Sand Point, Alaska Tsunami Forecast Grids for MOST Model

The Sand Point, Alaska Forecast Model Grids provides bathymetric data strictly for tsunami inundation modeling with the Method of Splitting Tsunami (MOST) model. MOST is a suite of numerical simulation codes capable of simulating three processes of tsunami evolution: generation, transoceanic propagation, and inundation of dry land. Tsunami waves are computationally propagated across a set of three nested grids (A, B, and C), each of which is successively finer in resolution, moving from offshore to onshore. Nearshore details are resolved to the point that model output can be directly compared with tide gauge observations and can provide estimates of wave arrival time, wave amplitude and simulation of wave inundation onto dry land. A Grid Resolution: 120 arc sec. B Grid Resolution: 17.9 arc-sec. C Grid Resolution: 3 arc-sec in the x direction. 2 arc-sec in the y direction.

阿拉斯加桑德波因特预报模型网格数据集仅提供用于海啸分裂法（Method of Splitting Tsunami，简称MOST）模型的海啸淹没模拟专用水深数据。MOST是一套数值模拟程序集，可模拟海啸演化的三大核心过程：海啸生成、跨洋传播及陆地淹没。海啸波将通过三套嵌套网格（A、B、C）进行数值传播，三套网格的空间分辨率从远海到近岸依次提升，精度逐步细化。近岸细节被充分解析，使得模型输出可直接与验潮站观测数据对比，并能估算海啸波到达时间、波幅，以及模拟海啸波在陆地上的淹没过程。A网格分辨率：120角秒；B网格分辨率：17.9角秒；C网格分辨率：X方向为3角秒，Y方向为2角秒。