新安海域의 海洋學的 特性에 關한 硏究 = A study on the Oceanographical Characteristics of the Shin-an sea area.

다국어 초록 (Multilingual Abstract)

The purpose of this paper lies in collecting fundamental data which can contribute to basic studies on oceanograph and activities in fishery and marine industry by examining the oceanographical characteristics of the Shin-an sea area. To collect the fundamental data, the author examined oceanographical elements such as temperature, precipitation, water temperature, salinity, dissolved oxygen, transparency, pH, and nutruents in the Shin-an sea area, in February, May, September, and November in 1981 and 1982.
The result of this study is as follows.
The transparency and water temperature are high in summer when air temperature is high and the amount of precipitation is large, and low in winter when the amount of precipitation is small. This phenomenon shows that water temperature increases in proportion to air temperature.
The precipitation in September 1981 was 548.2mm, which is the largest amount. Salinity is 29.95‰ lowest in September because of the influx of lots of land water to the Shin-an sea area. And it is 33.62‰ highest in Fevruary. pH was low in September when air temperature and water temperature are high and the amount of precipitation is small, but a little high in spring and winter. But the range of pH proves to be narrow and pH of the Shin-an sea area is almost the same as the average pH of sea water.
NO＾-_2-N, PO＾-_4-P and a nutrient prevail in September when there is a large amount of precipitation. This phenomenon seems to have resulted from the influx of large amounts of organic matter as well as a large amount of precipitation from the land.
During studying the oceanographical elements. the amount of NO＾-_2-N is not changed according to the change of season : that is, there is no correlation between the amount of NO＾-_2-N and oceanographical elements. But PO＾-_4-P appeared in the largest amount in winter and in the smallest amount in spring.
Dissolved oxygen is 7.20cc/ℓ in February which is the highest amount, and 4.12cc/ℓ in September, the lowest amount. This phenomenon seems to have resulted from the consumption of large amount of dissolved oxygen that is related to oxidization of organic matter and the breathing of plants and animals.