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| Titel |
Improving HelioClim-3 estimates of surface solar irradiance using the McClear clear-sky model and recent advances in atmosphere composition |
| VerfasserIn |
Z. Qu, B. Gschwind, M. Lefèvre, L. Wald |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 11 ; Nr. 7, no. 11 (2014-11-25), S.3927-3933 |
| Datensatznummer |
250115962
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| Publikation (Nr.) |
 copernicus.org/amt-7-3927-2014.pdf |
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| Zusammenfassung |
| The HelioClim-3 database (HC3v3) provides records of surface solar
irradiation every 15 min, estimated by processing images from the
geostationary meteorological Meteosat satellites using climatological data
sets of the atmospheric Linke turbidity factor. This technical note proposes
a method to improve a posteriori HC3v3 by combining it with data records of
the irradiation under clear skies from the new McClear clear-sky model, whose
inputs are the advanced global aerosol property forecasts and physically
consistent total column content in water vapour and ozone produced by the
MACC (Monitoring Atmosphere Composition and Climate) projects. The method is
validated by comparison with a series of ground measurements for 15 min and
1 h for 6 stations and for daily irradiation for 23 stations. The
correlation coefficient is large, greater than respectively 0.92, 0.94, and
0.97, for 15 min, 1 h and daily irradiation. The bias ranges from −4 to
4% of the mean observed irradiation for most sites. The relative root mean
square difference (RMSD) varies between 14 and 38% for 15 min, 12 and
33% for 1 h irradiation, and 6 and 20% for daily irradiation. As a
rule of thumb, the farther from the nadir of the Meteosat satellite located
at latitude 0° and longitude 0°, and the greater the
occurrence of fragmented cloud cover, the greater the relative RMSD. The
method improves HC3v3 in most cases, and with no degradation in the others. A
systematic correction of HC3v3 with McClear is recommended. |
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