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根据水通量的箱式模型,南海由跃层深度和海槛深度分成3个箱子.当海水上升至箱子Ⅰ时,由于生物的同化作用,海水中溶解的无机碳转化成颗粒态有机碳.这部分颗粒碳有一部分在箱子Ⅰ中即分解转化为溶解态的无机碳,而其余部分沉降至箱子Ⅱ,同样在箱子Ⅱ中一部分分解,一部分继续沉降至箱子Ⅲ,在箱子Ⅲ中也进行同样过程,最后的一部分颗粒碳未被溶解而进入沉积物中.由南海的初级生产力、沉积速率、沉积物含碳量及深海盆水溶解氧的平均消耗率计算了南海碳的固-液通量;根据碳在各箱子的质量平衡方程,求得了各箱子碳的通量值,从而建立起南海碳的通量模型.进入南海的碳通量,占总输入碳99％的碳主要经由中层水和底层水进入南海,然后随海水的上升而进入南海上层,在南海上层与河水和雨水带来的,占总输入的1％的碳相汇合.进入南海碳的总量为601×104mol/s,而通过沉积离开南海的碳量为3.8×104mol/s,即有0.6％的碳损失到沉积物中.南海对大气而言,净通量是吸收约为4.4×104mol/s,而南海对全球海洋的净通量是输出约1×104mol/s,碳在南海箱子Ⅰ、Ⅱ、Ⅲ的更新时间分别为1.5a、44a和79.3a.
According to the box model of water flux, the South China Sea is divided into three boxes by the depth of the thermocline and the depth of the sill, and when the sea water rises to the box I, the dissolved inorganic carbon in seawater is transformed into the particulate organic carbon due to the biological assimilation. Part of this part of the granular carbon is decomposed and decomposed into the dissolved inorganic carbon in the box I, while the rest settles to the box II, also partially decomposes in the box II, and partly continues to settle to the box III, and similarly in the box III Process, the last part of the particles of carbon into the sediment is not dissolved.From the South China Sea primary productivity, sedimentation rate, sediment carbon content and the average consumption rate of dissolved oxygen in the deep sea basin to calculate the South China Sea carbon solid-liquid flux ; Based on the mass balance equation of carbon in each box, the flux value of each box carbon was obtained to establish the flux model of the South China Sea. The carbon flux into the South China Sea accounted for 99% of the total input carbon via the middle layer water And the bottom water into the South China Sea, and then as the sea water rising into the upper reaches of the South China Sea, in the upper South China Sea and the convergence of water and rainwater, accounting for 1% of the total input carbon phase into the South China Sea total carbon 601 × 104m ol / s, while the amount of carbon leaving the South China Sea deposited by sedimentation is 3.8 × 104mol / s, ie, 0.6% of the carbon is lost to the sediments.The South China Sea has a net flux of about 4.4 × 104mol / s for the atmosphere, The net flux of the South China Sea to the global oceans is about 1 × 104mol / s, and the renewal time of carbon in the South China Sea I, Ⅱ and Ⅲ is 1.5a, 44a and 79.3a, respectively.