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Role of Compressibility on Tsunami Propagation
Author(s) -
Abdolali Ali,
Kirby James T.
Publication year - 2017
Publication title -
journal of geophysical research: oceans
Language(s) - English
Resource type - Journals
eISSN - 2169-9291
pISSN - 2169-9275
DOI - 10.1002/2017jc013054
Subject(s) - compressibility , solver , reduction (mathematics) , mechanics , phase (matter) , geology , event (particle physics) , physics , mathematics , geometry , mathematical optimization , quantum mechanics
Abstract In the present paper, we aim to reduce the discrepancies between tsunami arrival times evaluated from tsunami models and real measurements considering the role of ocean compressibility. We perform qualitative studies to reveal the phase speed reduction rate via a modified version of the Mild Slope Equation for Weakly Compressible fluid (MSEWC) proposed by Sammarco et al. (2013). The model is validated against a 3‐D computational model. Physical properties of surface gravity waves are studied and compared with those for waves evaluated from an incompressible flow solver over realistic geometry for 2011 Tohoku‐oki event, revealing reduction in phase speed.