|
|
|
| Screening with estimated models for global solar radiation in humid regions of South China |
| CUI Ningbo1,2, LI Qilin1*, LI Yanling1, WU Zongjun1, FANG Pei1, SONG Pei1, LI Renxiao1 |
| 1. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, Sichuan 610065, China; 2. Sichuan Provincial Key Laboratory of Water-saving Agricultural in Hill Area of South China, Chengdu, Sichuan 610066, China |
|
|
|
|
Abstract In order to select the optimal experience model for simulating the global solar radiation in humid regions of southern China. Southern China is divided into four regions, namely, East, Central, South and Southwest China. The daily data of 36 radiation stations(1994—2016)were selected to eva-luate the simulation accuracy of three models based on temperature(T1, T2 and T3 model), three models based on sunshine duration(N1, N2 and N3 model)and two hybrid models(M1 and M2 model)in four regions of southern China are optimized by the empirical parameters with least square method. The accuracy of each model in four regions is evaluated on the daily, monthly and annual scales. The results showed that at daily, monthly and annual scales, the accuracy of the sunshine duration models was the highest, followed by the hybrid models and the temperature models. The daily ranges of R2 were 0.847—0.898, 0.654—0.904 and 0.435—0.687, respectively. The monthly ranges of R2 were 0.529—0.857, 0.368—0.858 and 0.334—0.766, respectively. The annual ranges of RE were -1.78%—21.86%, -32.88%—24.14% and -37.54%—72.36%, respectively. Among the sunshine duration models, N2 and N3 models had the highest accuracy. Among the hybrid models, M2 model had the highest accuracy. Therefore, the N2 and N3 models have the best simulation effect in the humid areas of south China. These results can provide a theoretical basis for precisely calculating Rs based on limited meteorological data in southern humid region.
|
|
Received: 15 November 2021
|
|
|
|
|
|
|
