DIURNAL WIND-INDUCED MIXING IN A SEA SURFACE LAYER ON THE UPPER SIDE OF A STRONG NEARSHORE CURRENT WITH A HIGH-FREQUENCY OCEAN RADAR AND A MICRO-SCALE PROFILER

Autor:	Yoshio Takasugi, Kenji Satoh, Masayuki Nagao, Takuro Shibuno, Akihiko Morimoto, Atsushi Suzuki, Shoichiro Kojima, Eisuke Hashimoto
Rok vydání:	2007
Předmět:	Shore geography geography.geographical_feature_category Turbulence Organic Chemistry Coral reef Atmospheric sciences Biochemistry law.invention Current (stream) Sea surface temperature Ocean surface topography Oceanography law Surface layer Radar Geology
Zdroj:	PROCEEDINGS OF HYDRAULIC ENGINEERING. 51:1433-1438
ISSN:	1884-9172 0916-7374
DOI:	10.2208/prohe.51.1433
Popis:	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.
Databáze:	OpenAIRE
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