黄土高原太阳总辐射气候学计算及特征分析

Climatological Calculation and Analysis of Global Solar Radiation in the Loess Plateau

在概述了当前太阳总辐射的气候学计算方法的基础上,利用黄土高原区11个气象站点1992-2000年的日照时数和总辐射数据,采用最小二乘法按月求出黄土高原区气候学计算公式中的系数;然后根据研究区内73个站点的日照时数计算出太阳总辐射量,通过内插得到整个区域各月的太阳总辐射量。结果发现:黄土高原区太阳总辐射有随着纬度增高而增加的特点。

Based on the brief discussion about the current main methods and formulas for climatological calculation of global solar radiation, in this paper the coefficients in the climatological calculation formula for the Loess Plateau are derived with the least-squares procedure using the data of sunshine duration and global solar radiation observed by 11 meteorological stations in the Loess Plateau during the period from 1992 to 2000. The values of global solar radiation at 73 meteorological stations in the Loess Plateau are calculated using the data of sunshine duration at these stations, and the values of monthly global solar radiation are calculated with interpolation. The results show that the global solar radiation in the Loess Plateau is increased with the increase of latitudes, and the high value of solar radiation shifts from the northwest to the northeast during the period from January to May, from the northeast to the northwest during the period from June to December, and the maximum value of solar radiation in the northeast occurs in May. Precipitation in the Loess Plateau occurs mainly in July and August, so the highest and lowest values of solar radiation in the Loess Plateau occur generally in June and November respectively. The study results can be referred in utilizing solar energy and calculating the values of solar radiation in the regions where the data of solar radiation are insufficient in the Loess Plateau.