The Japan Sea Intermediate Water; Its Characteristics and Circulation
The Japan Sea Intermediate Water; Its Characteristics and Circulation
复制标题
日本海中层水；
DOI：
10.1023/a:1007825609622
复制
发表时间：
1999
影响因子：
2.3
通讯作者：
T. Senjyu
中科院分区：
文献类型：
--
作者：
T. Senjyu
在日本海南部，对马海流水和日本海本体水之间存在一个盐度最低层。由于盐度最低值对应于北太平洋中层水，因此被命名为日本海中层水（JIW）。为了研究JIW的来源和环流，在1969年获得的水文资料的基础上，研究了全流域的盐度最小值分布。年轻的JIW位于133°E以西的日本海西南部，氧浓度最高，盐度最低，而另一个低氧高盐的JIW位于日本海东南部的副极锋以南。由于年轻的JIW显示出高氧浓度、高温和低密度，水的来源可能在表层。最可能的俯冲区是132°E以西的亚北极锋，在那里氧含量最高，盐度最低，盐度最低。此外，属性分布表明，JIW有两个流动路径：一个东向流沿着亚北极锋和向南流到郁陵岛盆地。另一方面，与JIW不同的盐度最低值占据了亚北极锋以北的北方日本海，其显示出明显高于JIW的盐度和高氧浓度。然而，这个盐度最低被认为不是一个水团，而是上覆和下伏水团之间的边界。
In the southern Japan Sea there is a salinity minimum layer between the Tsushima Current Water and the Japan Sea Proper Water. Since the salinity minimum corresponds to the North Pacific Intermediate Water, it is named the Japan Sea Intermediate Water (JIW). To examine the source and circulation of JIW, the basin-wide salinity minimum distribution was investigated on the basis of hydrographic data obtained in 1969. The young JIW, showing the highest oxygen concentration and the lowest salinity, is seen in the southwestern Japan Sea west of 133°E, while another JIW with lower oxygen and higher salinity occupies the southeastern Japan Sea south of the subpolar front. Since the young JIW shows high oxygen concentrations, high temperatures and low densities, the source of the water is probably in the surface layer. It is inferred that the most probable region of subduction is the subarctic front west of 132°E with the highest oxygen and the lowest salinity at shallow salinity minimum. In addition, property distributions suggest that JIW takes two flow paths: a eastward flow along the subarctic front and an southward flow toward the Ulleung Basin. On the other hand, a different salinity minimum from JIW occupies the northern Japan Sea north of the subarctic front, which shows an apparently higher salinity and high oxygen concentration than JIW. However, this salinity minimum is considered not to be a water mass but to be a boundary between overlying and underlying water masses.