黄海和东海海域溶解氧的分布特征

Distribution feature of dissolved oxygen in Yellow Sea and East China Sea

根据黄海和东海海区四个季度的调查资料 ,描述了溶解氧的时空分布和变化规律。黄、东海溶解氧分布的基本特征是北高南低 ,西高东低 ,随着水温的变化 ,不同季节这一差别有所不同。黄、东海溶解氧平均值分别为 495 .4和 42 0 .3μmol/L ,测定范围分别为 90 .2～ 6 81.9和 133.9～ 6 92 .8μmol/L。以长江口以东H断面为例 ,描述了夏季溶解氧的断面分布特征 ,在 2 0～ 30m水层出现一氧跃层 ,30m以下垂直分布比较均匀。

Based on the data from the field survey of four seasons in the Yellow Sea and East China Sea, descriptions of the temporal and spacial distribution and changing law of dissolved oxygen (DO) were made. The general feature of the distribution of DO was lower in the southern area than in the northern and higher in the western than in the eastern. The DO means in the Yellow Sea and East China Sea were 495.4 and 420.3 μmol/L, respectively, and the determination ranged 90.2～681.9 and 133.9～692.8 μmol/L. The description of DO vertical distribution in H section was done in summer with H section in the east of Yangtze estuary as an example. A layer DO occured at 20～30 m, and the vertical distribution was even below 30 m. The studies on the distribution feature and changing law of DO in Black stream in the shelf area were deeply done.