摘要
利用最新的潮汐和地球自转变化在 M2 、Mf、Mm 、Chandler 摆动和18 .6 年频率上的实测值与两种滞弹模型预测的理论值的比较,分析地幔滞弹性在不同频率上的响应,空间测地结果被用来约束理论的滞弹模型.结果表明,Zschau 的理论模型可以解释从地震频段至18 .6 年频率的滞弹勒夫数的观测振幅.本文还依据滞弹模型和Topex/Poseidon 卫星测高资料确定的海潮模型,给出顾及地幔滞弹性和非平衡海潮效应的 Mf 和Mm 频率的潮汐响应理论值.
The authors compare the theoretical values predicted by two anelastic models with the recently observed ones of tides and the Earth rotation variations at M 2, M f, M m, Chandler wobble and 18.6 year frequencies. The response of mantle anelasticity at different frequencies is analyzed, and the observed results of space geodesy are used to constrain the theoretical models of anelasticity. The results show that Zschau's model can interpret the observed amplitude of anelastic Love number in the regime from the seismic frequency to the 18.6 year frequency. Based on anelastic model and ocean tide model determined by Topex/Poseidon satellite altimetry data, the authors also present the theoretical values of the tidal response at M f and M m frequencies in consideration of mantle anelasticity and non equilibrium ocean tide effects.
出处
《天文学报》
CSCD
北大核心
2000年第1期58-61,共4页
Acta Astronomica Sinica
基金
国家自然科学基金!(49774229)
国家"攀登"计划资助
关键词
地球自转
潮汐
地幔滞弹性
Earth rotation, tide, mantle anelasticity
