| 摘要: |
| 本文基于日本气象厅1956—2005年间在东海PN断面获得的观测资料, 结合NCEP风场资料, 研究了东海黑潮流量的年际和年代际变化特征, 并探讨了西北太平洋风场和太平洋年代际振荡(PDO)对黑潮流量年际和年代际变化的影响。结果表明, 东海黑潮流量基本服从正态分布, 主要集中在19—33Sv范围内, 其多年平均值为24.30Sv(1Sv=106 m3/s); 季平均、冬、夏季黑潮流量都存在着显著的年际和年代际变化。东海黑潮流量输送具有长期的线性增强趋势, 在1956—2005年间它们分别增加了8.73Sv、9.86Sv和9.38Sv。相关与合成分析结果表明, 黑潮源区和东海黑潮流域上空的经向风异常是黑潮流量年际变化的重要影响因素, 而PDO则对黑潮流量的年代际变化有重要作用。 |
| 关键词: 东海 黑潮 经向风 年际变化 年代际变化 |
| DOI：10.11693/hyhz20140100025 |
| 分类号: |
| 基金项目:中科院创新项目, KZCX2-EW-209 号; 中科院先导专项A 项目, XDA11020104 号, XDA11020305 号; 全球变化和海气相互作用(专项国际合作项目), GASI-03-01-01-02 号 |
|
| THE INTER-ANNUAL AND INTER-DECADAL VARIABILITY OF THE KUROSHIO VOLUME TRANSPORT IN THE EAST CHINA SEA |
|
qijifeng,yinbaoshu,yangdezhou and xuzhenhua
|
|
Institute of Oceanology, Chinese Academy of Science, Qingdao,Institute of Oceanology, Chinese Academy of Science, Qingdao,Institute of Oceanology, Chinese Academy of Science, Qingdao,Institute of Oceanology, Chinese Academy of Science, Qingdao
|
| Abstract: |
| Based on long-time temperature and salinity data of 1956 to 2005 along the PN section provided by Japan Meteorological Agency and the reanalysis wind data by National Centers for Environmental Prediction (NCEP), the inter-annual and inter-decadal variability characteristics of the Kuroshio volume transport (KVT) in the East China Sea are analyzed. In addition, the influences of the northwest Pacific wind and Pacific Decadal Oscillation (PDO) on the KVT are discussed. The results show that the frequency distribution of KVT is in nearly a normal distribution pattern in range of 19—33Sv. The multi-year seasonal average of the KVT through the PN section is 24.30Sv. All the seasonal mean, winter, and summer KVTs show significant inter-annual and inter-decadal variations. A linear long-term upward trend of the KVT in 1956—2005 was revealed during which the seasonal mean, winter, and summer volume transports increased by 8.72, 9.86, and 9.38Sv, respectively. Correlation and composite analysis showed that meridional wind anomalies over the source area of Kuroshio and the Kuroshio area in the East China Sea were responsible for the inter-annual variability in the KVT. Additionally, the inter-decadal variability of the KVT is closely associated with the PDO. |
| Key words: East China Sea Kuroshio meridional wind inter-annual variation interdecadal variation |
