GRID DIVISION FOR SURFACE SOLAR RADIATION OBSERVATIONS BY CONSIDERING ITS SPATIOTEMPORAL HETEROGENEITY

Zhuang Shuyi; Bu Qiangsheng; Luo Fei; Zhang Tong; Ye Zhigang; Guo Ye

doi:10.19912/j.0254-0096.tynxb.2024-0185

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (6) : 501-509. DOI: 10.19912/j.0254-0096.tynxb.2024-0185

GRID DIVISION FOR SURFACE SOLAR RADIATION OBSERVATIONS BY CONSIDERING ITS SPATIOTEMPORAL HETEROGENEITY

Zhuang Shuyi, Bu Qiangsheng, Luo Fei, Zhang Tong, Ye Zhigang, Guo Ye

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Abstract

This study, taking Jiangsu Province as an example, explores a regional continuous grid division scheme by combining remote sensing-based surface solar radiation data with Gaussian mixture models. The research confirms that the hourly radiation data obtained from remote sensing inversion has high accuracy in Jiangsu Province in comparison to ground observations, with correlation coefficients of 0.95 and 0.89 for the global and diffuse radiation, respectively. In addition, the spatiotemporally continuous estimates accurately reveal the spatial differences and monthly variations in both global and diffuse radiation within the region. Using monthly sequences as the basis for solar radiation zoning, this study checks the changes in information entropy and actual zone number of the zoning result of Gaussian mixture model under different maximum zone number constraints, finding that constructing 100 to 208 continuous zones in Jiangsu Province is appropriate. As the zone number increases, the zoning granularity becomes finer, and the zoning scheme evolves from mainly revealing differences in the amount of surface radiation to concurrently considering differences in both the amount and variations.

Key words

solar radiation / Gaussian distribution / spatio-temporal data / solar energy / geographic zoning / remote sensing applications

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Zhuang Shuyi, Bu Qiangsheng, Luo Fei, Zhang Tong, Ye Zhigang, Guo Ye. GRID DIVISION FOR SURFACE SOLAR RADIATION OBSERVATIONS BY CONSIDERING ITS SPATIOTEMPORAL HETEROGENEITY[J]. Acta Energiae Solaris Sinica. 2025, 46(6): 501-509 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0185

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