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本文中的浅海区域系指黄、东海这两个海域中的陆架部分,这是世界上最大的陆架之一.浅海区域的地形,在南-北方向上呈狭长状,约跨18个纬度(22°-40°N).等深线主要呈南-北走向.水文特征的分布深受这一海底地形的影响,特别是在冬季.冬季海水温度(自海面直至垂直均匀层底)的分布型式与等深线的趋于一致,即反映了这一效应.长江口位于本海区的西岸.长江是世界上最大的河流之一,它注入东海的年迳流量约达9.25×10~(11)立方米.强大的西边界流黑潮及其分支和延伸部分位于本海区以东.虽然,黑潮主流没有直接流入陆架,但通过黑潮与陆架沿岸水的混合,以及黑潮分支和延伸部分的流入陆架海域,黑潮对黄、东海浅海区域水文情况的影响很大并且持久.可以说,如果没有黑潮,黄、东海浅海区域的水文情况将与现在的大不相同.
The shallow sea area in this paper refers to the shelf part of the two sea areas, the Yellow Sea and the East China Sea, which is one of the largest shelves in the world.The topography of the shallow sea area is long and narrow in the south-north direction, spanning about 18 latitudes (22 ° -40 ° N). The isobath is mainly in the south-north direction.The distribution of hydrologic features is strongly influenced by this submarine topography, especially in winter.The distribution of the winter sea temperature (from the sea surface to the vertical uniform layer) Which is consistent with the isobath, which reflects this effect.The Yangtze Estuary is located in the west bank of this sea area.The Yangtze River is one of the largest rivers in the world, and its annual flow into the East China Sea is about 9.25 × 10 ~ (11) Cubic meters.The strong western boundary current Kuroshio and its branches and extensions are located east of the area.Although the mainstream Kuroshio did not directly flow into the shelf, through the mixture of Kuroshio and continental shelf water, and the Kuroshio branch and extension The Kuroshio had a great and lasting impact on the hydrological conditions in the Yellow Sea and the East China Sea shallow sea areas.It can be said that without the Kuroshio, the hydrological conditions in the shallow sea area of the East China Sea and the Yellow Sea will be greatly different from those in the present.