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| Titel |
Scaling and non-scaling methods for the downscaling and disaggregation of temporal rainfall |
| VerfasserIn |
Martino Boni, Stefano Zanetti, Marco Marani |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250033920
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| Zusammenfassung |
| Theoretical and observational descriptions of the temporal structure of rainfall as a function of the aggregation scale
are important both conceptually and operationally. For example, disaggregation and downscaling methods, which preserve large scale means exactly and in the ensemble
mean respectively, require a detailed knowledge of how rainfall statistics change with the temporal scale.
Non-scaling scale relations, which imply a non-power-law
form of the second order moment, are reviewed and are applied to a wide data set representative of different rainfall regimes. Scaling approaches to downscaling and disaggregation are also explored, based on canonical and microcanonical cascades. Additionally, a 'hybrid' method, which uses a non-scaling method to estimate the second order moment at small scales to be imposed in the calibration of a cascade model, is also developed and implemented.
The scaling, non-scaling, and hybrid methods for disaggregation/downscaling are comparatively considered and applied to determine their relative merits and performance. |
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