| 摘要: |
| 本文根据CSK和JMA的1302个观测站次的实测资料1),对九州和琉球群岛以西，水深大于200米的东海黑潮区域内的水团进行分析。
研究海区的最大水深约2719米。1000米等深线仅在冲绳岛和宫古岛之间海峡折入太平洋,说明该海峡是研究海区和太平洋深层水交换的重要通道。1500米等深线在研究海区的南部呈现封闭曲线,反映出该海区水深大于1500米的深层水具有一定的“弧立性”。
须田皖次(1930,1931,1938)、宇田道隆(1930,1941)、安井善一(1932)、肥沼宽一(1938)、辻田時美(1950)、永井正男(1952)、赤松英雄(1952)、山野省三(1952)、加藤威夫(1957,1959)、毛汉礼等(1964)、A.M. Xapqehko(1968)、二谷颖男(1972)、西田英男等(1978)、佐原勉等(1979)和其他海洋学家都对研究海区的水团进行过一些研究,但都没有进行比较完整的分析。 |
| 关键词: 黑潮水团 东海 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院海洋研究所调查研究报告第667号 |
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| A PRELIMINARY INVESTIGATION OF THE KUROSHIO WATERMASS IN THE EAST CHINA SEA |
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Yang Tianhong
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Institute of Oceanology, Academia Sinica
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| Abstract: |
| According to the shape of T-S curves, the Kuroshio Watermass of the East China Sea in the region studied in the summer time can be divided into four layers, i.e. four watermasses: (1)the Kuroshio Surface Water, (2)the Kuroshio High-salinity Water,(3) the Subarctic Intermediate Water, and(4)the Okinawa Trough Deep Water,However, in winter, only three watermasses exist, that is to say, the Kuroshio Surface Water is absent.
The Kuroshio Surface Water is a mixed water of the Continental Water and the Kuroshio High-salinity Water. It is situated on the west side of the Kuroshio High-Salinity Water. It starts to appear in the region studied in May, most powerful in August, and disappears from this region after November. The maximum thickness is generally less than 75 meters in summer.
The Kuroshio High-Salinity Water is the core of the Kuroshio Watermass. it consists mainly of the North Subtropical Water, with a salinity ranging about 34.50-35.02%. This watermass is situated above the 500 metre level. There is a High-Salinity core in this layer, the salinity of which being higher than that of the water upper and lower layers. The depth of the core is generally about 150-200 metres;however in winter, in the north and west of this region the core is sometimes located at sea surface.
The main body of the Subarctic Inter mediate Water is the North Pacific Intermediate Water formed in the Subarctic region. The upper and lower boundaries of this watermass are situated at depths about 400-500 and 900-1000 metres respectively. There is a core of low-salinity of about 34.32% in the water.
The Okinawa Trough Deep Water originates in the North Pacific Ocean where it is located between 1000 and 1200 metres, but below 1200 metres in this region. |
| Key words: THE KUROSHIO WATERMASS EAST CHINA SEA |
