Observation of the 2009 Samoa tsunami by the NEPTUNE‐Canada cabled observatory: Test data for an operational regional tsunami forecast model
Observation of the 2009 Samoa tsunami by the NEPTUNE‐Canada cabled observatory: Test data for an operational regional tsunami forecast model
复制标题
NEPTUNE-加拿大有线观测站对 2009 年萨摩亚海啸的观测：区域海啸预报模型的测试数据
DOI：
10.1029/2011gl046728
复制
发表时间：
2011
影响因子：
5.2
通讯作者：
M. Krassovski
中科院分区：
文献类型：
--
作者：
R. Thomson;I. Fine;A. Rabinovich;S. Mihaly;E. Davis;Martin Heesemann;M. Krassovski
作为NEPTUNE - Canada电缆海底观测站的一部分，在2009年夏末，在太平洋东北温哥华岛西南海岸向海100至2600米的深度安装了六个高精度底压记录仪。这些仪器将大约0.1毫米等效海平面高度的1秒底压数据传输到维多利亚大学的数据管理和存档系统（DMAS）。2009年9月30日，该阵列记录到与南太平洋萨摩亚8.1级地震产生的跨洋海啸有关的振幅为2.5至6厘米的波浪。这些公海观测结果没有受到海岸效应的影响，表明未来海啸事件的NEPTUNE记录可以有效地用作区域海啸数值预报模式的实时输入。我们通过显示使用2009年事件的领先波浪列的区域模式模拟的波浪形式与大陆架站和附近海岸潮汐计观测到的海啸记录很好地一致来验证这一命题。该模式模拟的海啸波在局部区域的准确度也明显高于全球尺度海啸模式。这种将电缆观测站的“原始”开放海洋数据吸收到可操作的海啸预报模型中的能力，使提供更新的波浪信息成为可能，这可能有助于减轻未来海啸接近不列颠哥伦比亚省西海岸和华盛顿州北部的影响。
As part of the NEPTUNE‐Canada cabled seafloor observatory, an array of six high‐precision bottom pressure recorders was installed in the late summer of 2009 at depths from 100 to 2600 m seaward of the southwest coast of Vancouver Island in the northeast Pacific. The instruments transmit 1‐sec bottom pressure data at roughly 0.1 mm equivalent sea level height to the Data Management and Archiving System (DMAS) at the University of Victoria. On September 30, 2009, the array recorded waves of 2.5 to 6 cm amplitude associated with the transoceanic tsunami generated by the Mw = 8.1 Samoa earthquake in the South Pacific. These open‐ocean observations were uncontaminated by coastal effects, demonstrating that NEPTUNE records from future tsunami events can be effectively used as realtime input to a regional numerical tsunami forecast model. We validate this proposition by showing that wave forms simulated by the regional model using the leading train of waves of the 2009 event are in good agreement with observed tsunami records for both the shelf stations and nearby coastal tide gauges. Tsunami waves simulated by this model are also significantly more accurate for local regions than those determined by global‐scale tsunami models. This ability to assimilate “pristine” open‐ocean data from the cabled observatory into an operational tsunami forecast model makes it possible to provide updated wave information that could help mitigate the impact of future tsunamis approaching the west coast of British Columbia and northern Washington State.