Strong short-term non-linearity of solar irradiance fluctuations. (1st March 2017)

• Record Type: Journal Article
• Authors: Madanchi, Ata; Absalan, M.; Lohmann, G.; Anvari, M.; Reza Rahimi Tabar, M.
• Is Part Of: Solar energy. Volume 144(2017)
• Page Start: 1
• Page End: 9
• Publication Date: 2017-03-01
• Subjects: Solar energy -- Intermittency -- Short-time scale nonlinearity; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2017.01.008
• Languages: English
• ISSNs: 0038-092X

Abstract

Highlights: The short-term non-linearity of solar irradiance fluctuations has been studied. We show that time series of solar irradiance have a long range correlation function. The fluctuations have multifractal behaviour. Abstract: We investigate short-term non-linearity of solar irradiance fluctuations using the multifractal detrended fluctuation analysis (MFDFA). The MFDFA shows that time series of solar irradiance have a long range correlation function with a multifractal behavior. We apply this method to solar irradiance time series from several regions around the world with resolutions of seconds and minutes. The obtained generalized Hurst and Renyi exponents h ( q ) and τ ( q ) suggest the non-linear and non-stationary essence of measured irradiance time series. Also, we analyze shuffled, random phase, and rank-wised surrogated data to reveal the nature of the multifractality and conclude that linear and non-linear correlations are the dominant contributions to observed multifractal and non-linear behavior of solar irradiance.