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Variabilité spatiale et temporelle du rayonnement solaire global sur une topographie à relief marqué et complexe. Cas de l’île de La Réunion

Abstract : In the South-West Indian Ocean, La Réunion Island is located in a strong solar potential. However, its complex topography and tropical climate are obstacles to the best exploitation of renewable energies. Thus, the knowledge of the local solar potential has to be deepen, both on its temporal and spatial variabilities. The research here focuses on this deepening of the local solar deposit. Thus, the use of SARAH-E satellite product (Solar surfAce RAdiation Heliosat - East) allows us to study the irradiance of Reunion Island on 89 pixels and 16 years of hourly data. In a first study, the mean solar potential is mapped by combining its two orbital components: the diurnal and seasonal cycles. Their complementarity permits the extraction of coherent zones with the local atmospheric dynamic. In the second part, the daily perturbations modulating the mean solar potential are detailed in five typical days with specific spatial structures and temporality. We then propose a first link between local solar perturbations and the larger-scale atmospheric processes, namely the Madden-Julian oscillation, the Tropical-Temperate Troughs and Tropical Cyclones. Finally, La Réunion island solar resource is decomposed into (1) an mean cyclic potential, combining seasonal and diurnal evolutions, and (2) typical daily perturbations, with links to larger-scale atmospheric dynamics.
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Pauline Mialhe. Variabilité spatiale et temporelle du rayonnement solaire global sur une topographie à relief marqué et complexe. Cas de l’île de La Réunion. Physique [physics]. Université de la Réunion, 2018. Français. ⟨NNT : 2018LARE0029⟩. ⟨tel-02059865⟩

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