| 表面垂直位移和重力变化引起的大地水准面形变 |
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| 引用本文： | 高锡铭,王威中.表面垂直位移和重力变化引起的大地水准面形变[J].地球物理学报,1989,32(6):686-694. |
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| 作者姓名： | 高锡铭 王威中 |
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| 作者单位： | 国家地震局地震研究所 武汉 |
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| 摘 要： | 在涉及表面垂直位移的地球物理正演和反演问题的研究中,表面真垂直位移等于表面视垂直位移和大地水准面高变化的和.本文从广义Bruns公式、广义stokes公式和广义Ve-ning-Meinesz公式出发,导出了用表面垂直位移和重力变化确定大地水准面形变的公式.讨论了表面垂直位移和重力变化对大地水准面高变化的影响.在此基础上,给出了表面荷载源、几种不同充填介质的膨胀源和位错源所引起的大地水准面高变化对视垂直位移影响的数值结果,分析了局部地球物理事件引起的大地水准面高变化的特点.最后给出了使用辽南地区的实际观测资料确定的局部大地水准面高变化以及对视垂直位移影响的计算结果.
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| 关 键 词： | 表面垂直位移 重力变化 大地水准面形变 |
| 收稿时间： | 1986-12-26 |
GEOIDAL DEFORMATION RESULTING FROM THE SURFACE VERTICAL DISPLACEMENTS AND GRAVITY CHANGES |
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| GAO XI-MING WANG WE-ZHONG ZHONG XIAO-XIONG YEN ZHI-SHAN.GEOIDAL DEFORMATION RESULTING FROM THE SURFACE VERTICAL DISPLACEMENTS AND GRAVITY CHANGES[J].Chinese Journal of Geophysics,1989,32(6):686-694. |
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| Authors: | GAO XI-MING WANG WE-ZHONG ZHONG XIAO-XIONG YEN ZHI-SHAN |
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| Institution: | Institute of Scismology, State Seismological Bureau, Wuhan |
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| Abstract: | In the studies of geophysical normal problem and inverse problem concerning the surface vertical displacements, the real surface vertical equals the sum of apparent vertical displacement and geoidal height variation. In this paper, formulae determining the geoidal deformations by means of the data of surface vertical displacements and gravity changes have been derived starting out with generalized Brims, Stokes and Vening. Meinesz formulae. The effects of surface vertical displacements and gravity changes upon the geoidal height variation have been also discussed. Based on these, the results represented the effect of the geoidal height variation due to surface loading source and several dilatancy-diffusion sources filled by different material medium as well as dislocation source upon apparent vertical displacements have been presented quantitatively. Characteristices of the geoidal height variation due to local geophysical event have been analysised. Finally, computed results of the geoidal height variation and its effect on the apparent vertical displacement determined by the data observed by repeated levelling and gravity in the southern of Liaoning provice have been presented as examples. |
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| Keywords: | Surface vertical displacements Gravity changes Geoidal deformation resulting |
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