摘要
本文分析了十三年的日长变化、大气角动量和太阳黑子相对数资料,研究了这三种资料序列中30-60天波动过程,用统计分析和检验方法证实这种波动过程在时间尺度上具有随机游动的特性。定量分析表明,在此时间尺度上,大气环流中带风的作用对日长变化的贡献约为87％。如果太阳活动对地球自转中30-60天波动存在激发作用,其作用过程不能完全证明是直接通过大气影响地球自转的。可能存在其他媒介,如通过海洋再作用于大气和固体地球。
The length-of-day variation (ALOD), the atmospheric angular momentum (AAM) and the sunspot relative number (Wolf number) data series spanning 13 years are analyzed to demonstrate the 30-60 day fluctuation in this paper. From statistical analysis and test, it is shown that the fluctuation on this time scale possesses the characteristic of stochastic moving. The zonal winds of the atmospheric circulation dominate 87% LOD variation from quantitative analysis. The solar activity does not affect on the LOD variation of the earth rotation directly from atmosphere and may be through other medium such as the ocean, if the 30-60 day fluctuation is excited by the solar activety.
出处
《中国科学院上海天文台年刊》
1992年第13期13-25,共13页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
基金
国家自然科学基金资助项目
