Most of the researches of selectivity of fishing gear ignored the between-haul Variation which is caused by uncontrolled factors such as the depth of water, direction and velocity of wind and current.
传统渔具选择性研究大多忽略了非可控因素(如水深、风流等)造成的网次间差异。
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。
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