ECMWF

The Joint CP-TT/DA-TT Workshop starts today at ECMWF in Reading. The event brings together the ocean prediction and DA communities to discuss scientific advances and challenges in improving prediction systems. ➡️ oceanpredict.org/events/joint...

Based on satellite imagery provided by GHGSat for CAMS, the large methane leak observed in eastern Niger earlier this month has been contained. CAMS analysis confirms that the methane plumes stopped on 20 October. Read more: atmosphere.copernicus.eu/copernicus-a... @ecmwf.int

🎉 20 years of TIGGE. TIGGE has enabled researchers worldwide to compare ensemble forecasts, improve weather prediction, and better understand forecast uncertainty. Proud that ECMWF has played a key role as one of the archive hosts for this international collaboration. www.ecmwf.int/en/about/med...

🌍 #COP31 Türkiye is fast approaching. Experts, policymakers and organisations from around the world will soon come together to discuss solutions for a more resilient future. Our delegation will participate in various panel discussions and meetings. More updates coming soon.

ECMWF’s 9 km data is now free and open. The move will give more people access to accurate and localised forecasts. The resolution can make the difference, for example, between predicting rain in a large area and knowing which valley it will land in. Read more ➡️ www.ecmwf.int/en/about/med...

The summer of 2026 was exceptionally warm across western Europe, with several record-breaking heatwaves. In the latest Science Blog, ECMWF Senior Scientist Linus Magnusson reviews ECMWF’s prediction of these unusual summer temperatures. ➡️ www.ecmwf.int/en/about/med...

Introducing AIFS-COMPO, a new data-driven forecasting system for global atmospheric composition up to 10 days ahead. Adapting ECMWF’s AIFS to aerosols and reactive gases, AIFS-COMPO is trained on data from the Copernicus Atmosphere Monitoring Service. ➡️ www.ecmwf.int/en/about/med...

Today is #WorldFoodDay 🇺🇳 The World Food Programme (WFP) uses ECMWF data to monitor risks to food security globally. Our forecasts help WFP identify areas likely to experience drought or flood conditions, estimate populations at risk of food insecurity, and trigger anticipatory actions programmes.

ECMWF scientists have extended AIFS to jointly forecast the atmosphere, ocean waves, sea ice and key surface-ocean fields. The resulting prototype, AIFS Marine, expands the model state with a compact set of variables representing the surface ocean and sea ice. ➡️ www.ecmwf.int/en/about/med...

This week, ECMWF is taking part in Brussels Climate Week, joining policymakers, industry leaders, researchers and other key stakeholders to discuss how trusted weather, climate and environmental information can support a more resilient and sustainable Europe. ➡️ www.ecmwf.int/en/about/med...

One month to go until #COP31 🌍 ECMWF is a UNFCCC Observer and will be attending this year’s United Nations Climate Change Conference, which takes place from 9 to 20 November 2026 in Antalya. Our delegation will participate in various panel discussions and meetings, including Earth Information Day.

🔥Wildfire emissions can affect air quality far from where fires are burning. During summer 2026, several smoke plumes from North America crossed the Atlantic towards Europe, while fires in Indonesia exposed populations to very high PM2.5 concentrations.

Behind every weather forecast lie millions of observations gathered from satellites, aircraft, ships, buoys and other instruments. ECMWF monitors these instruments throughout their lifecycle, from their rollout and evaluation through to their retirement. Read more ➡️ www.ecmwf.int/en/about/med...

14 teams from across Europe and Africa presented innovative solutions to real-world weather, climate and environmental challenges at the Code for Earth Final Day 2026, held at ECMWF's headquarters in Reading, UK, on 23 September. Read more ➡️ www.ecmwf.int/en/about/med...

🌫️ Air pollution knows no borders. Around 2 billion tonnes of sand & dust enter the atmosphere every year. In 2026, smoke from North American wildfires regularly reached the Arctic & crossed the Atlantic to Europe. Explore the CAMS #AtmosphereWatch: atmosphere.copernicus.eu/air-quality/... @ecmwf.int

CAMS Atmosphere Watch 2026 report is out now! This report was compiled by the Copernicus Atmosphere Monitoring Service (CAMS), which is implemented by ECMWF. It provides an overview of key topics in air quality and atmospheric composition. ⬇️

It was an honour to contribute to this @africacleanair.bsky.social webinar and present a short overview of the work we do in the Copernicus Atmosphere Monitoring Service and how to access our open data in the context of African air quality. @copernicusecmwf.bsky.social @ecmwf.int

Polytope is our data-access system for extracting specific features directly from large datasets. It can substantially reduce transfer volumes & simplify workflows, changing the user experience. https://www.ecmwf.int/en/about/media-centre/focus/2026/polytope-making-access-weather-and-climate-data

🌍🌐 Registration for Course 3 of our ML training series under the EU DestinE initiative is now open. Explore explainability, foundation models, hybrid modelling, downscaling, coupled Earth systems and AI forecasting pipelines. 📅 5 October | Online Register now: learning.ecmwf.int/course/view....

📣 Mark the date! On 30 September, #CopernicusAtmosphere will release the first edition of CAMS #AtmosphereWatch, a new publication exploring how ground-level ozone, wildfire smoke & dust plumes travel across borders & affect air quality far from their sources. Stay tuned! @ecmwf.int @ec.europa.eu

🌍🌐 Our new animation explores the development of the AI-based sea ice component, a key step towards a fully driven machine learning (ML)-driven Earth system model within the Destination Earth (DestinE) initiative of the European Commission. Watch the full animation: destine.ecmwf.int/video/destin...

Code for Earth Final Day 2026 takes place tomorrow! It will feature live presentations from all 14 developer teams, sharing their final results and takeaways while turning climate data into working tools. Livestream & programme here ➡️ https://codeforearth.ecmwf.int/code-for-earth-final-day-2026/

Users of ECMWF data now have the option of signing up for direct delivery of the ERA5T reanalysis data via ECMWF's Product Requirements Catalogue. ERA5T is an initial release version of ERA5, issued every day, 5 days behind real time. Read more ➡️ www.ecmwf.int/en/about/med...

Code for Earth is an innovation programme run by ECMWF. Next week, Code for Earth 2026 celebrates its final milestone with an event featuring live presentations from the 14 participating teams. Register to participate online ➡️ https://codeforearth.ecmwf.int/code-for-earth-final-day-2026/

That's a wrap for the 2026 Annual Seminar! Thank you to all our speakers for sharing their expertise, and to everyone who joined us throughout the week. Missed a session? Recordings and presentation slides are now available:  https://ecmwfevents.com/i/annual-seminar-2026/public/agenda

📢 1 week left to register! The workshop on software strategies for sustainable physical modelling will explore how we can build sustainable, adaptable and innovative modelling systems. 🗓️ Deadline: 25 September 2026 ➡️https://events.ecmwf.int/event/529/

Final day at our Annual Seminar This week’s journey: 🛰️ DA: foundation of modern forecasting 🤖 ML: improving systems 🌍 AI: exploring what comes next This morning from 09:00 BST we look at the future of data assimilation in the age of AI. Join live ➡️ https://ecmwfevents.com/i/annual-seminar-2026

Rivers across the globe in 2025 had one of the driest years in more than 3 decades. The WMO Global #StateOfWater Report 2025 shows a continuation of the long-term decline in Earth’s freshwater storage and in glacier retreat. 🔴 OUT NOW: https://bit.ly/WMOStateOfWater2025pr

The State of Global Water Resources 2025 report of the @wmo-global.bsky.social is out now. ECMWF supported the report’s assessment of river discharge conditions worldwide with river flow data from two global modelling systems: GloFAS and ecLand-CaMa. ➡️ wmo.int/resources/pu... #StateOfWater

What if AI could transform observations into forecasts without traditional Data Assimilation (DA) steps? At our Annual Seminar experts explore the next frontier: 🤖 ML systems beyond DA enhancement 🌍 New approaches to Earth system prediction Watch live: https://ecmwfevents.com/i/annual-seminar-2026

On the International Day for Preservation of the Ozone Layer, we highlight the value of atmospheric monitoring & scientific research in supporting worldwide action. #CopernicusAtmosphere provides near-real-time information to track ozone-layer recovery. 🔗 atmosphere.copernicus.eu/protecting-e...

Today at the Annual Seminar we explore the observations behind better forecasts. Topics include: 🛰️ Next-generation satellites 🌍 Future observation systems Better observations are the foundation for better predictions. Watch live from 09:00 BST ➡️ ecmwfevents.com/i/annual-sem...

ECMWF's supercomputing & cloud services are two parts of one ecosystem. The high-performance computing facility runs our operational forecasting systems and prepares future ones. Our cloud services facilitate access to data, experimenting and developing applications. www.ecmwf.int/en/about/med...

Our Annual Seminar continues today at 09:00 BST. Join us to explore how Data Assimilation continues to evolve to support better forecasts. Follow live from 09:00 BST ➡️ ecmwfevents.com/i/annual-sem...

In 2025, major air pollution episodes arose from weather conditions, emissions from human activities and natural sources. A new Copernicus Health Hub article explores why short-term air pollution matters for health and how #CopernicusAtmosphere information can support preparedness. Read more ⬇️

Data Assimilation remains a cornerstone of operational forecasting. Find out more by following our Annual Seminar which starts today at 13:30 BST. 💻 Watch live ➡️ ecmwfevents.com/i/annual-sem... Programme ➡️ ecmwfevents.com/i/annual-sem...

Now available in the Climate Data Store: aggregated climate indicators for Europe from 1940 to 2100, derived from reanalysis and multi-model climate projections. Data support the European Climate Data Explorer (ECDE). Explore: cds.climate.copernicus.eu/datasets/sis... @ecmwf.int

Global #wildfires & #openburning for August 2026 in #CopernicusAtmosphere Monitoring Service GFAS data confluence.ecmwf.int/spaces/CKB/p.... Continued large-scale N America/Siberia fires & increasing Indonesia fires stand out + seasonal tropical fires @copernicusecmwf.bsky.social @ecmwf.int

Next week, join scientists and experts from around the world as they discuss “Advancing the assimilation of Earth system observations with new methodology and Machine Learning” at the ECMWF Annual Seminar 2026. 📺 Livestream starts Monday, 14 September, at 13:30 BST. ➡️ events.ecmwf.int/e/AS2026

🌡 August #C3S Climate Bulletin reports that August was the joint-warmest month on record & 1.65°C above the estimated pre-industrial level. Western Europe saw its warmest summer on record, while the average sea surface temperature across the extra-polar ocean was also the joint highest on record. ⬇️

Africa Clean Air Network, State of Global Air & #CopernicusAtmosphere have released the Africa Air Quality Brief 2026. Combining data & expertise, it examines fine particulate matter across the continent. 🔗 Discover more: atmosphere.copernicus.eu/air-quality-... @ecmwf.int @heisoga.bsky.social

The spatio-temporal downscaler is a flow-matching model, a generative ML technique, trained using the Anemoi framework. It is trained on ERA5 and transforms fields with low spatial and temporal resolution into higher-resolution, hourly sequences. ➡️ www.ecmwf.int/en/about/med...

🌍🌐 Course 2 of our Machine Learning for Earth Systems Modelling series has concluded and Course 3 is coming next. Developed under the EU’s Destination Earth initiative, the final course explores ML applications across weather, climate and Earth system modelling. ➡️ destine.ecmwf.int/news/machine...

This summer the Copernicus Atmosphere Monitoring Service (CAMS), which is implemented by ECMWF, released the Assessment Report on European Air Quality 2025. On the International Day of Clean Air for blue skies, take a look at some of the key findings ⬇️ atmosphere.copernicus.eu/cams-release...

ECMWF is taking part in this year’s Annual Meeting of the European Meteorological Society in Utrecht, the Netherlands, and online. Our staff are participating in a broad range of sessions, covering topics from AI and physics-based forecasting to hydrology. ➡️ www.ecmwf.int/en/about/med...

ECMWF is preparing for its next HPC facility, planned for installation in 2027. It will be designed to support physics-based and AI-based forecasts and provide resources for training machine-learning models, reflecting the growing role of AI in weather forecasting. www.ecmwf.int/en/about/med...

Global total estimated fire emissions were slightly below average for August 2026. However, Indonesia recorded its highest August monthly total estimated emissions since at least 2003, contributing to the highest monthly fire emissions for Asia.

The summer 2026 issue of the ECMWF Newsletter is now available. As well as news about ECMWF staff and events, it features articles about new developments and the use that can be made of ECMWF products. www.ecmwf.int/en/about/med...