渤海无机氮年际变化分析

An Analysis of the Annual Variety of Inorganic Nitrogen in the Bohai Sea

根据—年渤海断面资料分析,高浓度无机氮水体从断面近岸海域通过底层水体逐年向 19851998 渤海中部迁移和扩散。断面海域底层水体无机氮浓度的年际变化可以比较稳定地反映水体的富营养化程度。渤海断面海域硝酸盐氮、亚硝酸盐氮年际变化的主要部分原本呈现准平衡态变化,由于海水污染程度的持续增长,破坏了这种准平衡态年际变化,海洋生物化学过程仅能够维持其年际变化的次要部分呈现-准平衡态变化,但是不足以阻止其主要部分脱离准平衡态变化。海洋生物的繁殖和聚集密度对无机氮浓度的空间分布有重要影响。

According to the Bohai Sea cross-section data during 1985~1998, the high concentration inorganic nitrogen in the Bohai Sea section bottom layer water nearshore diffused and transferred to the middle of the Bohai Sea year after year. The interannual variations of the concentration of inorganic nitrogen in the Bohai Sea section bottom layer water may reflect the degree of eutrophication more steadily. The nitrate nitrogen and nitrite nitrogen are used to show quasi-equilibrium state interannual variations, but with the aggravation of seawater pollution, the quasi-equilibrium state of interannual variations has been broken and the marine biological-chemical processes can only maintain the secondary part of the interannual variations in a quasi-equilibrium state, but are not sufficient to prevent the main part of interannual variations from deviating from the quasi-equilibrium state. The spatial distributions of inorganic nitrogen would be affected by the reproduction and swarming of marine life.