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| Titel |
Reconstruction of global solar radiation time series from 1933 to 2013 at the Izaña Atmospheric Observatory |
| VerfasserIn |
R. D. García, E. Cuevas, O. E. García, V. E. Cachorro, P. Pallé, J. J. Bustos, P. M. Romero-Campos, A. M. Frutos |
| 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. 9 ; Nr. 7, no. 9 (2014-09-25), S.3139-3150 |
| Datensatznummer |
250115911
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| Publikation (Nr.) |
 copernicus.org/amt-7-3139-2014.pdf |
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| Zusammenfassung |
| This paper presents the reconstruction of the 80-year time series of daily
global solar radiation (GSR) at the subtropical high-mountain
Izaña Atmospheric Observatory (IZO) located in Tenerife (The Canary
Islands, Spain). For this purpose, we combine GSR estimates from sunshine
duration (SD) data using the Ångström–Prescott method over the
1933/1991 period, and GSR observations directly performed by pyranometers
between 1992 and 2013. Since GSR measurements have been used as a reference,
a strict quality control has been applied based on principles of physical
limits and comparison with LibRadtran model. By comparing with high quality
GSR measurements, the precision and consistency over time of GSR estimations
from SD data have been successfully documented. We obtain an overall root
mean square error (RMSE) of 9.2% and an agreement between the variances
of GSR estimations and GSR measurements within 92%. Nonetheless, this
agreement significantly increases when the GSR estimation is done considering
different daily fractions of clear sky (FCS). In that case, RMSE is reduced
by half, to about 4.5%, when considering percentages of
FCS > 40% (~ 90% of days in the testing period).
Furthermore, we prove that the GSR estimations can monitor the GSR anomalies
in consistency with GSR measurements and, then, can be suitable for
reconstructing solar radiation time series. The reconstructed IZO GSR time
series between 1933 and 2013 confirms change points and periods of
increases/decreases of solar radiation at Earth's surface observed at
a global scale, such as the early brightening, dimming and brightening. This
fact supports the consistency of the IZO GSR time series presented in this
work, which may be a reference for solar radiation studies in the subtropical
North Atlantic region. |
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