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EUMETSAT AC SAF @ac-saf.eumetsat.int · 11/09/2026

The animation shows the Anak Krakatau eruption SO₂ plume and its altitude during 4-8 September, as observed by #IASI on Metop-B+C. 🛰️ Day/night AC SAF IASI Level 2 SO₂ total column and plume altitude observations can be accessed on the #AERIS website: iasi.aeris-data.fr/so2/

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 25/08/2026

🌋 A phase of eruptive activity started at #Etna on 6 August, with high volcanic emissions from the summit area. The animation shows the GOME-2 (Metop-B+C) daily #SO2 plume spreading over the central Mediterranean on 7-15 August 2026. #GOME2 #volcano #Sicily

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 06/08/2026

🔥 Severe #wildfires have affected #Spain and #France in recent weeks. The GOME-2 Absorbing Aerosol Index (AAI) shows smoke plumes over the countries on 25 and 26 July. The fires are among the largest in decades. They have destroyed homes, caused evacuations and burned extensive areas of land. ⚠️

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 06/08/2026

In July, there were massive fires in the Fontainebleau forest, south of Paris. These appeared in the IASI/Metop observations of carbon monoxide (CO) on July 12-14, 2026.

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 03/03/2026

#SaharanDust transport over Northern Africa in recent days has been captured by the GOME-2 (Metop-B and Metop-C) absorbing aerosol index (AAI). #CAMS forecast shows the plume moving over southern and western Europe this week. 🌬️

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 23/01/2026

GOME-2 (B+C) observations show absorbing aerosol index (AAI) plumes from wildfires over West Africa and west of Chile on 17 and 19 January, extending over the Atlantic and Pacific Oceans. Background: NASA/NOAA-21 VIIRS active fires (past 24 h) in red and GFS 800 hPa winds at 11:00 (from Ventusky).

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 21/01/2026

Tuuli Perttula takes the stage at #WSW2026 Tailored Satellite-Based Air Quality Products for Operational Weather Forecasting: Turning complex satellite data into intuitive products that support real-time air quality monitoring and forecasting.

Image showing Tuuli Perttula in front of screen and giving a talk at WSW2026. The topic of the talk is Tailored Satellite-Based Air Quality Products for Operational Weather Forecasting - Turning complex satellite and in situ data into intuitive products that support real-time air quality monitoring and forecasting.

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 26/11/2025

A transported SO2 plume from #HailyGubbi on 23-26 November, as seen by the GOME-2 instrument on the MetOp-B and MetOp-C satellites. 🌋 The volcano erupted on 23 November in Afar Region, Ethiopia.

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 28/10/2025

EUMETSAT Climate Symposium. Here we are.

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 27/10/2025

HCHO trend over Arabian Peninsula 2005-2023. Measured with GOME-2 instrument. EUMETSAT Climate Symposium starts tomorrow, see us there: www.eumetsat.int/eumetsat-cli... . #formaldehyde #HCHO #EUMETSAT #timeserie #climate

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 24/10/2025

EUMETSAT Climate Symposium is on next week, 28-30 Oct. Meet us there. Here is Merged GOME-2 tropospheric NO2 column for Western Europe for the period 01/2007 - 12/2024. #GOME-2 #EUMETSAT #NO2 www.eumetsat.int/eumetsat-cli...

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 08/09/2025

The ozone hole that exists every year, but is no longer growing. Proof that international environmental regulations and co-operation, like Montreal protocol, work ! Here we have temperatures in the polar vortex (left), and ozone concentrations (right). Time period 1 Aug - 6 Sep 2025

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 29/08/2025

To extend the life of Metop-B, five satellite maneuvres are planned in September. The first maneuver is planned on Tue 2 Sep, with the following instrument outages (~ 2 orbs): IASI 07:12:41-13:06:45 GOME-2 10:25:24-13:49:13. The nexts are planned for 9, 16, 23 and 30 Sep. Image: ESA/AOES Medialab

Artistic view of the Metop satellite with extended solar panels flowing over earth where clouds are visible.

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 16/06/2025

The #IASI reprocessed #ozone data record is released. Contains both total ozone and ozone profiles data. The EUMETSAT IASI L2 T and H2O are part of the data. Stable, high-quality data for climate studies, consistent with the NRT processing. DOI: 10.15770/EUM_SAF_AC_0051 acsaf.org/datarecords/...

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 02/06/2025

#Wildfires in #Canada have emitted massive amount #smoke that is clearly visible in GOME-2 (B+C) #AAI observations. Long range transportation over northern #Atlantic. AAI data either from #EUMETCast or SAF archive acsaf.org/products/arp...

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 13/05/2025

The Global 1-day UV Index Forecast is released today. This version have a three-layer cloud cover forecast from ECMWF, which provides cloud cover fractions for low-, medium-, and high-altitude clouds. Clear improvement over the previous single-layer cloud correction. acsaf.org/products/nuv...

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 13/05/2025

Did you know that cloud corrected European #UVI and #Erythemal daily dose from EUMETSAT's MSG #SEVIRI (2004-2024) and MTG #FCI (2025->) data are available. 15 min time resolution. Data, maps and #overpasses available. Images and overpasses acsaf.org/euv_validation/index.php

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 13/05/2025

Did you know that cloud corrected European #UVI and #Erythemal daily dose from EUMETSAT's MSG #SEVIRI (2004-2024) and MTG #FCI (2025->) data are available. 15 min time resolution. Data, maps and #overpasses available. Data: acsaf.org/products/euv... , images and overpasses acsaf.org/euv_validati...

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 29/04/2025

Here are examples of GOME-2 B&C Level 3 Tropospheric NO2 for two African cities, Nairobi and Casablanca, annual mean 2024. NO2 is produced mainly in combustion of fossil fuels (coal, gas and oil) and especially fuel used in cars. Click images to get larger view.

Nairobi and it's surrounding area. The high NO2 values are over the city itself and the other heavily populated areas near Nairobi. The NO2 values over countryside are much smaller due to lacking traffic.

Casablanca, Marocco, and it's surrounding area. The high NO2 values are over the city itself and the other main cities along the coast like Rabat, Agadir and inland cities like Marrakesh. The NO2 values over countryside and Atlantic sea are much smaller.

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 14/03/2025

Directional #Lambertian-Equivalent #Reflectivity (DLER) version 4.1 is finally released. It has been available as demonstrational product a while, but now we can announce the official release. Added wl, improved errors, directionality and quality. Download and have a try! acsaf.org/datarecords/...

Announcement of the release of the Lambertian-Equivalent Reflectivity (DLER) v4.1 product.
Spatial Coverage: Global
01/2007 - 08/2022 (MSC) and 03/2008 - 08/2022 (PMD)
GOME-2 onboard Metop-A, B and C
Data amount increased 1.8 times from the previous version
Quality improved both for MSC and PMD
Directionality improved (more stable)
Added 747 nm wavelength band for MSC
Improved uncertainties
NetCDF4 file sizes: MSC: 2.3 GB, PMD: 1.6 GB
Dissemination via AC SAF archive
DOI: 10.15770/EUM_SAF_AC_0050

Image of global MSC-DLER 772 nm.

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 19/02/2025

@eumetsat.bsky.social SAF Network meeting to plan the next phase for 2027-2032. New products, new services.

People standibng in front of screens in Open Space excercise and having ideas for the next sessions

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EUMETSAT AC SAF @ac-saf.eumetsat.int · 05/02/2025

Demonstrational IASI dust optical depth available via EUMETCast. More info and instructions: acsaf.org/products/ias...

Short text with an image telling that the Demonstrational Dust Optical Depth from IASI is available:
Dust optical depths at 10µm with associated estimated errors
Metop B and C platforms, IASI instrument
Global spatial coverage
NetCDF4 file format
The product files are available to users every day. Morning (day) and evening (night) overpasses included.
Algorithm V9.0 (neural network)
Includes a quality flag, value 1 indicating the most reliable observations
Dissemination via EUMETCast
Contact: helpdesk@acsaf.org

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