陕西省太阳辐射及其日照时数的时空变化特征

根据陕西省气象台站观测资料,分析了陕西省太阳总辐射和日照时数的时空演变特征.结果表明,陕西省太阳总辐射和日照时数呈现出一致性的从北向南递减趋势,且在渭北高原一带存在太阳总辐射和日照时数的次高值区,同时指出了陕北地区4～8月,关中、陕南地区5-8月是太阳能资源利用的最佳时期.研究结果可为进一步研究区域气候变化、指导农业生产及合理利用太阳能资源提供参考依据.

Spatiotemporal Variation of Solar Radiation and Sunshine Hours in Shaanxi Province

The variation characteristics of global solar radiation and sunshine hours in Shaanxi Province are analyzed. Total solar radiation and sunshine hours in Shaanxi Province show a consistently decreasing trend from north to south. The Weibei Plateau area is the second high-value area of global solar radiation and sunshine hours. April to August in North Shaanxi Province and May to August in Guanzhong and South Shaanxi Province are the best period for the use of solar energy resources. Result from the study is useful in understanding regional climate change,guiding agricultural production,and using solar energy resources.