河西走廊太阳辐射时空分布特征及太阳能资源评估研究

利用河西走廊3个太阳辐射站和19个气象站数据资料，推算了河西走廊各站太阳总辐射量，分析了该地区太阳总辐射空间分布和时间变化特征，并采用相关系数法分析了太阳总辐射的气候影响因素。结果表明：（1）太阳总辐射空间分布在年及春、夏、秋季时间尺度上总体呈西北向东南递减，冬季则正好相反，由西北向东南增加。（2）太阳总辐射在月际和季节分布上呈单峰型，5月最强，12月最弱，夏季最强,冬季最弱。（3）年太阳总辐射呈增加趋势，其线型倾向率为6.3　MJ/(m2·10a)，其中夏、秋、冬季总辐射呈减少趋势，下降最明显的是夏季，春季呈明显的增加趋势。（4）年、季总辐射都表现出2～3、5～6　a短周期及8～10　a长周期震荡。（5）太阳总辐射量与相对湿度、降水量、总云量、低云量及浮尘、扬沙、沙尘暴日数总体都呈负相关，与气温和日照时数呈正相关。（6）河西走廊太阳能资源丰富程度和稳定度表现一致，都呈现为由西北向东南递减的趋势，资源相对丰富的地区稳定度也相对较高。

Research on Spatial and Temporal Distribution Characteristics of Solar Radiation and Assessment ofSolar Energy Resources in Hexi Corridor

Based on the data of 3 solar radiation stations and 19 meteorological stations in the Hexi Corridor, the total solar radiation of each station is calculated, the spatial distribution and temporal variation characteristics of the total solar radiation in the region are analyzed, and the climate influencing factors of the total solar radiation are analyzed by correlation coefficient method. The results show that: (1) the spatial distribution of total solar radiation decreases from northwest to southeast on the annual, spring, summer and autumn time scales, but increases from northwest to southeast in winter. (2) The solar radiation is unimodal in intermonthly and seasonal distribution, with the strongest in May, the weakest in December, the strongest in summer and the weakest in winter. (3) The solar radiation has an increasing trend during the research period, and the linear trend rate is 6.3MJ/(m2·10a). The solar radiation also shows a decreasing trend in summer, autumn and winter, the most obvious decreasing trend was in summer. whie in spring, it shows an obvious increasing trend. (4) The annual and seasonal solar radiation showed a short-term oscillation period of 2 to 3, 5 to 6 years and a long-term oscillation period of 8 to 10 years. (5) The solar radiation is negatively correlated with relative humidity, precipitation, total cloud cover, low cloud cover and the number of dust, sand and sandstorm days, but positively correlated with temperature and sunshine duration. (6) The abundance and stability of solar energy resources show the same trend of decreasing from northwest to southeast. In addition, higher temporal stability in the gross solar radiation frequently took place over the regions with greater gross solar radiation.