Observations of an intrusion of a warmer and less saline water mass into a bay |
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| Authors: | Toshio Yamagata Shin-Ichiro Umatani Noriaki Masunaga Tomonori Matsuura |
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| Institution: | 2. Fukui Prefectural Fisheries Laboratory, Urazoko, Tsuruga 914, Japan |
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| Abstract: | Detailed hydrographic observations were made in Wakasa Bay, Japan, in August 1979 as the first of a series on the topic of bay intrusions. An anomalous water tongue, evident at a depth of 50 m, was observed to move eastward into the bay at a speed of about 10 km day−1. The width of the tongue was about 20 to 30 km in agreement with the Rossby internal radius of deformation. The results of current meter measurements and the observed temporal and spatial evolution of the temperature field near the front of the anomalous water tongue have suggested that ageostrophic cross-frontal motion, in balance with the along-front acceleration, may be important in our understanding of intrusion processes. |
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