【摘要】 分析了 2 0 0 0年秋季黄、东海几个典型海区的叶绿素 a调查资料 ,结果表明 :在没有温跃层存在的海区 ,叶绿素 a的垂直分布是均匀的 ,昼夜 (2 4 h)变化的幅度也很小 ,且上、下层不同粒径的浮游植物所含叶绿素 a的比例变化也不大。但在明显存在温跃层的海区中 ,叶绿素 a的垂直变化明显 ,昼夜变化的幅度较大 ,且在温跃层的上、下方显示相反的变化规律 ;不同粒径浮游植物叶绿素 a的比例组成在温跃层上、下方明显不同 ,在温跃层的下方 ,较大粒径 (2～ 2 0μm,>2 0μm)的叶绿素 a所占的比例明显大于其在表层水中所占的比例更多还原

【Abstract】 The observed data of chlorophyll-a in 3 typical sea areas of the Yellow Sea and East China Sea in the autumn of 2000 were analysed, and it is shown from the analysis results that in the sea area without thermocine, the vertical distributions of chlorophyll-a are uniform, its diel variations are small, and the size compositions of phytoplankton chlorophyll-a in the upper layer are similar to those in the lower layer; but in the sea area with prominent thermocline, the vertical variations in chlorophyll-a are significant, its diel variations are great, and its variabilities in the layer above the thermocline are opposite to those in the layer below the thermocline; the size compositions of phytoplankton chlorophyll-a in the layer above the thermocline are different from those in the layer below the thermocline, and the proportion of phytoplankton chlorophyll-a with a grain size of 2 to 20 μm or greater than 20 μm in the latter is appreciably greater than that in the former.更多还原