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利用2015年春(5月)、夏(8月)、秋(11月)、冬(2月)4个季节在东海区标准断面调查所得的资料,通过对5项营养盐综合分析研究了营养盐表层、10 m层、底层的含量变化及其随季节的分布特征,并对其变化规律和影响因素等进行探讨分析。研究表明:无机氮、磷酸盐及硅酸盐含量均值最高都在底层,几乎都呈现由表层至底层逐渐升高趋势。2015年东海区营养盐分布具有明显的季节变化,对于磷酸盐和无机氮的含量表现为冬季>秋季>夏季>春季,硅酸盐的含量表现为夏季>冬季>秋季>春季。东海营养盐主要来源于长江冲淡水,往往受长江冲淡水和台湾暖流同时控制,浓度大体呈现自西向东递减的变化趋势。
Based on the data obtained from the investigation of the standard cross-section surveys in the East China Sea in the spring of 2015 (May), summer (August), autumn (November) and winter (February), the nutrient salt Surface layer, 10 m layer, the bottom of the content changes and distribution characteristics with the seasons, and its changes and influencing factors discussed and analyzed. The results show that: the highest content of inorganic nitrogen, phosphate and silicate are in the bottom, almost all showed a gradual upward trend from the surface to the bottom. The distribution of nutrients in the East China Sea in 2015 showed obvious seasonal changes. The content of phosphate and inorganic nitrogen in winter> autumn> summer> spring, the content of silicate was in summer> winter> autumn> spring. The nutrients in the East China Sea are mainly derived from the fresh water from the Yangtze River and are often controlled by both the Yangtze River flushing water and Taiwan’s warm current. The concentrations generally show a decreasing trend from west to east.