...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Constraints on vertical crustal motion for long baselines in the central Mediterranean region using continuous GPS
【24h】

Constraints on vertical crustal motion for long baselines in the central Mediterranean region using continuous GPS

机译：使用连续GPS约束地中海中部地区长基线的垂直地壳运动

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

GPS-determination of vertical crustal velocity relative to a globally defined reference frame is limited by the accuracy of the reference frame origin and scale. However, the precision of relative vertical rates at regional-distance scales remains largely unexplored. We investigated the precision of regional-scale vertical velocity estimates using data from seven continuously operating GPS stations located in the central Mediterranean. The stations form a network of aperture 500 km and each has been in operation for at least 5 yr. We used published constraints on recent crustal uplift inferred from late Quaternary shoreline data to aid in the definition of a local vertical reference frame for GPS rates to facilitate an assessment of GPS vertical precision. We explored different methods of defining the local reference frame. The simplest method involves the estimation of a single scalar translation parameter. Adjusting the reference frame by this simple method yields agreement between CGPS and Holocene shoreline data sets at the level of 0.2 to 0.4 mm/yr. Relative rates determined using CGPS are also consistent with tide gauge records and sea level determined by satellite altimetry at the level of about 0.2 mm/yr. These results suggest that regional-scale relative velocity precision well below the mm/yr-level is now possible using continuous GPS.
机译：相对于全局定义的参考系的GPS垂直地壳速度的确定受到参考系原点和比例尺精度的限制。但是，在区域距离尺度上相对垂直速率的精度仍未得到充分探索。我们使用位于地中海中部的七个连续运行的GPS站的数据调查了区域尺度垂直速度估计的精度。这些站组成了一个500公里孔径的网络，每个站已经运行了至少5年。我们使用已发布的关于从第四纪晚期海岸线数据推断出的最近地壳隆升的约束条件来帮助定义GPS速率的本地垂直参考系，以方便评估GPS垂直精度。我们探索了定义局部参考系的不同方法。最简单的方法涉及单个标量转换参数的估计。通过这种简单的方法调整参考系，可以使CGPS和全新世海岸线数据集之间的一致性达到0.2至0.4 mm / yr。使用CGPS确定的相对速率也与潮汐仪记录和卫星测高仪确定的海平面在约0.2毫米/年的水平一致。这些结果表明，使用连续GPS现在可以实现远低于mm / yr水平的区域尺度相对速度精度。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号