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| Titel |
Inconsistency in Chinese solar radiation data caused by instrument replacement: Quantification based on pan evaporation observations |
| VerfasserIn |
Hanbo Yang, Zhe Li, Mingliang Li, Dawen Yang |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250105005
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| Publikation (Nr.) |
 EGU/EGU2015-4448.pdf |
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| Zusammenfassung |
| Solar radiation determines our climate and hydrological cycle, and it has been widely measured by pyrometers at meteorological stations. In the early 1990s, a large-scale instrument replacement occurred across China, leading to inconsistent solar radiation observations. Fortunately, China has consistent pan evaporation (Epan) observations from Chinese micro-pans (with a diameter of 20 cm) from the 1950s to 2001. This study parameterized the PenPan-20 model for estimating Epan from these pans using a Bayesian approach. Furthermore, based on the PenPan-20 model, a shift in the solar radiation data (~1.4±0.5 MJ/(d m2) or 16±7 W/ m2) in the early 1990s was revealed; this change was likely due to the large-scale retrofitting of new instruments and irregular calibration operations. |
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