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Seasonal variation of the principal tidal constituents in the Bohai Sea by Wang, Daosheng; Pan, Haidong; Jin, Guangzhen; Lv, Xianqing is a Earth and Planetary Sciences article available to read on EtoBox.

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Abstract. The seasonal variation of tides plays a significant role in water level changes in coastal regions. In this study, seasonal variations of four principal tidal constituents, M2, S2, K1, and O1, in the Bohai Sea, China, were studied by applying an enhanced harmonic analysis method to two time series: 1-year sea level observations at a mooring station (named E2) located in the western Bohai Sea and 17-year sea level observations at Dalian. At E2, the M2 amplitude and phase lag have annual frequencies, with large values in summer and small values in winter, while the frequencies of S2 and K1 amplitudes are also nearly annual. In contrast, the O1 amplitude increases constantly from winter to autumn. The maxima of phase lags appear twice in 1 year for S2, K1, and O1, taking place near winter and summer. The seasonal variation trends estimated by the enhanced harmonic analysis at Dalian are different from those at E2, except for the M2 phase lag. The M2 and S2 amplitudes show semi-annual and annual cycles, respectively, which are relatively significant at Dalian. The results of numerical experiments indicate that the seasonality of vertical eddy viscosity induces seasonal variat

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Author

Wang, Daosheng; Pan, Haidong; Jin, Guangzhen; Lv, Xianqing

Publisher

Copernicus GmbH; Göttingen: Copernicus Publ.; Copernicus Gesellschaften (ISSN 1812-0792)

Published

2020

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)