北太平洋西边界流的低频变化特征  

On low-frequency variations of volume transport of the Pacific western boundary currents

作　　者：蔡榕硕[1] 齐庆华[1] 张启龙[2] 

机构地区：[1]国家海洋局第三海洋研究所,国家海洋局海洋-大气化学与全球变化重点实验室,福建厦门361005 [2]中国科学院海洋研究所,中国科学院海洋环流与波动重点实验室,山东青岛266071

出　　处：《海洋学报》2013年第1期9-14,共6页

基　　金：国家重点基础研究发展计划项目(2009CB421404);我国近海海洋综合调查与评价(908专项)(908-02-01-02);公益性行业科研专项经费项目(GYHY201005019;GYHY201006021);卫星海洋环境动力学国家重点实验室开放研究基金(SOED0601)

摘　　要：基于日本气象厅长时间序列的温、盐度再分析资料,利用动力计算方法分析了北太平洋西边界的北赤道流及其下游黑潮和棉兰老流流量的年际和年代际变化,并探讨了北赤道流变化的可能原因。结果表明,北赤道流和黑潮具有比较一致的年际和年代际变化,均在1976年前后发生了一次气候跃变,之后有长期偏强的趋势,而棉兰老流的年际和年代际变化则有所不同。特别是,北赤道流1976年之后增加的流量似乎大多进入黑潮,而流入棉兰老流的流量则减少。进一步的分析还表明,西传的Rossby波和棉兰老冷涡的变动可能对北赤道流的年际变化有重要影响。The volume transports of the North Equatorial Current （NEC）,the Kuroshio （KC）,and the Mindanao Current （MC） along the Pacific western boundary were investigated through traditional dynamical method by using long-time and high-resolution data set. The results show that the volume transports of the NEC and KC exhibited similar distinct inter-annual and inter-decadal variations. Both of them experienced a climate jump in 1976 and bear obvious intensifying trends after 1976. In contrast,the transport fluxes of the MC transport is different from that of the NEC and KC. It seems that the increased volume of the NEC mostly flows into the KC rather than the MC af- ter 1976. The correlation analysis suggests that inter-annual variations of the NEC transport may be also greatly influenced by Rossby Wave and Mindanao cyclonic eddy.

关 键 词：北赤道流 黑潮 棉兰老流 流量 年际和年代际变化 

分 类 号：P722[天文地球—海洋科学] P731.21