夏季南黄海总有机碳的分布特征及其影响因素

Distribution of Total Organic Carbon and Its Influence Factors in the Southern Yellow Sea in Summer

依据2006年7-8月对南黄海调查得到的总有机碳（TOC）数据,探讨了南黄海TOC的分布特征及其控制因素。结果表明：2006年夏季南黄海TOC质量浓度范围为0.91~2.53 mg/L,平均值为1.66 mg/L。北部近岸TOC质量浓度较高,呈现由近岸向外海递减的变化趋势;而南部近岸TOC值则较低,且分布趋势也与北部相反。在垂直方向上,表层TOC值最高,随着深度的增加而降低。TOC的分布趋势主要受控于水文结构,但在某些海流影响较小、生物量较大的海域,生物生产对TOC的含量也有一定的贡献。

The distribution patterns and the controlling factors of Total Organic Carbon （TOC） in the southern Yellow Sea are analyzed, based on the data collected during the southern Yellow Sea investigation in July and August, 2006. It is shown from the results that in summer, 2006, TOC concentration in the southern Yellow Sea ranged between 0.91 and 2.53 mg/L, with a mean value of 1.66 mg/L. The concentration in the north of the coastal water is relatively high, and become decreased from the coastal water to the open sea, while TOC concentration is lower in the south of the coastal water, with a tendency of TOC increase toward the further offshore. In vertical distribution, TOC values of the surface layer are the highest, decreasing with depth increase. The distribution of TOC is primarily controlled by hydrological structure, but in some sea area where there is greater biomass and less effect is given by current, biological production may have certain contribution to the TOC concentration.