摘要
用交叉谱分析方法研究近地面大气折射指数N单位平均值、月降水总量与太阳黑子相对数之间多频振动特征。结果发现:初夏,N单位与太阳黑子(或降水量)在准5年及准2年(或准7年、准4年及准3年)周期附近有十分密切的关系;初秋,N单位与太阳黑子在准5年、准2年周期附近密切相关;N单位与降水量除在短周期准3年、准2年附近有密切关系外,在长周期准35年附近亦有较密切的关系。
By using the cross spectrum analysis method,studies are made of the multi-frequency oncillation characteristics of the N unit average of the surface atmospheric re-fraction index related to the total monthly rainfall and the relative number of sunspots.It is found that in early summer there exists a very close relation between the N unit andsunspots (or rainfall) around the periods of quasi-five and quasi-two years (or quasi-seven, quasi-four and quasi-three years) and in early autumn a close relation be-tween the N unit and sunspots around the periods of quasi-five and quasi-two years.And the N unit is found to have a close relation with rainfall not only around the shortperiods of quasi-three and quasi-two years but also around the long period of quasi-35 years.
出处
《南京气象学院学报》
CSCD
1992年第4期591-600,共10页
Journal of Nanjing Institute of Meteorology
关键词
大气
折射指数
太阳
黑子
降水
cross spectrun analysis
atmospheric refraction index
sunspot
rainfall
