• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>OCEANS 2016 MTS/IEEE Monterey >On the role of frequency dispersion on the trans-pacific tsunamis: Study of the 2010 and 2015 Chilean tsunamis
【24h】

On the role of frequency dispersion on the trans-pacific tsunamis: Study of the 2010 and 2015 Chilean tsunamis

机译：论频率分散对跨太平洋海啸的作用：2010年和2015年智利海啸研究

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The trans-pacific propagation of the 2010 and 2015 Chilean tsunamis have been simulated by resolving both the Saint-Venant and the Boussinesq equations, these latter equations taking into account the frequency dispersion of waves. Numerical results show that the frequency dispersion simulation must be considered to reproduce the wave heights and arrival times recorded by several DART buoys in the Pacific Ocean. Several grid resolutions have been tested using either the Saint-Venant or the Boussinesq model (10', 5' and 2'). Only the Saint-Venant simulation at a 5' resolution and the Boussinesq simulation at a 2' resolution allow to reproduce the amplitudes and arrival times of the first waves. Numerical results indicate that frequency dispersion has a significant impact on the computed waveforms and suggest that the Saint-Venant code generates numerical dispersion similar to the physical frequency dispersion. It has been confirmed by one dimensional sensitivity tests. By comparing both events (2010 and 2015), we show that the frequency dispersion is stronger for the second event and it has been confirmed by the analysis of the Absolute Pressure Gages KSR1 and MRT1 spectrograms at some 17000 km from the source. Indeed, the main wave energy is contained in the first waves for the 2010 events and in the following waves for the 2015 event. Nevertheless, for the 2010 event, we also detect some late arrival waves at the APG KSR1, three hours after the first arrival time, with energy only two times lower than the first wave one.
机译：通过解析Saint-Venant和Boussinesq方程，已经模拟了2010和2015年智利海啸的跨太平洋传播，这些方程考虑了波的频率分散。数值结果表明，频率分散仿真必须被认为是再现太平洋几个镖浮标记录的波浪高度和到达时间。使用Saint-Venant或Boussinesq模型（10'，5'和2'）测试了几个网格分辨率。仅在5'分辨率下的Saint-Venant模拟和2'分辨率的Boussinesq模拟允许再现第一波的幅度和到达时间。数值结果表明，频率色散对计算的波形具有显着影响，并建议圣文门代码产生类似于物理频率分散的数值分散。它已被一维灵敏度测试确认。通过比较事件（2010年和2015），我们表明，第二次事件的频率分散更强，并且已经通过距离源约17000公里的绝对压力计KSR1和MRT1谱图来证实。实际上，主要波能量包含在2010年事件的第一个波浪中，以及2015年事件的下面的波浪中。尽管如此，对于2010年的事件，我们还在第一个到达时间后三个小时的APG KSR1中检测到一些迟到的抵达波浪，能量低于第一波的能量。

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