앵강만 해황분포의 계절변동 특성

Seasonal Characteristics of Sea Conditions in Aenggang Bay

In order to acquire the data for understanding of sea conditions as well as the management of fishing grounds, seasonally oceanographic field measurements have been conducted from November 1998 to July 1999 in Aenggang Bay which is located at the southern coast of Korea. All the field data revealed a great deal of variation ranging such as 8.04~24.51℃ in water temperature, 31.87~34.08 in salinity, 21.36~26.55 in density(=sigma-t), 1.5~9.6 in transparency, and 6~11 in water color. In Aenggang Bay the stratification was easily destroyed by dropping of air temperature in autumn and winter, and a thermal front was made between the cold inner bay waters and the outer bay waters, meeting in the middle of the bay when a large amount of outer bay waters come into the bay. On the contrary, in spring and summer a strong thermocline with a decline of approximately 0.4℃/m was made around the depth of 5m because of the rise of air temperature. However, this front appears at the surface of the inside mouth of the bay when a large amount of outer bay waters invades at flood tide whereas it disappears easily at the strong wind.