A model of present-day tectonic plate motions from 12 years of DORIS measurements
A model of present-day tectonic plate motions from 12 years of DORIS measurements
复制标题
来自 12 年 DORIS 测量的当今板块运动模型
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
J. Crétaux
中科院分区：
文献类型：
--
作者：
L. Soudarin;J. Crétaux
在国际DORIS服务的框架内，地球物理学和海洋学空间研究中心/定位卫星收集分析中心处理SPOT、TOPEX/Poseidon和Envisat卫星的DORIS测量数据，并向国际空间站提供整个网络的每周台站坐标。根据DORIS观测资料，计算了57个DORIS站点的水平和垂直速度。由12年（1993-2004年）的组合法方程矩阵同时估计直线运动台站的三维位置和速度。我们包括35 DORIS网站假定位于9个构造板块的稳定区。对于这些板块的运动，我们提出了一个模型（LCAVEL-1）的角速度在ITRF 2000参考框架。基于外部比较与最新的全球板块模型（PB 2002，REVEL，GSRM-1和APKIM 2000）和内部分析，我们估计的平均速度误差的DORIS解决方案小于3毫米/年。LCAVEL-1模型提供了索马里/努比亚板块对的新见解，因为DORIS技术具有在这两个板块上有几个台站的优势。我们还计算（并提供在这篇文章中）的水平运动的网站位于靠近板块边界或在当代模型中定义的变形区。这些计算可以用于进一步分析地球上这些不作为刚性板块运动的特定区域。
In the frame of the International DORIS Service (IDS), the Laboratoire d’Etudes en Géophysique et Océanographie Spatiales (LEGOS)/Collecte Localisation Satellites (CLS) Analysis Center (LCA) processes DORIS measurements from the SPOT, TOPEX/Poseidon and Envisat satellites and provides weekly station coordinates of the whole network to the IDS. Based on DORIS measurements, the horizontal and vertical velocities of 57 DORIS sites are computed. The 3D positions and velocities of the stations with linear motion are estimated simultaneously from the 12-year (1993–2004) combined normal equation matrix. We include 35 DORIS sites assumed to be located in the stable zones of 9 tectonic plates. For the motion of these plates, we propose a model (LCAVEL-1) of angular velocities in the ITRF2000 reference frame. Based on external comparison with the most recent global plate models (PB2002, REVEL, GSRM-1 and APKIM2000) and on internal analysis, we estimate an average velocity error of the DORIS solution of less than 3 mm/year. The LCAVEL-1 model presents new insights of the Somalia/Nubia pair of plates, as the DORIS technique has the advantage of having a few stations located on those two plates. We also computed (and provide in this article) the horizontal motion of the sites located close to plate boundaries or in the deformation zones defined in contemporary models. These computations could be used in further analysis for these particular regions of the Earth not moving as rigid plates.