Copernicus ECMWF

Copernicus ECMWF The Change Service ( ) & Monitoring Service (CAMS), implemented by ECMWF on behalf of the European Commission.

18/06/2026

Our recent CAMS regional ensemble ozone forecasts are showing increased ground-level concentrations for Europe, with potential consequences for public health, for the coming days.

🩺 Ozone can irritate lungs, worsen asthma, and even impact vegetation and ecosystems, reducing crop yields.

📈 CAMS data shows that several regions of Europe, including southern Scandinavia, Germany, northern Italy and the central Mediterranean, will experience ground-level ozone concentrations exceeding the EU Ambient Air Quality Directive target of 120 μg/m3 on 19-20 June.

Explore the forecast: https://atmosphere.copernicus.eu/charts/packages/cams_air_quality/products/europe-air-quality-forecast-regulated

What triggers this ozone pollution?

☀️ High temperatures and sunlight trigger ozone formation, which explains the occurrence of high concentration ozone episodes during heat waves like the one starting now.

More details on ozone pollution: https://atmosphere.copernicus.eu/ozone-pollution-air-quality-hazard-summer

16/06/2026

Summer is almost here. Do you want to see how today’s weather compares with the past?

With Weather Replay from , you can explore past weather around the world, hour by hour, from 1940 to just a few days ago. From summer heatwaves to major storms, the app helps you revisit weather events in a simple and visual way.

Read more: https://climate.copernicus.eu/weather-replay-your-time-machine-revisit-past-weather

🌍 Delve into the May 2026 Climate Bulletin.Swipe through key climate highlights from the month, including: the second-...
10/06/2026

🌍 Delve into the May 2026 Climate Bulletin.

Swipe through key climate highlights from the month, including: the second-highest global and sea surface average temperature for May, a rapid shift from colder-than-average to warmer-than-average conditions in Europe followed by an unusually early
heatwave, below-average river flow across much of central, eastern and northeastern Europe, and the fourth-lowest Arctic sea ice extent for May.

Explore the full bulletins: https://climate.copernicus.eu/climate-bulletin?utm_source=socialmedia&utm_medium=FB&utm_campaign=climate-bulletins&utm_id=CB-05-2026

It’s and we have exciting news from ECMWF!The upcoming release of ORAS6 marks an important step forward in how past oc...
08/06/2026

It’s and we have exciting news from ECMWF!

The upcoming release of ORAS6 marks an important step forward in how past ocean and sea-ice conditions are reconstructed. By improving how we track sea-surface temperature, sea ice and ocean circulation, ORAS6 helps strengthen forecasts and climate monitoring, improving our understanding of the world we live in and boosting climate resilience.

Read more on the ECMWF website: https://climate.copernicus.eu/world-oceans-day-learn-about-oras6-next-generation-ocean-reanalysis

05/06/2026

A weather forecast that changed history.

On 4 June 1944, meteorologists confirmed that stormy conditions in the English Channel would put the planned 5 June Normandy landings at risk. That forecast led General Dwight Eisenhower to delay the invasion by 24 hours, until a short window of quieter weather made the operation possible.

Using the new Weather Replay app from , you can reconstruct those conditions and revisit past weather events around the world, hour by hour, from January 1940 to just a few days before the present.

As the D-Day anniversary approaches, and in the wake of the US release of the film 'Pressure,' explore the app and discover how weather forecasting shaped one of the most important military operations in history.

Read the article: https://climate.copernicus.eu/new-d-day-weather-reconstruction-highlights-key-driver-military-success-and-security

03/06/2026

The Copernicus Atmosphere Monitoring Service (CAMS) has been tracking a large Saharan dust plume that has stretched across the Atlantic from the west coast of Africa towards the Americas.

CAMS data shows that large parts of the Caribbean are most impacted – including the Lesser Antilles, Puerto Rico, Cuba, Haiti, the Dominican Republic, Jamaica, and the Cayman Islands. The plume is contributing to declining visibility and air quality with increased ground-level concentrations of PM10 across a large part of the region.

The most recent 5-day forecast also shows the dust plume recirculating across the North Atlantic towards the Azores and southwestern Europe in the next few days, and may result in slightly hazy skies, especially at sunset.

Follow the global aerosol forecast on our website at atmosphere.copernicus.eu

Global atmospheric concentrations of greenhouse gases carbon dioxide (CO₂) and methane (CH₄) continued to increase in 20...
30/05/2026

Global atmospheric concentrations of greenhouse gases carbon dioxide (CO₂) and methane (CH₄) continued to increase in 2025, based on satellite estimates.

Preliminary analyses reported in the European State of the Climate 2025 indicate that the 2025 annual average was the highest in the satellite record for both gases. Since 2020, the global average CO₂ concentration has increased by about 2.6 parts per million (ppm) per year, and CH₄ concentration by about 11.6 parts per billion (ppb) per year.

Net emissions of CO₂ and CH₄ have been increasing over recent decades, with year‑to‑year variation.

Explore the findings in the European State of the Climate 2025 report, published jointly by ECMWF and the World Meteorological Organization (WMO).

🔗 https://climate.copernicus.eu/esotc/2025/greenhouse-gases-driving-climate-change?utm_source=socialmedia&utm_medium=FB&utm_campaign=european-state-of-the-climate-2025&utm_id=ESOTC-2025

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