A cross-correlation analysis of tidal current,water temperature and salinity records |
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Authors: | Hideo Nakajima Norio Hayakawa |
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Institution: | 1. Faculty of Engineering, Hiroshima University, Shitami, Saij?-ch?, 724, Higashi-hiroshima, Japan 2. Faculty of Engineering, Technological University of Nagaoka, 949-54, Nagaoka, Japan
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Abstract: | Fifteen day records of current velocity, water temperature and salinity were obtained at a coastal station in the Seto Inland Sea. It was observed that water movement was characterized by an exchange of two distinctive water masses east and west of the station. Cross-correlation analysis shows that, at the semi-diurnal period, the motion of these characteristic waters causes temperature and salinity variations. At frequencies higher than 2 cycles per day where power spectra of current velocity have a slope of ?5/3, coherence between current velocity and both water temperature and salinity decreases rapidly. |
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