Estimating the ratios between the nutrients and the apparent oxygen utilization in the South China Sea, China
Estimating the ratios between the nutrients and the apparent oxygen utilization in the South China Sea, China
复制标题
作者：
Lin Hui
氮、磷是植物生长的基础元素。这些元素被上层水中的浮游植物带走。当浮游植物和一些有机碎屑沉降后，这些元素通过生物氧化作用得以再生，因此其含量的分布特征是在水柱中自上而下逐渐增加。当然，营养盐的分布与不同的海域有关。虽然对南海进行了多次的调查，获得了大量的营养盐资料，但对这些营养盐参数的分布和更新的研究还比较少，因此本文利用1998年6月和11月两个航次的资料，对南海营养盐的一些特征进行了研究。在分析营养盐垂直分布的基础上，得出了表观耗氧量与营养盐的关系。结果表明，在有机质再生过程中，混合水进入深度约为75~ 1000 m的富氧水体，有机质再生对水体中营养盐的垂向变化影响最大。在1000 ~ 2700 m深度范围内，水体的供氧效率较高，但水体中再生营养盐的比例变小。
Nitrogen and phosphorus are the elements which are the basis of phytoplanktons' growth. These elements are removed by the phytoplankton in the upper water. When the phytoplankton and some organic debris subside, these elements are regenerated by biologic oxidation, so the distributed characteristic of the contents is that the contents increase by degrees from upper to bottom in the water column. Of course, the distribution of nutrients is connected with different sea areas. Although the south sea is researched time after time and many data of nutrients are got, the study of the distribution and the regeneration of these parameters are short, so the data got by two cruises in June and November of 1998 are used to study some characteristics of those nutrients. On the basis of analyzing the vertical distribution of the nutrients, the relationship between AOU (apparent oxygen utilization) and those nutrients is got. The result shows that during organic matter regenerating, the mixing water otfers water body whose depth is about 75～(1 000 m) extra-oxygen and the vertical variation of those nutrients in the water column are mostly influenced by regeneration. The efficiency of oxygen's supplement takes place between the depth of (1 000 m) and (2 700 m), but the proportion of the regenerated nutrients in water becomes little.