青海高原太阳辐射时空分布特征

对西宁莫家泉湾和玉树辐射观测站的资料分别进行了订正和插补，对青海省太阳辐射的空间分布、年际变化进行了系统研究。结果表明：青海省年总辐射量高，总的分布趋势西高东低；20世纪70年代是总辐射高值时期，而80年代处于明显的低值时期，80年代末期至90年代初期有所回升，但90年代中期后处于下降状态。70年代的高值期和80年代低值期的出现与该时段青海省云雨状况和全球重大火山喷发事件密切相关，火山喷发是导致80年代总辐射量减少的重要原因。

Distribution Characteristics of Solar Radiation over Qinghai Plateau

The correction and interpolation were conducted on the radiation observation in Mojiaquanwan and Yushu around Xining, and the spatial distribution and inter-annual variation of solar radiation were analyzed systematically. The results stows that the global radiation is relatively high over the Qinghai Plateau and the distribution shows a tendency of higher in the West is and lower in the East; the global radiation value was higher in the 1970's and obvious low in the 1980's, increased again from the end of the 1980's to the beginning of 1990's, but decreased after the middle 1990's. The high and low periods in the 1970s and 1980s are closely related to the cloud amount and precipitation over Qinghai Province and volcanic eruptions across the world during the same periods. Volcanic eruption was an important cause of the decrease in solar radiation.