Intermittency study of global solar radiation under a tropical climate: case study on Reunion Island

Abstract The arbitrary order Hilbert spectral analyses are applied to study the intermittency and multifractality of Global Horizonal Irradiation (GHI) based on one available high sampling rate of 1-year GHI records located at Saint-Denis (Moufia) over Reunion Island. The scaling exponents $$\xi \le...

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Autores principales:	Qi Li, Peng Li
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/15e08f9feed3476b9dcf1e2e69b650ee
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spelling	oai:doaj.org-article:15e08f9feed3476b9dcf1e2e69b650ee2021-12-02T17:52:26ZIntermittency study of global solar radiation under a tropical climate: case study on Reunion Island10.1038/s41598-021-91639-92045-2322https://doaj.org/article/15e08f9feed3476b9dcf1e2e69b650ee2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-91639-9https://doaj.org/toc/2045-2322Abstract The arbitrary order Hilbert spectral analyses are applied to study the intermittency and multifractality of Global Horizonal Irradiation (GHI) based on one available high sampling rate of 1-year GHI records located at Saint-Denis (Moufia) over Reunion Island. The scaling exponents $$\xi \left( q \right)$$ ξ q is estimated through the arbitrary order Hilbert spectral analyses, and three parameters: Hurst exponent (H), the fractal co-dimension (C 1), and Lévy parameter ( $$\alpha$$ α ) are taken to study the multifractal process of the GHI in the sub-daily, daily fluctuations and also in seasonal variations. A power law behaviour with a spectral exponent β = 1.68 close to the Kolmogorov spectrum is detected through Fourier spectrum analysis, which indicates that the sub-daily fluctuations of GHI are nonstationary. The scaling exponent ζ(q) is then estimated by the arbitrary order Hilbert spectral analysis and the multifractal properties is detected. The log-stable model parameters $$H,{ }C_{1}$$ H , C 1 and $$\alpha$$ α characterize the concavity of the scaling exponent ζ(q) for analysing the intermittency of GHI. The classification method is applied to the daily GHI for analysing the distribution of the daily intermittency process and five classes with GHI and K b are obtained.Qi LiPeng LiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Qi Li Peng Li Intermittency study of global solar radiation under a tropical climate: case study on Reunion Island
description	Abstract The arbitrary order Hilbert spectral analyses are applied to study the intermittency and multifractality of Global Horizonal Irradiation (GHI) based on one available high sampling rate of 1-year GHI records located at Saint-Denis (Moufia) over Reunion Island. The scaling exponents $$\xi \left( q \right)$$ ξ q is estimated through the arbitrary order Hilbert spectral analyses, and three parameters: Hurst exponent (H), the fractal co-dimension (C 1), and Lévy parameter ( $$\alpha$$ α ) are taken to study the multifractal process of the GHI in the sub-daily, daily fluctuations and also in seasonal variations. A power law behaviour with a spectral exponent β = 1.68 close to the Kolmogorov spectrum is detected through Fourier spectrum analysis, which indicates that the sub-daily fluctuations of GHI are nonstationary. The scaling exponent ζ(q) is then estimated by the arbitrary order Hilbert spectral analysis and the multifractal properties is detected. The log-stable model parameters $$H,{ }C_{1}$$ H , C 1 and $$\alpha$$ α characterize the concavity of the scaling exponent ζ(q) for analysing the intermittency of GHI. The classification method is applied to the daily GHI for analysing the distribution of the daily intermittency process and five classes with GHI and K b are obtained.
format	article
author	Qi Li Peng Li
author_facet	Qi Li Peng Li
author_sort	Qi Li
title	Intermittency study of global solar radiation under a tropical climate: case study on Reunion Island
title_short	Intermittency study of global solar radiation under a tropical climate: case study on Reunion Island
title_full	Intermittency study of global solar radiation under a tropical climate: case study on Reunion Island
title_fullStr	Intermittency study of global solar radiation under a tropical climate: case study on Reunion Island
title_full_unstemmed	Intermittency study of global solar radiation under a tropical climate: case study on Reunion Island
title_sort	intermittency study of global solar radiation under a tropical climate: case study on reunion island
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/15e08f9feed3476b9dcf1e2e69b650ee
work_keys_str_mv	AT qili intermittencystudyofglobalsolarradiationunderatropicalclimatecasestudyonreunionisland AT pengli intermittencystudyofglobalsolarradiationunderatropicalclimatecasestudyonreunionisland
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Intermittency study of global solar radiation under a tropical climate: case study on Reunion Island

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