摘要
本文讨论了地球膨胀过程的初始半径R_0、膨胀起始时间t_0以及半径R、转动惯量I、地表重力加速度g和反映地球内部物质分布状态参数y等膨胀基本参数的平均变化率。研究结果表明,在地球的地质年龄之内,地球膨胀的初始半径R_0>4619km,膨胀的起始时间t_0<43.8×10~2Ma,膨胀过程中的地球半径R、物质分布状态参数y、转动惯量I、地表重力加速度g和表面积S随时间的平均变化率分别为:dR/dt=4×10^(-4)m/a,dy/dt=-6.7×10^(12)/a,dI/dt=8.49×10^(27)kg·m^2/a,dg/dt=-1.23×10^(-10)kg·s^(-2)/a和ds/dt=6.41×10~4m^2/a。地球膨胀过程中的半径平均增长率,是首次用天文学方法研究得出,且该值介于其他作者用古地磁、古地理等方法所求得的地球半径增长率若干数值之间。
Based on the results of research on astronomical observation and paleontology,this paper mainly discussed the initial radius of the expanding earth,the time when the earth began its expansion and the average rates of change of some basic parameters,namely,the radius R,the rotational inertia /,the gravity acceleration g on the earth's surface and the distributive state parametre y of the earth's internal matter.The discussion comes to the conclusion that at the geological history of the earth,the initial radius R0>4619km,the beginning of expanding earth t0<.43.8×102 Ma,the average values of dR/dt,dy/dt,dI/dt,dg/dt and ds/dt are respectivly 4×10-4m/a,-6.7×10-12/a,8.49×1027kg·.m2/a,-1.23×10-10kg·s-2/a and 6.41×104m2/a.For the first time the average rate of change of the radius is obtained by thte writer through analysing astromical data,and it is very close to the average rate of change of the radius obtained by other people through palaeoamagnetism,paleography and other methods.This also tests and verifies the conclusions in writer's another paper 'The measure-die linear rule on distribi-tive state of the earth's matter'.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第5期611-618,共8页
Chinese Journal of Geophysics
关键词
膨胀
地球
参数
初始半径
自转率
The basic parameter of the Earth in expanding
Astronomical method
Theinitial radius of the Earth expansion
The initial time of the expandingEarth
'Size-mass distribution state linear rule' of the terrestrical planets
