A numerical experiment on ocean circulations forced by seasonal winds in Suruga Bay
A numerical experiment on ocean circulations forced by seasonal winds in Suruga Bay
复制标题
骏河湾季风强制海洋环流的数值实验
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
T. Komatsu
中科院分区：
文献类型：
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作者：
Kiyoshi Tanaka;Y. Michida;T. Komatsu
利用实测风场资料和数值海洋模式，研究了骏河湾风场季节变化对水循环的影响。在1月（冬季）和4月（春季），逆时针方向的涡度从大气供应到海湾口周围的海洋，而顺时针方向的涡度在7月（夏季）和10月（秋季）供应。与风场的变化相对应，1月和4月湾口附近海面产生逆时针环流，7月和10月湾口附近海面产生顺时针环流。此外，在该环流以北还产生一至两个弱环流。这些环流是准地转的，受陆地和洋底地形的强烈影响，但没有黑潮的影响。除秋季外，准停滞区和辐合区往往出现在海湾东部的表层。有一种可能性是，风驱动的环流可能会发挥重要作用，在运输的漂浮物，如海草，从海湾内和周围的海湾东部，在那里大量的海草已被观察到的海面和海底。
We investigate influence of the seasonal variation in the wind field on water circulation in Suruga Bay by using a wind data set and a numerical ocean model. Counterclockwise vorticity is supplied around the bay mouth from the atmosphere into the ocean in January (winter) and April (spring), whereas clockwise vorticity is supplied in July (summer) and October (autumn). Corresponding to the change in the wind field, a counterclockwise circulation is generated at the sea surface around the bay mouth in January and April, whereas a clockwise circulation in July and October. Moreover, one or two weak circulations are generated to the north of the circulation. These circulations, which are quasi-geostrophic and strongly influenced by land and ocean bottom topography, are generated without effect of the Kuroshio current. Quasi-stagnant and convergent regions tend to appear in the surface layer in the eastern part of the bay, except for autumn. There is a possibility that the wind-driven circulations may play an important role in transport of floating materials, such as seagrass, from in and around the bay to the eastern part of the bay, where a large amount of seagrass has been observed both on the sea surface and floor.