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cm-saf.eumetsat.int
EUMETSAT CM SAF
@cm-saf.eumetsat.int
59 followers 37 following 40 posts
We provide satellite-based Climate Data Records to support climate monitoring and adaptation. https://cm-saf.eumetsat.int
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cm-saf.eumetsat.int
☀️ At the EUMETSAT Climate Symposium, @meteofrance.com showed how CM SAF SARAH sunshine duration data provide far more detailed national maps than ground-based networks alone. A great example of the added value of satellite-based climate data!
Comparison slide from @meteofrance.com showing two sunshine duration maps of France – one based on ground stations, the other using CM SAF SARAH satellite data, which reveals much finer spatial detail.
October 30, 2025 at 7:39 AM
cm-saf.eumetsat.int
🌍 The EUMETSAT Climate Symposium 2025 starts today in Darmstadt!
Meet CM SAF experts at the Fair of Opportunities and explore how satellite-based climate data support energy, water, and climate services.
A picture of the topical island on solar energy at the Fair of Opportunities. The main stage of the Climate Symposium
October 28, 2025 at 10:18 AM
cm-saf.eumetsat.int
🌍 Do low clouds accelerate global warming?
New research using CM SAF satellite data shows: ocean warming reduces stratocumulus cloud cover − less reflection, more heat.
A feedback loop that could intensify climate change.
🔗 [http://bit.ly/4oe0LEf](bit.ly/4oe0LEf)
Response of reflected solar radiation to changes in sea surface temperature, based on observations during the period 1982-2018.The areas marked by squares are dominated by low-level marine stratocumulus clouds (Source: CM SAF)
October 10, 2025 at 12:07 PM
cm-saf.eumetsat.int
Last day of the EUMETSAT Conference in Lyon! Thanks to everyone who joined the discussions and visited CM SAF contributions. One final talk today: looking at long-term climate data to support the energy transition in Germany. #EMSC2025
DWD-colleague F. Kaspar presents our CM SAF SARAH Climate Data Record at the EUMETSAT conference 2025 in Lyon. Photo taken by H. Weber.
September 19, 2025 at 7:17 AM
cm-saf.eumetsat.int
📌 Poster 450 – Tue & Thu
User scenarios for meteorological missions 2040+
DWD perspective on evolving needs, services & infrastructure – feeding into future EUMETSAT planning.
#EMSC2025
Picture of the poster: "User scenarios for meteorological missions 2040+".
September 16, 2025 at 9:11 AM
cm-saf.eumetsat.int
📌 Poster 314 – Tue & Thu
Towards global albedo data from VIIRS + AVHRR
CLARA extension using simulated VIIRS observations to ensure CDR continuity.
Important step for future CM SAF surface data records.
#EMSC2025
Picture of the poster "Towards global albedo data from VIIRS + AVHRR".
September 16, 2025 at 7:42 AM
cm-saf.eumetsat.int
📍 This week we’re at the #EMSC2025 in Lyon!
CM SAF contributes to several posters and talks on:
☁️ cloud detection
🌞 solar radiation
🌍 albedo
🌀 3D cloud effects
⚡ energy trends
Looking forward to a week full of exchange and ideas!
Statue at the entrance of the EUMETSAT conference in Lyon. Photo taken by DWD colleague.
September 16, 2025 at 7:36 AM
cm-saf.eumetsat.int
👋 Wrapping up #EMS25 in Ljubljana!
CM SAF satellite data featured in inspiring talks & posters - from solar radiation to energy analysis.
And we're not done yet: three more CM SAF-related talks still to come today!
Thanks to all who joined. Safe travels! 🌍
Entrance photo: The entrance of the EMS2025 conference venue in Ljubljana, with signage and attendees entering the building. Photo from the CM SAF team at EMS25 Poster area photo: View of the poster exhibition hall at EMS2025 with participants engaging and walking between poster boards. Photo from the CM SAF team at EMS25.
September 12, 2025 at 6:53 AM
cm-saf.eumetsat.int
📢 Big news from Offenbach!
Since 4 July 2025, the DWD CM SAF team works from the new DWD-Campus. The modern, CO₂-neutral building offers us a new base to continue generating high-quality satellite-based climate data for users worldwide.
Exterior view of the building that houses the new DWD-campus in Offenbach. Interior views of the DWD-campus.
August 29, 2025 at 9:22 AM
cm-saf.eumetsat.int
🚀 Our new paper is published in Earth System Science Data.

Introducing GIRAFE v1 – a global satellite-based climate data record for precipitation (2002–2022) with daily sampling uncertainty.

Find the full paper at:
🔗 doi.org/10.5194/essd...
Global map of accumulated GIRAFE precipitation from 13th July 2021, including CM SAF and GIRAFE logo.
August 27, 2025 at 12:17 PM
cm-saf.eumetsat.int
We’d love to hear from you! Is there still demand for tools like the CM SAF R Toolbox? Would you find it valuable if we continue developing it further? We know a web-based version would be great, but the resources required for this are substantial. Let us know your thoughts!
Screenshot of the R Toolbox visualization tab. It shows a map of the Land Surface Temperature.
July 18, 2025 at 9:13 AM
cm-saf.eumetsat.int
🎉 Celebrating 10 years of the CM SAF R Toolbox! Launched in summer 2015, it has been downloaded over 80,700 times. A big thank you to all users for your continued support and feedback! Here's to more years of data analysis and climate insights.
👉 www.cmsaf.eu/R_toolbox
Infographic on the main features of the CM SAF R Toolbox: Prepare, Analyze and Visualize.
July 18, 2025 at 9:11 AM
cm-saf.eumetsat.int
🌧️ Today at #LPS25:
We present GIRAFE v1 – a new global satellite-based precipitation climate data record with daily uncertainty estimates.
🕓 16:15 | Session A.07.08
📍 Room 1.15/1.16
Join us to learn more about the GIRAFE algorithm & validation!
Global map of GIRAFE v1 daily accumulated precipitation on 2021/07/13
June 24, 2025 at 4:45 AM
cm-saf.eumetsat.int
Today at #LPS25:
Helga presents a multi-model ensemble approach to support Germany’s energy transition.
Satellite-derived solar radiation data from CM SAF’s SARAH-3 is combined with reanalysis wind data to assess energy potential under extreme weather.
#MEDAILLON
Helga is presenting SARAH-3 data, which are used within the Medaillon project.
June 23, 2025 at 7:42 PM
cm-saf.eumetsat.int
Today marks the start of the ESA Living Planet Symposium 2025 in Vienna - the world’s largest Earth observation conference! 🌍
CM SAF experts and users are here to present satellite-based climate data and applications.
📍Find us in Vienna! #LPS25
Picture of the LPS main hall.
June 23, 2025 at 7:33 PM
cm-saf.eumetsat.int
Today is #ShowYourStripes day!
We’re joining in with two examples from CM SAF satellite data:
☁️ Cloud fraction over Spain
☀️ Sunshine duration over South Africa
Each stripe shows the anomaly of a year since 1983 – a visual reminder of our changing climate.
👉 www.cmsaf.eu
Circular stripe plot showing annual climate anomalies from 1983 to 2024. The plot shows cloud fraction over Spain. The colors range from red (more clouds) to blue (fewer clouds), indicating a decreasing trend in cloud cover. Circular stripe plot showing annual climate anomalies from 1983 to 2024.The plot shows sunshine duration over South Africa. Each stripe represents one year. The colors range from grey (less sunshine) to yellow (more sunshine), showing a general increase over time.
June 21, 2025 at 6:09 AM
cm-saf.eumetsat.int
This week we are joining the workshop on “global precipitation monitoring in a joint European effort” hosted by Institut Pierre Simon Laplace @ipsl.bsky.social in Paris and look forward to discussing requirements, production and use cases of precipitation datasets for climate analysis and services.
Group photo of the participants of the workshop on “global precipitation monitoring in a joint European effort”.
May 15, 2025 at 9:33 AM
cm-saf.eumetsat.int
🌞 Just released: HANNA – high-res solar radiation data for Europe!
15-min resolution, \~1 km grid, derived from Meteosat rapid scans with terrain-aware processing.
Perfect for PV modeling, now available for 2019–2020
via CM SAF.

More: contact.cmsaf@dwd.de
High resolution solar radiation HANNA data over the Alps. The average of the surface solar incoming radiation over the years 2019 to 20020 shows small scale variations due to clouds, snow cover, altitude and terrain shadow.
May 14, 2025 at 3:00 PM
cm-saf.eumetsat.int
🌞 Sneak peek: CM SAF's upcoming demonstrational anomaly service!
Shown: SDU anomaly for April 2025 — strong positive values over the UK & Central Europe.
Got thoughts or feedback? We'd love to hear from you!
#Sunshine #ClimateData #SatelliteObservations
Anomaly of CM SAF SARAH sunshine duration (SDU) for April 2025 in reference to 1991-2020. There are strong positive values over the UK and Central Europe.
May 5, 2025 at 11:38 AM
cm-saf.eumetsat.int
📢 CM SAF is now on Bluesky! ☁️
We provide satellite-based climate data on key parameters of the Earth’s energy and water cycle – including:
☀️ radiation (surface & TOA), sunshine duration
☁️ cloud fraction
🌧️ precipitation, water vapour
🌎 surface albedo and more.

🔗 Explore our data: cm-saf.eumetsat.int
Example CM SAF product: Sunshine duration for March 2025 from the SARAH-3 Climate Data Record. It shows the distribution of accumulated sunshine for this month. Example CM SAF product: Surface Downwelling Short-wave Radiation (SIS) for March 2025 from the CLARA-A3 Climate Data Record. It shows the global distribution of SIS. Example CM SAF product: Cloud Fraction for March 2025 from the CLAAS-3 Climate Data Record. It shows the distribution of clouds within the region covered by the Metosat SEVIRI instrument. Example CM SAF product: Surface albedo in March 2025 by the CLARA-A3 Climate Data Record. It shows the global distribution of surface albedo.
April 25, 2025 at 8:59 AM