近30年中国太阳总辐射时空特征及趋势分析

目的]研究近30年我国太阳总辐射时空分布特征及长期变化趋势。方法]利用全国62个站点1986—2015年太阳总辐射实测资料,分析了总辐射时空分布以及变化趋势。结果]我国太阳年总辐射总体呈现出较为明显的波动上升趋势,而季节总辐射上升幅度从大到小依次为春季、夏季、冬季、秋季;太阳总辐射呈现出西北高、东南低,内陆高、沿海低,高原高、平原低,干燥区高、湿润区低的空间分布特征,青藏高原、川黔渝山地分别为我国太阳总辐射高值和低值区;春夏两季太阳总辐射的增加是全年总辐射上升的主要原因;1996—2005年总辐射量的显著增加是导致30年来我国总辐射量增加的重要原因之一。结论]该研究可为我国太阳能资源的有效利用提供重要科学依据。

Temporal and Spatial Characteristics and Trend Analysis of Total Solar Radiation in China in Recent 30 Years

Objective]The research aimed to study the temporal,spatial distribution characteristics and the long-term trend of the total solar radi-ation in China during nearly 30 years. Method] The spatial and temporal distribution of total solar radiation and the trend of change were analyzed by using the total solar radiation data of 62 stations in China from 1986 to 2015.Result]The annual total solar radiation in China showed a obvi-ous trend of rising volatility,but the seasonal increase in total radiation from large to small,followed by spring,summer,winter,autumn;The total solar radiation mainly shows the spatial distribution characteristics of high northwest,low southeast,high inland,low coastal,high plateau,low plain and high dry area and low humid area.From both the annual and the seasonal radiation results,a stable high value was shown in the Tibet Plat-eau,a stable low value was shown in the mountainous area of Sichuan and Chongqing.The increase of total solar radiation in spring and summer was the main reason for the increase of total radiation in the whole year.The significant increase of total radiation in 1996-2005 was one of the important reasons for the increase of total radiation in China in 30 years. Conclusion] The study can provide scientific basis for the effective use of solar energy resource in China.