新安海域의 海洋學的 特性에 관한 硏究 = A Study on the Oceanographical Chracteristics of the Shinan Sea Area

다국어 초록 (Multilingual Abstract)

The purpose of this study is to investigate and analyze the physical and chemical characteristics (water temperature, salinity, pH, DO, COD, transparency, solid solution, and nutrient) of the Shinan sea area extending from February to November in 1992 and to contribute to the protection of sea ecosystem and sea environment through research on sea pollution.
The following are the results. The water temperature of the continental side sea was lower in winter and higher in summer than that of the island side sea. This seems to have resulted from the difference of specific heat between in land and in sea. Salinity was highest in April and lowest in August. This may be viewed in the way that much precipication and fluctuation of land water from the mouth of Mokpo in the rainy season, summer, have influenced on the salinity of the above sea area. The range of pH proved to be rather high in summer. This seems to have resulted from the features of atmosphere and land and water distribution of this area. DO was highest in February and lowest in August on account of the influence of water temperature and activities of marine inhabitants.
But COD was highest in August and lowest in April. This also had a close relation to water temperature and activities of marine inhabitants. Judging from the standard amount of inhabitant environment of marine organisms, 2 mg/l, the above-mentioned area was found rather clean. Transparency was high in summer and low in winter. This may be viewed in the way that the shallow soundings and monsoon had an influence on the spout of marine deposits such as silt and clay. Solid solution was high in spring and winter. The correlation coefficient to the transparency was r=-0.927 in the continental side sea and r=-0.845 in the island side sea. This showed reverse distribution. PO4-P was high in spring and winter and low in summer and autumn. This resulted from the fact that the amount of consumption decreased in winter on account of the weakening of plankton multiplication, while the amount of supply increased on account of the decomposition of the animal dead bodies. NH_4-N was high in spring, when all living creatures are enlivened. NO_2-N and NO_3-N was high in autumn owing to the cycle process of nitrate. DIN was high in autumn and winter and the Shinan sea area was found one of the malnourished area in total nitrogen quantity The correlation coefficient between PO_4-P and DIN in the continental side sea was r=0.368 on the surface and r=0.821 at the bottom, while that in the island side sea was r=0.6833 on the surface and r=0.895 at the bottom. This showed that the island side sea was higher and more stable in correlation than the continental side sea.
According to the above results, the author found that the Shinan sea area was one of the malnourished and rather clean sea area and was proper for an ecosystem environment.