greenhouse gases. Improve the land surface processes enhancing (CO₂) and methane (CH₄) modelling. Deadline: 15/01/2026 atmosphere.copernicus.eu/cams252abis-...

Track daily CO₂ emissions by country, city and sector with the Carbon Monitor Europe (CM-EU) app. Filter, compare and explore daily, weekly and seasonal variations with near-global coverage. Explore the app: atmosphere.copernicus.eu/ghg-services... #CopernicusAtmosphere

Understanding what’s in the air we breathe is the first step toward reducing exposure and improving health outcomes. Check out the new tool, PM dashboard 🖥️we upgraded over this summer here 👉 aerosolscienceerg.shinyapps.io/Landing_Page/ #AirQuality #CleanAir #PM25 #PublicHealth

Published today: our new paper showing a 44-year trend of increasing global wildfire disasters (fatalities and economic losses) due to climate change-induced extreme weather. www.science.org/doi/10.1126/...

Large dust outbreak over Argentina & the Atlantic, seen in this Met-12 FCI Dust RGB loop (bright pink area), from 17 Nov 14UTC-18 Nov 12UTC. Also, high level mountain wave clouds (lee waves) can be seen over the Andes. Via EUMETView/Jochen Kerkmann #remotesensing #earthobservation

Laurence Rouil, CAMS Director, highlights the evolution of CO₂ in the atmosphere & how it is driven by human activity & impacts climate change. "With this, I hope global leaders are equipped with the insight to turn ambition into action." #CopernicusAtmosphere #COP30

The Congo basin may be the world’s most important rainforest – why is it the least researched?

The Copernicus In Situ Component highlights the collaboration between #CopernicusAtmosphere & ICOS (@icos-ri.eu) to monitor greenhouse gas emissions. In-situ & satellite data deliver vital insights for the #ParisAgreement goals. Read more: insitu.copernicus.eu/news-and-eve...

🧪🛰️🌍💨 This morning over southern S. America, #highlatitudedust emitted yesterday during the massive wind storm in central Patagonia is well on its way northbound, probably the city of Buenos Aires sometime today. (see previous posts for more)

🌎At COP30, our Director-General Florence Rabier highlighted how closing critical weather and climate data gaps improves forecasts, reduces disaster losses and supports global climate adaptation. ➡️https://www.ecmwf.int/en/about/media-centre/2025/ecmwf-cop30 #COP30

International collaboration drives daily, integrated global air quality forecasts. Hear from Guy Brasseur, Senior Scientist and Group Leader at Max Planck Institute for Meteorology, as he explains how Europe is leading progress in atmospheric modelling. #CopernicusAtmosphere

🔥New in IJWF: Desservettaz et al. provide a comprehensive review addressing Australian firefighters’ concerns about bushfire smoke. The article outlines health risks, gaps in PPE protection, off-gassing, dermal exposure, and mitigation strategies. 🔗 doi.org/10.1071/WF25138 #IJWildlandFire