温度变化对中国大陆三维周年位移的影响

发布时间：2018-02-16 01:51

本文关键词： 陆态网络周年形变温度变化热弹性形变　出处：《测绘学报》2017年09期 　论文类型：期刊论文

【摘要】：除了地表质量重新分布外,地表温度变化是影响地表周年变化的另一重要成因。本文利用全球温度变化数据,基于三维全空间热弹性形变模型,计算温度变化在中国大陆引起的地表热弹性形变,并讨论它对中国大陆三维周年位移的影响。结果表明,温度变化引起的地表周年变化振幅在毫米量级。中国大陆构造环境监测网络(简称:陆态网络)GPS台站受地表温度变化影响最大的台站是HLAR(海拉尔),东向、北向以及垂向的周年振幅矢量和为~2.293mm;影响最小的台站是HIYS(永暑礁),东向、北向以及垂向的周年振幅矢量和为~0.177mm。为了说明温度变化对地表周年形变的影响,本文联合GRACE以及物质负荷模型(MODEL)研究中国大陆地表三维周年位移。考虑温度变化后的MODEL、GRACE获取的地表周年形变在东向、北向、垂向的周年信号分别改进了6%、6%、2%;16%、5%、15%。结果表明,温度变化是物质负荷以外引起大陆地表形变的重要因素。
[Abstract]:In addition to the surface mass redistribution, the surface temperature variation is another important cause that affects the surface annual variation. In this paper, the global temperature change data are used based on the three-dimensional full-space thermoelastic deformation model. The surface thermoelastic deformation caused by temperature variation in the Chinese mainland is calculated, and its effect on the 3D annual displacement of the Chinese continent is discussed. The amplitude of annual surface variation caused by temperature change is in millimeter order. The sum of the annual amplitude vector in the north and vertical direction is 2.293mm; the station with the least influence is HIYS (fiery reef, eastward, northerly and vertical annual amplitude vector sum = 0.177mm. in order to illustrate the effect of temperature change on the annual deformation of the earth's surface, In this paper, combined with GRACE and mass load model (MODEL), we study the 3D annual displacement of the surface of the Chinese mainland. The annual deformation of the surface obtained by model Grace after taking into account the temperature change has been improved in the east, north and vertical directions, respectively. The results show that, Temperature change is an important factor that causes the surface deformation of the continent outside the material load.
【作者单位】：中国科学院上海天文台;中国科学院大学;华东师范大学空间信息与定位导航上海高校工程研究中心;
【基金】：中国大陆构造环境监测网络国家自然科学基金(11373017;11673049;11673050;11273046) 上海市科学技术委员会科研计划(15511101602) 中科院百人计划国家高863计划(2014AA123102) 大地测量与地球动力学国家重点实验室开放基金(SKLGED2016-5-1-EZ)~~
【分类号】：P228.4

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