吕宋海峡水交换季节和年际变化特征的数值模拟研究

发布时间：2018-02-01 19:49

本文关键词： 吕宋海峡黑潮水交换数值模拟　出处：《海洋学报》2016年05期 　论文类型：期刊论文

【摘要】：利用ROMS(Regional Ocean Modeling System)建立了一套覆盖西北太平洋的涡尺度分辨率环流模型,并对吕宋海峡附近的环流进行了模拟研究。结果表明,吕宋海峡120.75°E断面净流量季节变化显著,全年均为西向输运,6月份达到最小,为0.40×106 m3/s,然后逐渐增大,在12月份达到最大,为6.14×106 m3/s,全年平均流量为3.04×106 m3/s。在500m以浅,秋、冬季都有明显的黑潮流套存在,并伴有黑潮分支入侵南海,而春、夏季黑潮南海分支减弱或消失,黑潮入侵不明显。在500m以深,冬、春季,吕宋海峡以东有非常明显的南向流存在,流速约10cm/s,而到了夏、秋季该南向流出现明显的减弱,黑潮与南海的水交换主要通过吕宋海峡以北的吕宋海沟进行。在垂向结构上,120.75°E断面浅层呈多流核结构,并且流核的位置和强弱受黑潮的季节性变化影响显著,深层流的季节变化不大。在年际尺度方面,吕宋海峡年际体积输运量异常与Ni錺o3.4滞后6个月相关系数达到41.6%,吕宋海峡水交换与ENSO现象有较为显著的正相关关系,并存在2~3a和准8a周期的年际变化。
[Abstract]:Using ROMS(Regional Ocean Modeling system, a set of Vortex Resolution Circulation models covering the Northwest Pacific Ocean are established, and the circulation near Luzon Strait is simulated. The results show that the seasonal variation of net flux in the Luzon Strait section 120.75 掳E is significant. The annual westward transport reached the minimum of 0.40 脳 106m3 / s in June, and then gradually increased. In December, it reached its maximum of 6.14 脳 106m3s, and the annual average flow rate was 3.04 脳 106m3s. At 500m, there were obvious Kuroshio belts in the light, autumn and winter. The Kuroshio branch invaded the South China Sea, but the Kuroshio branch weakened or disappeared in spring and summer, but the Kuroshio intrusion was not obvious. At 500 m deep, in winter and spring, there is a very obvious southward current east of the Luzon Strait, the velocity of which is about 10 cm / s, but in summer, The water exchange between the Kuroshio and the South China Sea is mainly carried out through the Luzon trench north of the Luzon Strait in autumn. Moreover, the location and intensity of the core are significantly affected by the seasonal variation of the Kuroshio, but the seasonal variation of the deep current is not obvious. The interannual volume transport anomaly of Luzon Strait has a 6-month lag coefficient of 41.6 with NiO3.4, and the water exchange in Luzon Strait has a significant positive correlation with ENSO phenomenon, and there are interannual variations of 2a 3a and quasi 8a cycles.
【作者单位】：国家海洋环境预报中心;国家海洋局海洋灾害预报技术研究重点实验室;
【基金】：国家重点基础研究发展计划项目(2011CB403606) 中国科学院战略性先导科技专项(XDA1102010403) 海洋公益性行业科研专项(201205018) 国家自然科学基金(41222038,41206023)
【分类号】：P731.26
【正文快照】： 1引言吕宋海峡是联系太平洋与南海的主要通道,在太平洋强西边界流——黑潮的流动过程中,流经吕宋海峡东部时伴随着黑潮水对南海的入侵,这通常被称为吕宋海峡输运。黑潮沿着菲律宾东岸向北流动经过吕宋海峡时,有个分支沿着西北方向进入南海。黑潮水主要通过巴林塘海峡进入南海,

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