中文摘要：

太阳黑子活动可能对气候的变化起到了诱导和调制作用,文中以陕西省降水量为分析对象研究太阳黑子活动对区域性降水的影响。利用集合经验模态分解方法（EEMD）对1960-2010年陕西省降水量和太阳黑子相对数进行了周期分析。研究结果表明：陕西省降水量存在16.7a、9.8a、4.9a和3.3a的平均周期,主要的平均周期9.8a与同时期的太阳黑子相对数10.3a的平均周期基本一致,在该时间尺度上两者成负相关关系,但降水量有滞后现象。结论说明太阳黑子活动是影响陕西省降水量的重要因子,但陕西省降水量还存在其他周期,说明陕西省降水量除受太阳活动的影响外,还受其他因素的影响。

英文摘要：

The sunspot activity may play a role of induction and modulation on climate change. This research studied the influence of sunspot activity on precipitation in Shaanxi region. The ensemble empirical mode decomposition（ EEMD） was adopted to analyze the periodic characteristics of the precipitation data of Shaanxi Province and the sunspots during 1960 to 2010. The results are as follow： the rainfall of Shaanxi Province had 16. 7-year,9. 8-year,4. 9-year and 3. 3 year cycles; both the rainfall of Shaanxi Province and the sunspots had about 10-year cycle; there are negative correlations between precipitation and sunspots; furthermore,the rainfall lagged behind the sunspots. The conclusions indicate the rainfall of Shaanxi Province was influenced by the sunspot activity,but there were still other factors.