Abstract
Surface circulation in Sagami Bay located in the south of Honshu, Japan, was analyzed using high-frequency (HF) radar located at Izu Oshima Island and at Arasaki (the Miura Peninsula). Prominent current direction indicated counterclockwise circulation in the western part and could not be defined in the eastern part of Sagami Bay. EOF 1st mode score indicated that surface circulation is influenced by the inflow of the Kuroshio water. Stronger currents inflow via Oshima east channel generated counterclockwise circulation in the northern part of Sagami Bay. Weaker currents inflow via Oshima east channel led to clockwise circulation. Kuroshio warm water inflow from Oshima west channel led to counterclockwise circulation. These circulations were defined by sea level anomalies at Mera, Oshima, and Kozu islands. The EOF 2nd mode implied wind-driven current. Higher modes indicated dipole modes (North–South or East–West) and eddy-like mode. Consequently, three or more patterns for surface currents were found in Sagami Bay.
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Acknowledgements
We would like to express our gratitude to Professor Emeritus H. Nagashima and Professor Y. Kitade of Tokyo University of Marine Science and Technology (TUMSAT) for their comments. This study was supported by Mr. Shirakawa and Ms. Chen, who graduated TUMSAT.
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Nakano, H., Matsusaka, M., Nishimura, I., Yoritaka, H., Nemoto, M., Yoshida, J. (2020). Statistical Analysis of Surface Circulation in Sagami Bay Using High-Frequency (HF) Radar. In: Ceccaldi, HJ., Hénocque, Y., Komatsu, T., Prouzet, P., Sautour, B., Yoshida, J. (eds) Evolution of Marine Coastal Ecosystems under the Pressure of Global Changes. Springer, Cham. https://doi.org/10.1007/978-3-030-43484-7_4
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DOI: https://doi.org/10.1007/978-3-030-43484-7_4
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