北黄海典型断面生源要素四季变化的研究

Study of Seasonal Changes of Biogenic Elements at Typical Transects in North Yellow Sea

在2006年7月至2007年10月对北黄海两个典型断面4个航次调查的基础上,分析并讨论了两断面上生源要素的分布情况及其四季变化。结果表明DO的含量与饱和度自春至冬,呈现先降低后升高的趋势,在秋季降至最低点;而PO4-P和DIN的含量,亦是先减小后增大,其浓度的极低值出现在夏季;SiO3-Si的季节变化趋势有所不同,自春季至冬季,它呈现逐渐增大的变化趋势。此外,自春季开始形成,至秋季消亡的黄海冷水团是海区中部重要的营养盐贮库。

Based on the four cruises carried out from July 2006 to October 2007 at the two typical sections in North Yellow Sea, the distributions and seasonal changes of biogenic elements were discussed at the two transects. The major results showed that the DO content and saturation showed the first rise after lower from spring to winter, the lowest in the autumn; the concentrations of PO4-P and DIN were also reduced after the first increase, just the very low values appeared in summer; while the SiO3-Si was different, it＇s always increase from spring to winter. In addition, the Yellow Sea Cold Water Mass which was beginning formation in spring and perish in autumn, was an important store of nutrients in the central area.