Abstract
In order to monitor sea surface current and transportation of heat and material in and around of coral reefs, we conducted field monitoring of wide-ranging (-70km) sea surface current using High-Frequency (HF) ocean radar, and vertical microstructure in the sea surface layer to estimate magnitude of turbulent vertical mixing. We here report time variation of wind-induced mixing in the sea surface layer which was the upper side of a strong near shore current. In our field measurement off Yaeyama Islands on September 15, 2005, the HF ocean radar could captured the presence of strong near-shore current over 50 cms-1, and the vertical microstructure measurement revealed that both elevated water temperature and uniformalization in the sea surface layer corresponding to increase of turbulent energy dissipation (e). Results suggested that energy led to this uniformalization seemed to derive from not the nearshore current but the ocean surface wind.
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