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ac-saf.eumetsat.int
EUMETSAT AC SAF
@ac-saf.eumetsat.int
73 followers 15 following 15 posts
This is the official account for the @ac-saf.eumetsat.int
Satellite Application Facility on Atmospheric Composition Monitoring (AC SAF)
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ac-saf.eumetsat.int
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.
November 26, 2025 at 8:23 PM
ac-saf.eumetsat.int
EUMETSAT Climate Symposium. Here we are.
October 28, 2025 at 10:20 AM
ac-saf.eumetsat.int
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
October 27, 2025 at 8:38 AM
ac-saf.eumetsat.int
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...
October 24, 2025 at 11:21 AM
ac-saf.eumetsat.int
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
September 8, 2025 at 11:40 AM
ac-saf.eumetsat.int
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.
August 29, 2025 at 10:31 AM
ac-saf.eumetsat.int
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/...
A PNG image that gives details of the released products: Title: IASI L2 ozone profile and total ozone Climate Data Record released Spatial Coverage: Global IASI Metop-A and B and B instruments: IASI-A: 10.07.2007 – 31.12.2019 IASI-B: 20.02.2013 – 31.12.2023 FORLI v20151001 NetCDF4.0 Format, 13-14 orbits per day, about 35MB each Dissemination from the EUMETSAT User portal (see DOI) More info: https://acsaf.org/datarecords/iasi_o3_cdr.php Licence CC-BY-4.0 DOI: 10.15770/EUM_SAF_AC_0051 WWW address and e-mail address: http://ac-saf.eumetsat.int helpdesk@acsaf.org Short description: The IASI reprocessed ozone climate data record includes ozone profiles and meteorological variables reprocessed with the last version of the Eumetsat Level 2 processor and the version v20151001 of FORLI software. It provides stable, high-quality data for climate studies and its results are consistent with those of the NRT processing. This CDR can be used to estimate ozone trends relevant to air quality and climate studies, to monitor the evolution of the Antarctic ozone layer
June 16, 2025 at 6:56 AM
ac-saf.eumetsat.int
#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...
June 2, 2025 at 3:13 PM
ac-saf.eumetsat.int
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...
May 13, 2025 at 12:59 PM
ac-saf.eumetsat.int
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
May 13, 2025 at 8:14 AM
ac-saf.eumetsat.int
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...
May 13, 2025 at 8:06 AM
ac-saf.eumetsat.int
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.
April 29, 2025 at 10:06 AM
ac-saf.eumetsat.int
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.
March 14, 2025 at 1:48 PM
ac-saf.eumetsat.int
@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
February 19, 2025 at 1:53 PM
ac-saf.eumetsat.int
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
February 5, 2025 at 7:23 AM