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Estimating daily global solar radiation during the growing season in Northeast China using the ?ngstr?m–Prescott model |
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| Authors: | Zhengfang Wu Haibo Du Dongsheng Zhao Ming Li Xiangjun Meng Shengwei Zong |
| Institution: | 1. College of Urban and Environmental Sciences, Northeast Normal University, Changchun, 130024, China 2. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Science, Beijing, 100101, China 3. Tourism Management, Jilin University of Finance and Economics, Changchun, 130024, China |
| Abstract: | Daily global solar radiation is an important input required in most crop models. In the present study, a sunshine-based model, the ?ngstr?m–Prescott model, is employed to estimate daily global solar radiation on a horizontal surface during the growing season in Northeast China. Data from six control groups are used. The controls include the entire sequence, precipitation days, and non-precipitation days both during the growing season and year-round. Estimations are validated by comparing the calculated values with the corresponding measured values. The results indicate that estimating daily global solar radiation during the growing season using data only from the growing season is better than using year-round data. Classifying days with respect to precipitation and non-precipitation is also unnecessary. The performance on estimating daily global solar radiation during the growing season using the entire data in growing season performs best. A sunshine-based equation is obtained using our method to estimate growing season daily radiation for all meteorological stations in Northeast China. The approved approach is expected to be beneficial to crop models and other agricultural purposes. |
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