摘要
本文根据1974.0-1980.0年的日长(LOD)资料,太阳黑子相对数(SP)资料,以及计算得到的日心相对于太阳系质心相同时期的轨道角动量变化率序列,对它们作了比较分析。结果表明,在LOD的短周期变化中,近95天和120天项可能来自太阳的周期性活动,而大行星的轨道运动引起日心的周期性轨道角动量变化率或许是太阳活动的一种外部力学因素。
The short periodic fluctuation in both series of the length of day (LOD) and the relative sunspot numbers (SP), with the periodicities of about 95 days and 120 days was found. The same fluctuation was identified in J⊙, the rate of change of the orbital angular momentum of the sun's center in ecliptic barycenter coordinate of the solar system. The existence of these coincident periodic components in three different series suggests that the solar activities are much possibly modulated by the orbital motion of the major planets and the former influence the earth's rotation.
出处
《中国科学院上海天文台年刊》
1992年第13期33-39,共7页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
基金
国家自然科学基金资助项目
