|We are pleased to announce the release of the CM SAF Land Surface Temperature Data Record SUMET:|
SUMET provides satellite-based information of the temperatures of the top
millimeter (or “skin”) of the land surface under clear sky conditions. SUMET
is the first satellite-based LST climate data record which resolves the full
diurnal LST cycle. It covers Africa and parts of Europe and South America
back to 1991.
Based on inter-calibrated thermal radiances from Meteosat First and Second
Generation satellites, the data record has an excellent decadal stability. It is
therefore of particular interest to study climate variability of LST.
Complementary to near surface air temperatures, it can also be used to
augment station data in regions with a low station density.
The data record includes two different LST products: the Statistical Land
Surface Temperature product is characterized by the highest possible
consistency with the operational LST data from the Land Surface Analysis
Satellite Applications Facility (LSA SAF), while the Physical LST product
ensures the highest possible precision through the implicit use of radiative
SUMET land surface temperatures are presented as hourly data and as
monthly averaged diurnal cycle composites on a 0.05° x 0.05° latitude
and longitude grid. The data record is available free of charge via the
CM SAF Web User Interface and is provided in a user friendly NetCDF
This figure shows the long-term |
average (1991- 2015) of the Meteosat
SUMET clear sky land surface temperature.
|Along with the data, a comprehensive documentation including user guide, algorithm descriptions and extensive validation |
studies, is given.
|We are pleased to announce the release of the new CM SAF cloud fraction climate data record COMET:|
COMET is a homogeneous satellite-based cloud fraction climate data record
covering Europe, Africa, parts of South America as well as the surrounding
ocean areas back to 1991.
Based on inter-calibrated radiances from Meteosat First and Second
Generation satellites, the data record has an excellent decadal stability of
less than 1%. It is therefore of particular interest to study climate variability
of cloud cover. COMET is a characterized by comparability to SYNOP-based
long-term cloud fraction observations carried out at WMO ground stations
and can be used to supplement ground-based cloud fraction estimates in
areas with low station density or high spatio-temporal cloud variability.
COMET cloud fractions are provided as hourly, daily and monthly
composites with a 0.05° to 0.05° spatial resolution from 1991 to 2015. The
data record is available free of charge via the
CM SAF Web User Interface and is provided in a user friendly NetCDF
Along with the data, a comprehensive documentation including user guide,
algorithm descriptions and extensive validation studies, is given.
This figure shows the long-term|
average (1991-2015) of the Meteosat
COMET cloud fraction climate
|NS / Sept2017|
|Updated CM SAF Surface Solar Radiation Climate Data Record available|
The CM SAF is happy to announce the release of the second edition of the
SARAH-2 provides high-quality satellite-based information on surface solar
Six surface solar radiation parameters are provided as part of SARAH-2:
All data records are available as monthly mean products (monthly sum in the case of SDU) and all except the SRI data record
JT / June2017
The CLARA-A2 (CM SAF cLoud, Albedo and surface RAdiation dataset from AVHRR data - Edition 2) record provides cloud
Source: CM SAF
Cloud properties - Product User Manual (PUM)
MSt / March2017
Source: CM SAF
CM SAF has now released the 3rd
It is our pleasure to announce the release of a new CM SAF data record of Top of Atmosphere (TOA) radiation based on the
Figure 1 and Figure 2, respectively, show the longterm average (1983-2015) of the ToA Reflected Solar (TRS) and Emitted
More information on the data record is available from the
“At the end of the 86th EUMETSAT Council session early
New Partner of the CM SAF for CDOP-3 is France
The CLAAS-2 record provides cloud properties derived from the SEVIRI sensor onboard METEOSAT second generation (MSG)|
satellites. This second edition is the improved and extended follow-up of the first version of the record (Stengel et al., 2014). In
order to ensure a homogeneous data basis, the solar SEVIRI channels of MSG-1, MSG-2 and MSG-3 were intercalibrated
(Meirink et al, 2013) with MODIS Aqua before applying the cloud retrievals. CLAAS-2 features 12 years (2004-2015) of cloud
mask/type, cloud top temperature/pressure/height, cloud phase as well as cloud microphysical properties such as optical
thickness, effective droplet radius and cloud water path. The data are available on native SEVIRI resolution, i.e. 15 minutes
repeat cycle and 3km (nadir) to 11km (edge of the field of view) spatial resolution. In addition, spatio-temporal averages of the
above mentioned cloud properties are included: Daily and monthly averages and monthly histograms on a 0.05°x 0.05° grid as
well as monthly mean diurnal cycles on a 0.25°x 0.25° grid. The advancements compared to CLAAS-1 can be summarized
In contrast to ed. 1, CLAAS-2 does not contain radiation products anymore. Along with the data, a comprehensive
At its 85th meeting the EUMETSAT Council approved the 3rd Continuous Development and
In the years 2017 to 2022 CM SAF will continue to develop and deliver improved Climate
Furthermore, CM SAF will continue to provide an exhaustive user service: Summary
For some of the Thematic Climate Data Records (TCDR) CM SAF will also provide regular updates every 5 days
(Interim Climate Data Records). Among the above listed products, the following products are new in CDOP-3:
MW June 2016
We are happy to announce the availability of a new data set called 'SARAH-E' (Surface Solar Radiation Data Set – Heliosat,
SARAH-E is based on the METEOSAT Indian Ocean Data Coverage Imagery data and is available from 1999 to 2015,
SARAH-E DOI: http://dx.doi.org/10.5676/DWD/JECD/SARAH_E/V001UP / June2016
The CM SAF extended its climatology of sunny days to the global scale. Basis are the CM SAF datasets SARAH and CLARA,
The analysis of the so-called “sunny days” was started in cooperation with the Goethe University Frankfurt. A “sunny day” is
The results of this analysis are display via an interactive map on the CM SAF webpage
Thursday, 21 April 2016
Monthly means of Fractional Cloud Cover
Monthly means of Surface Incoming Shortwave Radiation
The product format is netCDF.
More information on the products can be found on Operational Products section of the CM SAF website.
The products are distributed on EUMETCast Europe and EUMETCast Africa:
Users wishing to access these products via their EUMETCast station should register through the
Source: CM SAF
Availability of new CM SAF
The CM SAF Fundamental
Climate Data Record (FCDR)
of SSM/I and SSMIS brightness
temperatures covers the time
period from July 1987 to
December 2013 including all
available data from the six SSM/I
radiometers aboard F08, F10,
F11, F13, F14, and F15 and
from the three SSMIS
radiometers aboard F16, F17,
The SSM/I part remains unchanged compared to the existing CM SAF SSM/I FCDR.
The new FCDR provides homogenised and inter-calibrated brightness temperatures in a user friendly data format. The
KF / June2015
The new CM SAF SARAH data set provides climate-quality data of the surface solar radiation from 1983 to 2013, i.e.,
In cooperation with the University of Frankfurt, Institute for Atmospheric and Environmental Sciences, the
For each city, this analysis indicates certain
JT / Apr2015
|The CM SAF Project Team is happy to announce the release of the new SARAH (Surface Solar Radiation Data Set –|
Heliosat) climate data record of surface solar radiation.
SARAH is based on the observations of the MVIRI and SEVIRI instruments onboard the geostationary Meteosat satellites and provides climatological data of the surface irradiance (SIS), the surface direct normalized irradiance (DNI) and the
effective cloud albedo (CAL). The data are available from 1983 to 2013 as monthly, daily, and hourly averages and cover
the region ±65° longitude and ±65° latitude (see figures) on a 0.05° x 0.05° regular longitude/latitude grid. The accuracy
of the data has been determined against surface reference measurements; for the monthly averages the accuracy is
5.5 W/m2 (SIS) and 17.5 W/m2 (DNI). The temporal stability has been substantially improved compared to the previous
CM SAF surface radiation data set (Posselt et al., 2012). Further information can be found in the documentation of
Figure: (left) Multi-year average and (right) linear decadal trend of the surface solar radiation (SIS) from SARAH.
All products are now available for ordering via CM SAF’s web user interface. For more information contact our
User Help Desk.
Product User Manual (PUM)
Validation Report (VAL)
Algorithm Theoretical Basis Document (ATBD)
Posselt, R., R. W. Müller, R. Stöckli, and J. Trentmann, 2012: Remote sensing of solar surface radiation for climate
monitoring — the CM-SAF retrieval in international comparison. Remote Sensing of Environment, 118, 186-198.
Müller, R., T. Behrendt, A. Hammer, and A. Kemper, 2012: A New Algorithm for the Satellite-Based Retrieval of Solar
Surface Irradiance in Spectral Bands. Remote Sensing, 4, 622-647.
Müller, R., U. Pfeifroth, C Träger-Chatterjee, J. Trentmann, R. Cremer: Digging the METEOSAT treasure - 3 decades
of solar surface radiation and effective cloud albedo. manuscript submitted for publication in Remote Sensing, 2015
JT / Feb2015
|The CM SAF Project Team presents the CM SAF SEVIRI cloud mask dataset – 15 minutes resolution, edition 1 based|
on 9 years of SEVIRI measurements (2004 to 2012).
Figure 1. Cloud mask values for 15th of June 2010 at 11:45 UTC for the entire SEVIRI disk (Figure is taken from Stengel
All products are now available for ordering via CM SAF’s web user interface. For more information
For the precursor dataset (including all cloud properties) see:
MSt / Jan2015
|The CM SAF invites applications for the 2015 EUMETSAT / |
CM SAF Training Workshop on “The Use of gridded
Satellite Data for Climate Services in Africa”, which will take
place from 8 to 12 June 2015 at the WMO/CGMS Virtual
Laboratory Centre of Excellence for Training and Education
of the South African Weather Service, Pretoria, South
The key objective of the 2015 CM SAF Training Workshop
is to instruct active and potential users of gridded satellite
data in the use of CM SAF products for climate monitoring
and climate research focusing on applications in Africa. More
information on the workshop can be found on the
online application form. The deadline for application is
Friday, 30 January 2015.
|A new Climate Atlas based on CM SAF data sets is |
available at the EUMETSAT Website http://www.eumetsat.int/website/home/Images/ImageLibrary/DAT_2266050.html.
This atlas, developed by Zanita Avotniece (Latvian
Environment, Geology and Meteorology Centre),
provides satellite-based climate information on a
variety of parameters for Europe and Lativa. It is
also a guide for working with satellite data in
climatology and provides detailed instructions to
enable users to create their own atlas.
Regional Climate Centres (RCC) are Centres of Excellence that assist WMO
In March 2014 about 100 experts from Europe, Africa
and Overseas met in Grainau to discuss the product
and service portfolio of the Satellite Application
Facility on Climate Monitoring (CM SAF).
The presented talks are available now (klick here)