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European Centre for Medium-Range Weather Forecasts
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@ecmwf.intOne 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.
@copernicusecmwf.bsky.socialReposted by @ecmwf.int🔥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.
@ecmwf.intBehind 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...
@ecmwf.int14 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...
@copernicusecmwf.bsky.socialReposted by @ecmwf.int🌫️ 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
@ecmwf.intCAMS 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. ⬇️
@mparrington.bsky.socialReposted by @ecmwf.intIt 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.
@ecmwf.intPolytope 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.
@ecmwf.int🌍🌐 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....
@copernicusecmwf.bsky.socialReposted by @ecmwf.int📣 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
@ecmwf.int🌍🌐 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...
@ecmwf.intCode 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/
@ecmwf.intUsers 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...
@ecmwf.intCode 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/
@ecmwf.intThat'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
@ecmwf.int📢 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
@ecmwf.intFinal 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
@wmo-global.bsky.socialReposted by @ecmwf.intRivers 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
@ecmwf.intThe 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.
@ecmwf.intWhat 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
