摘要
近二百年来,国内外天文学家和地球物理学家对地球自转速度变化这一自然现象给予了极大的关注.从地球内部(包括大气层)的不同层次、不同角度探讨这一自然规律的成因.人们最初把它看的非常简单,随着时间的推移,进一步更加仔细的研究和更先进计算手段的运用,该课题则显得更为复杂,更加神秘.造成这种局面的原因是研究方向错了.本文的研究思路与传统的研究思路相反,从地球外部探讨地球自转速度变化的主要原因.研究结果证明:国内外天文学家和地球物理学家从地球内部(包括大气层)所探讨的引起地球自转速度季节性变化的任何因素看来都不是主要的,太阳辐射光压在南、北半球表面上的不平衡分布才是造成地球自转速度季节性变化的主要原因.
In last 200 years, great attentions have been paid to the natural phenomenon of the velocity fluctuation of Earth rotation by the astronomers and geophysicists. Previous studies mainly discussed this phenomenon from the aspect of Earth itself including Earth＇s interior and atmosphere. However, this problem, which was previously regarded as a simple one, gradually become more complex and mysterious due to more detailed probing and the application of more sophisticated calculating approaches. This case is resulted from the wrong orientation of previous researches. In this study we apply a new idea opposite to traditional approaches, i.e. searching for the major courses of the fluctuation of Earth rotation based on the factors outside the Earth. The results show that any factors previously identified from the Earth itself are not significant for the seasonal fluctuation of Earth rotation velocity. And it is conformed that the un-equal distribution of solar light pressure on south and north hemispheres should be the most important factor.
出处
《地球物理学进展》
CSCD
北大核心
2011年第2期450-455,共6页
Progress in Geophysics
基金
中国地震局"老专家科研基金"项目(L09003)资助
关键词
日长(l.o.d)
地球自转
太阳光压
角动量
转动惯量
角速度
length of day, Earth rotation, solar light pressure, angular momentum, rotation inertia, angular velocity
作者简介
宋贯一，男，1940年生，河南巩义人．1964年毕业于中国科学技术大学，研究员，主要从事与天文地球动力学相关的极移的成因、地球自转速度的变化、长期极移的成因、地球基本磁场的成因等日-地间动量（能量）直接相耦合物理机制的研究．（Email：songguanyi6@126．com）
