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Conference papers

On the 21-years HelioClim-1 database of daily values in solar radiation for Europe and Africa

Abstract : Images from the Meteosat satellites offer a synoptic view of the clouds over Europe and Africa and can be used to assess the surface solar irradiance (SSI). The HelioClim-1 database, abbreviated in HC-1, contains daily means of SSI for the period 1985-2005. It has been created from archives of images of the series of geostationary Meteosat First Generation satellites. The agreement of HC-1 with the corresponding measurements made at ground in the World Meteorological Organization network has been reported by several studies and is good as a whole. HC-1 can be used to provide a first description of the change in SSI over the 21 year period, thus palliating gaps in ground-based measurements. If an accurate sort of calibration function can be found between existing HC-1 values and measurements, then HC-1 values can be transformed into an accurate and complete time-series reproducing the measurements. The HC-1 database may help in qualifying ground-based measurements by showing noticeable drifts in measurement quality. The HC-1 data can be retrieved by users from the SoDa Service (, freely without registration. The Global Earth Observation System of Systems (GEOSS) has created the GEOSS Data Collection of Open Resources for Everyone (GEOSS Data-CORE) which is a distributed pool of documented data sets with full, open and unrestricted access at no more than the cost of reproduction and distribution. HC-1 has been identified as a Data-CORE by the GEOSS in November 2011. HC-1 supports research and business by providing data of known quality on surface solar irradiance. Several examples of use of HC-1 were found in scientific journals in various domains: agriculture, air quality, architecture, climate, electricity production, forestry, human health, oceanography and solar energy. Approximately 100000 requests to HC-1 were made by users in 2012. This number demonstrates the usefulness of HC-1.
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Contributor : Lucien Wald Connect in order to contact the contributor
Submitted on : Monday, September 16, 2013 - 9:08:44 AM
Last modification on : Wednesday, November 17, 2021 - 12:32:15 PM


  • HAL Id : hal-00862084, version 1



Bella Espinar, Lucien Wald. On the 21-years HelioClim-1 database of daily values in solar radiation for Europe and Africa. 13th EMS Annual Meeting, Sep 2013, Reading, United Kingdom. ⟨hal-00862084⟩



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