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Effects of bathymetry complexity on tsunami propagation: a spherical harmonics approach
Geophysical Journal International ( IF 2.8 ) Pub Date : 2020-07-11 , DOI: 10.1093/gji/ggaa334
Amir Salaree 1, 2 , Emile A Okal 1
Affiliation  

S U M M A R Y This paper explores the effects on tsunami simulations of the level of detail of the bathymetric grid in use. For this purpose, we expand available bathymetric data sets of the Pacific Basin in spherical harmonics. For realistic scenarios of tsunamis generated by earthquake dislocations, we conclude that an expansion to a maximum degree lmax = 40, corresponding to wavelengths of 1000 km, is sufficient to reproduce the main features of the tsunami wavefield synthesized in deep water, that is, without considering final shoaling and interaction with coastal features.

中文翻译:

测深复杂度对海啸传播的影响:球谐函数法

总结 本文探讨了使用中的测深网格的详细程度对海啸模拟的影响。为此,我们以球谐函数扩展了太平洋盆地的可用测深数据集。对于地震错位产生的海啸的现实场景,我们得出结论,最大程度的扩展 lmax = 40,对应于 1000 公里的波长,足以再现深水合成海啸波场的主要特征,即没有考虑最终浅滩和与海岸特征的相互作用。
更新日期:2020-07-11
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