濟州道 三陽沿岸海域의 海洋環境學的 硏究 : 水溫, 鹽分 및 溶存酸素의 分布 The distributional characteristics of temperature, salinity and dissolved oxygen = An oceanic environmental investigation of the coastal waters of Samyang, Cheju Island

국문 초록 (Abstract)

1983年 2月부터 11月까지 每月 三陽沿岸海域에서 調査된 海洋觀測結果로부터 三陽沿岸水의 季節別 受蘊, 鹽分 및 溶存酸素의 分布特性을 把握하였다.
三陽沿岸海域에는 年中 外洋水보다 低溫, 低鹽인 三陽 特有의 沿岸水가 形成되어 沿岸으로부터 약 1 ㎞ 外陽까지 表層을 덮으면서 擴張하고 있으며, 그 勢力은 夏季에 가장 發達하고 있다. 그러나 中 底層에서는 對馬暖流 등의 영향을 받고 있는 高溫, 高鹽의 外洋水가 沿岸으로 接近하여 沿岸水와의 사이에 현저한 前線域을 形成하고 있으나, 冬季에는 全 海域의 上·下層이 거의 均質한 混合水로 된다.
夏季에 降水 등에 의한 多量의 陸水流入으로 沿岸水는 28.5℃의 水溫과 27.9‰의 極低鹽水로 되며, 冬季에는 外洋水의 영향으로 13℃와 34.7‰을 나타내고 있다. 또한, 春 夏季의 溶存酸素量은 沿岸水이 外洋보다 약 0.3㎖/ℓ(5%) 높은 5.5∼6.5㎖/ℓ였다.
周年을 통한 鉛直混合層이 表層으로부터 沿岸域에서는 20m層까지, 外洋은 30m層까지 形成되며, 夏季의 外洋域에서는 비교적 安定된 成層海洋을 나타내고 있으나 三陽과 新村浦口의 앞 海域에는 淺海潮汐前線이 形成되고 있다.

다국어 초록 (Multilingual Abstract)

The seasonal distribution and characteristics of temperature, salinity and dissolved oxygen on the coast of Samyang were studied based on the oceanographic data compiled from February to November of 1983.
The peculiar coastal sea water of the area was annually formed by the temperature and salinity lower than open sea water, and it was extended to about 1 Km off the coast, covering only the surface layer and such a phenomenon was most developed in summer, And then, the open sea water was strenuously appoached to the coast in winter, particularly, at middle and bottom layer mainly influenced by Tsushima warm current and it formed vertically homogeneous water owing to the strong wind and tidal current.
In summer, the sea surface temperature and salinity of coastal water were 28.5℃ and 29.7％ by inflowing of much fresh water, while in winter they were, 13℃ and 34.7％, respectively. Mean value of dissolved oxygen concentrated at surface layer of the coastal water during the period Feb. -June was 5.5-6.5㎖/ℓ, and it was higher than open sea water by about 0.3㎖/ℓ(3％).
Through out the year, vertical mixing layer influenced by wind and tidal current in the coastal area was formed at depth of 20m and it was deeper at open sea area about 10m depth that of the area, but comparatively stable stratification was seen at the open sea area in summer. The shallow tidal front was found near the enterance of Samyang and Shinchon.