The sea surface wind stress and net heat flux affect the seasonal variation of water mass character in the PN section by changing the mixed layer depth every season.
海面风场和净热通量场通过改变混合层的深度影响障碍层深度的季节变化，而海面降水对于季节平均的障碍层分布和变化都没有显著的影响。
The sea surface wind stress and net heat flux in the PN section affect the seasonal variation of the barrier layer depth by changing the mixed layer depth every season.
海面风场和净热通量场通过改变混合层的深度影响障碍层深度的季节变化，而海面降水对于季节平均的障碍层分布和变化都没有显著的影响。
The main conclusions are as follow: 1. The wind stress of sea surface is one dynamical factor of thermocline, which has important effect on intensity and depth of the seasonal thermocline.
主要结果如下：海表风应力是影响温跃层的动力因子，对季节性温跃层的深度和强度均有重大影响，但对大洋温跃层的影响不大；
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