中文摘要：

现在的学习调查季节的吝啬的表面的 interdecadal 可变性在用从 19612003 的车站观察的西北中国上的太阳的放射。春天和夏天表面在西北中国上的太阳的放射比在通过 mid-1970s，和秋天和冬季表面的 1960 年代太阳的放射显示类似的模式的在通过 1990 年代的 1970 年代末是更低的。这些结果显示在春天和夏天的减少出现太阳的放射可以在西北中国上与增加的低云的盖子被联系。降雨异例是仔细与在西北中国上并且与在春天，夏天，和冬季的北半球 circumglobal teleconnection 的低云的盖子有关。

英文摘要：

The present study investigates the interdecadal variability of seasonal mean surface solar radiation over Northwest China using station observations from 1961-2003. Spring and summer surface solar radiation over Northwest China was lower in the late 1970s through 1990s than in the 1960s through the mid-1970s, and fall and winter surface solar radiation displayed similar pat- terns. These results indicate that the decrease in spring and summer surface solar radiation may be associated with increased low-cloud cover over Northwest China. Rainfall anomalies were closely related to the low-cloud cover over Northwest China and with the Northern Hemisphere circumglobal teleconnection in spring, summer, and winter.