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Qi Q, Wu J, Gueymard CA, Qin W, Wang L, Zhou Z, Niu J, Zhang M. Mapping of 10-km daily diffuse solar radiation across China from reanalysis data and a Machine-Learning method. Sci Data 2024; 11:756. [PMID: 38992050 PMCID: PMC11239849 DOI: 10.1038/s41597-024-03609-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 07/05/2024] [Indexed: 07/13/2024] Open
Abstract
Diffuse solar radiation (DSR) plays a critical role in renewable energy utilization and efficient agricultural production. However, there is a scarcity of high-precision, long-term, and spatially continuous datasets for DSR in the world, and particularly in China. To address this gap, a 41-year (1982-2022) daily diffuse solar radiation dataset (CHDSR) is constructed with a spatial resolution of 10 km, based on a new ensemble model that combines the clear-sky irradiance estimated by the REST2 model and a machine-learning technique using precise cloud information derived from reanalysis data. Validation against ground-based measurements indicates strong performance of the new hybrid model, with a correlation coefficient, root mean square error and mean bias error (MBE) of 0.94, 13.9 W m-2 and -0.49 W m-2, respectively. The CHDSR dataset shows good spatial and temporal continuity over the time horizon from 1982 to 2022, with a multi-year mean value of 74.51 W m-2. This dataset is now freely available on figshare to the potential benefit of any analytical work in solar energy, agriculture, climate change, etc ( https://doi.org/10.6084/m9.figshare.21763223.v3 ).
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Affiliation(s)
- Qinghai Qi
- Hubei Key Laboratory of Regional Ecology and Environment Change, School of Geography and Information Engineering, China University of Geosciences, Wuhan, 430074, China
| | - Jinyang Wu
- Hubei Key Laboratory of Regional Ecology and Environment Change, School of Geography and Information Engineering, China University of Geosciences, Wuhan, 430074, China
| | | | - Wenmin Qin
- Hubei Key Laboratory of Regional Ecology and Environment Change, School of Geography and Information Engineering, China University of Geosciences, Wuhan, 430074, China.
| | - Lunche Wang
- Hubei Key Laboratory of Regional Ecology and Environment Change, School of Geography and Information Engineering, China University of Geosciences, Wuhan, 430074, China
| | - Zhigao Zhou
- School of Low Carbon Economics, Hubei University of Economics, Wuhan, 430074, China
| | - Jiayun Niu
- Hubei Key Laboratory of Regional Ecology and Environment Change, School of Geography and Information Engineering, China University of Geosciences, Wuhan, 430074, China
| | - Ming Zhang
- Hubei Key Laboratory of Regional Ecology and Environment Change, School of Geography and Information Engineering, China University of Geosciences, Wuhan, 430074, China
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