Summary
A procedure for stochastic simulation of the spatial structure of daily mesoscale temperature and precipitation values is presented. Specific values are generated on the basis of, and consistent with, observational data representing averages over areas corresponding to Atmospheric General Circulation Model grid elements. The procedure is based on a rotated principal component representation of the correlation structure of the observed local data, and procedures synthetic data which statistically resemble the corresponding observations. Use of a stochastic, rather than a deterministic, specification procedure may not be required if generation of only temperature data are of interest.
Zusammenfassung
Es wird eine Methode für die stochastische Simulation der räumlichen Struktur von täglichen mesoskaligen Temperatur-und Niederschlagswerten vorgestellt. Auf der Basis von und konsistent mit Beobachtungsdaten werden spezifische Werte erzeugt. Diese Werte repräsentieren Mittelwerte über Flächen, die den GCM Gitterelementen entsprechen. Die Methode basiert auf der Darstellung der Korrelationsstruktur der lokalen Beobachtungsdaten durch rotierte Hauptkomponenten und produziert synthetische Daten mit statischen Eigenschaften, die denen der Beobachtungen ähnlich sind. Die Verwendung einer stochastischen statt deterministischen Spezifikationsmethode ist wahrscheinlich nicht notwending, wenn das Interesse nur der Erzeugung von Temperaturdaten gilt.
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Wilks, D.S. Statistical specification of local surface weather elements from large-scale information. Theor Appl Climatol 40, 119–134 (1989). https://doi.org/10.1007/BF00866175
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DOI: https://doi.org/10.1007/BF00866175