以水温为控制因素的一定强度的水文学跃层是氧最小值形成的基本原因;处于t,σ_t最大垂直梯度之下的平流层,流速缓慢补氧量小,而生化及无机氧化作用耗氧量偏大;原与大气保持过平衡的氧,经过漫长时间的赤字支出而含量减少,逐渐形成了太平洋水域氧的垂直分布最小值。根据氧及有关参数垂直分布比较研究,作者提出了氧最小值成因模式。 Hydrologic thermocline, which is dominated by water temperature, is the basic reason for the formation of the minimum oxygen value. The stratosphere below the maximum vertical gradient of t and σ_t has slow oxygen uptake and biochemical and inorganic oxidation The amount of oxygen, which was originally in balance with the atmosphere, decreased after a long period of deficit expenditure and gradually formed the minimum vertical distribution of oxygen in Pacific waters. According to the comparative study of the vertical distribution of oxygen and related parameters, the authors propose the genesis mode of oxygen minimum.