摘要
调查海区位于南海海盆中部和西沙—中沙群岛周围海域。南海地处热带季风区:冬夏分别为东北和西南季风期。南海中氧含量各层平面分布及其变化趋势是:表层冬春呈北高南低:夏秋呈均匀分布,从表层至深层(1000m)高氧层随深度增加向西北方向位移;夏秋呈北高南低。氧含量在垂直方向上具有相同的变化模式(特别是200m以深):表层氧含量较高,最大值除冬季出现在表层外,一般都在30～75m^(?)层(此层叶绿素a数量最多)。在200m层附近出现氧逆转现象。700m处出现氧最小值。深层海水具有大洋水的性质。
The survey on dissolved oxygen was carried out over the central basin of the South China, Sea, off the Xisha and Zhongsha Islands, where tropics monsoon prevails, from northeast in winter and from southwest in summer. Of seasonal and horizontal distributions, oxygen content in surface layer is higher in the north than the south in spring and winter, but uniform in summer and autumn. Between surface and bottom (1000m) there is a high-oxygen-layer in spring and winter, inclining to northwest as depth increases; while in summer and autumn, oxygen content is higher in the north than the south. The vertical profile of oxygen content reveals that in surface layer it is higher, with maxima appearing generally between 30-75 meters (where the amount of chlorophyll a is maximum reaches maximum) but at 0 in layer in winter. In spring and summer, oxygen content below 75m decrease rapidly and oxocline layer is formed; in autumn and winter, distribution of oxygen is uniform, but there is an obvious anomaly near 200m. Minimum oxygen content appears near 700m. The properties of deep sea water in the central basin are the same as ocean water.
出处
《海洋通报》
CAS
CSCD
北大核心
1990年第3期29-36,共8页
Marine Science Bulletin
