庆良间水道的水交换对东海黑潮水团特性的影响

发布时间：2018-03-23 20:00

  本文选题：庆良间水道　切入点：黑潮　出处：《海洋与湖沼》2017年04期

【摘要】：庆良间水道水交换对其上下游东海黑潮的流量和水团特性的变异都起到了非常重要的作用,本文通过将历史观测的WOD资料插值为1/8°×1/8°的网格化数据,估算了庆良间水道的地转流通量特征,然后结合Argo浮标数据讨论了庆良间水道的水交换对东海黑潮水团特性的影响,研究结果表明:(1)西太平洋通过庆良间水道流入东海冲绳海槽主要发生在水道的次表层,并且次表层的入侵可能跟庆良间水道东部的琉球流有关;(2)庆良间水道上下游黑潮的水团特性由于受到来自庆良间水道的动力混合作用导致其存在差异。黑潮次表层高盐水到达冲绳附近之后盐度略微增加,深度略微变浅,然而黑潮中层低盐水的盐度显著减小,深度明显加深;(3)庆良间水道上下游东海黑潮的次表层高盐水和中层低盐水其盐度的季节变化规律不一致。次表层高盐水盐度的季节变化可能同时受到庆良间水道的流量和表层淡水通量的影响,在冬季最强,夏季最弱,然而中层低盐水盐度的季节变化主要受庆良间水道流量的影响,在秋季最强,夏季最弱。
[Abstract]:The water exchange between Qingliang waterways plays a very important role in the variation of Kuroshio discharge and water mass characteristics in the upper and lower East China Sea. In this paper, the historical WOD data are interpolated to 1 / 8 掳脳 1 / 8 掳grid data. The geostrophic flux characteristics of Qingliang Interchannel are estimated, and the effects of water exchange on the characteristics of Kuroshio water masses in the East China Sea are discussed with Argo buoy data. The results show that the western Pacific Ocean flows into the Okinawa trough of the East China Sea through the Qingliang Intermediate Channel, mainly in the subsurface layer of the channel. The intrusion of subsurface layer may be related to the Ryukyu current in the eastern part of Qingliang Interchannel.) the characteristics of Kuroshio water masses in upper and lower reaches of Qingliang Interchannel are different due to the dynamic mixing from Qingliang Interwaterway. The salinity of the layer of high salt water increased slightly when it reached the vicinity of Okinawa. The depth was slightly shallower, but the salinity of the low brine in the middle of the Kuroshio decreased significantly, The seasonal variation of the salinity of the upper and lower Kuroshio of the East China Sea in the upper and lower reaches of the Qingliang Interchannel is not consistent with that of the middle and low brines. The seasonal variation of the high salinity of the upper and lower subsurface brines may also be affected by the seasonal variation of the Qingliang Intermediate Waterway. The effects of flow and surface freshwater fluxes, In winter and summer, however, the seasonal variation of low salt water salinity is mainly affected by the flow of Qingliang Interchannel, which is the strongest in autumn and the weakest in summer.
【作者单位】： 中国科学院海洋研究所;中国科学院大学;
【基金】：国家自然科学基金委员会-山东省人民政府联合资助海洋科学研究中心项目,U1406401号 创新研究群体科学基金项目,41421005号 全球变化和海气相互作用专项项目,GASI-IPOVAI-01-06号
【分类号】：P731.27
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本文编号：1654956