Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/52616
Title: Characterization of the intraday variability regime of solar irradiation of climatically distinct locations
Authors: Lauret, Philippe
Perez, Richard
Mazorra Aguiar, Luis 
Tapachès, Emeric
Diagne, Hadja Maimouna
David, Mathieu
UNESCO Clasification: 3308 Ingeniería y tecnología del medio ambiente
Keywords: Model
NWP model
Solar irradiation
Solar resource
Variability
Issue Date: 2016
Journal: Solar Energy 
Abstract: This paper investigates the relationship between two parameters characterizing a given location on a given day: the daily clear sky index KT* and the intraday variability given by the standard deviation of the changes in the hourly clear sky index σ(δktδt*). Empirical evidence assembled from twenty climatically distinct locations led us to derive a simple model to infer intraday variability from the day's clear sky index. Although the model shows little dependence on location, we did observe a systematic difference traceable to a location's prevailing cloud formation regime. Therefore, we also propose two alternative models for sites where cloud formations is influenced by local orography and sites where cloud formation is traceable to weather events only. Finally, we present a possible application of the models to enhance the informative content of day(s) ahead NWP forecasts.
URI: http://hdl.handle.net/10553/52616
ISSN: 0038-092X
DOI: 10.1016/j.solener.2015.11.032
Source: Solar Energy[ISSN 0038-092X],v. 125, p. 99-110
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