황해 남동해역 투명도의 계절 변화 = Seasonal Variation of Transparency in the Southeastern Yellow Sea

다국어 초록 (Multilingual Abstract)

The data of Secchi disc observation collected during 1966-1990 were analyzed to investigate the seasonal variation of transparency in the southeastern Yellow Sea. The bimonthly distribution of mean transparency showed that the isolines of transparency were roughly parallel to the isobaths. The transparency was low (3 m in February and 8 m in August) if the shallow water less than 20 m depth in comparision to the higher values (l0 m in February and 17 m in August) in the deeper water. The lowest transparency was found in winter. The transparency increased in spring and the highest transparency occurred in stammer. The water becomes turbid in autumn. Suspended solid concentrations in winter are ranged from 28 to 130 ㎎/ℓ, and from 8 to 60 ㎎/ℓ in summer. The seasonal variation of transparency seems to be mainly affected by resuspension of solid Iron the bottom. The amounts of suspended solid are large in winter due to the vertical convection by coaling effect and tubulence by the song wind, and small in summer due to the strong stratification and weak wind.