Year-to-year variation of cold waters around the korea strait |
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Authors: | Hong Sik Min Young -Ho Kim Cheol -Ho Kim |
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Institution: | (1) Marine Environment Research Department, Ansan P.O. Box 29, 425-600 KORDI, Seoul, Korea;(2) Department of Oceanography, College of Natural Sciences, Chonnam National University, 500-757 Gwangju, Korea |
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Abstract: | Year-to-year variation of bottom cold waters around the Korea Strait was investigated based on bottom temperatures measured
by submarine telephone cable between Pusan, Korea and Hamada, Japan from 1982 to 1992. The characteristics of bottom temperatures
could be divided into three different groups: the Korean side, the middle, and the Japanese side. Temperature drops in summer
appeared in all the three regions implying the intrusion of cold waters into the Korea Strait. Significant decreases in the
Korean side were observed in 1983, 1986, 1990, 1991, and 1992 when bottom temperatures were high in the middle. In contrast,
bottom temperatures significantly decreased in the middle in 1985, 1988, and 1989 when the temperature drops in the Korean
side were relatively small. This tendency for a negative relationship was also shown in the second mode of an EOF analysis.
In the years when bottom temperatures significantly decreased in the Korean side, the cold water along the east coast of Korea
expanded offshore and its temperature was low. On the contrary, cold water in the southern region of the Ulleung Basin developed
in the years when bottom temperatures decreased considerably in the middle. |
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Keywords: | cold water bottom temperature Korea Strait year-to-year variation Ulleung Basin |
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