Southward intrusion of the intermediate Oyashio water along the east coast of the Boso Peninsula, Japan II. Intrusion events into Sagami Bay
- 64 Downloads
In the previous paper (Yanget al., 1993), it was shown that there always exists the coastal salinity-minimum-layer (SML) water just off the Boso Peninsula. The coastal SML water is bounded by the current zone of the Kuroshio, and a relatively high salinity domain separates it from the offshore SML water which would be a continum of the North Pacific Intermediate Water. We suggested that the coastal SML water region indicates the pathway along which the Intermediate Oyashio Water intrudes into Sagami Bay. In this paper, by selecting seven cases where we found the coastal SML water having abnormally high oxygen content and low salinity, we try to follow the intrusion manner of the Intermediate Oyashio Water into Sagami Bay by using available hydrographic data taken routinely by various organizations in the period from 1973 to 1986. Some of these water can be traced from the observation line near the cape of Inubo to the central part of Sagami Bay, and its propagation speed along the coast is shown to be of order of 1 cm/s. The intruding intermediate Oyashio water usually has a complicated layered structure in it, and its time scale of persistence is shown to be only a few months.
KeywordsOxygen Content High Salinity East Coast High Oxygen Propagation Speed
Unable to display preview. Download preview PDF.
- Kiso, K., I. Kumagai and M. Kaeriyama (1987): Spring migration of Masu Salmon (Oncorhynchus masou) as determined by the tagging experiments performed in Sizugawa Bay, the east of Honshu, Japan.Bull. Tohoku Reg. Fish. Res. Lab.,49, 89–101 (in Japanese)Google Scholar
- Omori, M. (1967):Calanus cristatus and submergence of the Oyashio water.Deep-Sea Res.,14, 525–532.Google Scholar
- Sekine, Y. (1988): Anomalous southward intrusion of the Oyashio east of Japan. 1. Influence of the seasonal and interannual variations in the wind stress over the North Pacific.J. Geophys. Res.,93, 2247–2255.Google Scholar
- Taira, K. and T. Teramoto (1986): Path and volume transport of the Kuroshio current in Sagami Bay and their relationship to cold water masses near Izu Peninsula.J. Oceanogr. Soc. Japan,42, 212–223.Google Scholar
- Yang, S. K. (1989): Southward intrusion of the intermediate Oyashio Water along the east coast of the Boso Peninsula, Japan. Sc. D. dissertation, University of Tokyo, 124 pp.Google Scholar
- Yang, S. K., Y. Nagata, K. Taira and M. Kawabe (1993): Southward intrusion of the Intermediate Oyashio Water along the east coast of the Boso Peninsula—I. Coastal salinity-minimum-layer water off the Boso Peninsula.J. Oceanogr.,49, 89–114.Google Scholar