Paper Info
Title
Coastal Acoustic Tomography of the Neko-Seto Channel with a Focus on the Generation of Nonlinear Tidal Currents-Revisiting the First Experiment
Abstract
The first coastal acoustic tomography (CAT) experiment site of the Neko-Seto Channel was revisited to elucidate the propagation and generation characteristics of the M-2 and M-4 tidal currents with a second CAT experiment, which was conducted from 3-6 April 2018 (local time). Two-dimensional flow fields of the M-2 and M-4 tidal currents and the residual current were reconstructed using a coast-fitting inversion model with the reciprocal travel-time data of five acoustic stations. The M-2 tidal current is a progressive-type wave that propagates eastward at a speed of 0.7 ms(-1), much slower than expected for free progressive tides in this region (19 ms(-1)). The M-4 nonlinear current constructed an out-of-phase relationship between the western and eastern halves of the tomography domain, implying the generation of standing-type waves. Such nonlinear processes led to flood- and ebb-dominant tidal current asymmetries for the western and eastern halves of the model domain, respectively. The two-day mean residual currents constructed a northeastward current with a maximum speed of 0.3 ms(-1) in the western half of the model domain and a clockwise rotation in the eastern half. The averaged inversion errors were 0.03 ms(-1), significantly smaller than the amplitude of the aforementioned currents.
Year
DOI
Venue
2022
10.3390/rs14071699
REMOTE SENSING
Keywords
DocType
Volume
coastal acoustic tomography, coast-fitting inversion, semidiurnal tidal current, M-4 nonlinear current, tidal asymmetry, Neko-Seto Channel
Journal
14
Issue
ISSN
Citations 
7
2072-4292
0
PageRank 
References 
Authors
0.34
0
9
Name
Order
Citations
PageRank
Minmo Chen101.01
Aruni Dinan Hanifa200.34
Naokazu Taniguchi300.68
Hidemi Mutsuda400.34
Xiao-Hua Zhu500.68
Zenan Zhu600.34
Chuanzheng Zhang700.34
Ju Lin800.34
Arata Kaneko900.68