Journal of Oceanology and Limnology

, Volume 36, Issue 1, pp 77–91 | Cite as

Spatiotemporal variations of the surface Kuroshio east of Taiwan Island derived from satellite altimetry data

  • Jifeng Qi (齐继峰)
  • Baoshu Yin (尹宝树)
  • Zhenhua Xu (徐振华)
  • Delei Li (李德磊)
Article
  • 62 Downloads

Abstract

Spatiotemporal variation of the surface Kuroshio east of Taiwan Island is investigated by quantitatively analyzing 23-year (1993–2015) sea surface Absolute Dynamic Topography data. The annual mean state of the Kuroshio is shown, with a flow width ~136 km and surface transport ~7.75×104m2/s. The corresponding standard deviations of these are 28 km and 2.14×104m2/s. Results of power spectrum analysis indicate that the primary periods of Kuroshio surface transport east of Taiwan Island are 1 and 2.8 years, respectively. Spatially, the Kuroshio surface transport southeast of Taiwan Island has greater variability than that to its northeast. That transport showed strong seasonality, with a maximum 8.8×104m2/s in summer and minimum 7.5×10 4 m 2 /s in winter, which was mainly caused by local monsoon winds. A linear long-term upward trend of Kuroshio surface transport during 1993–2015 was found, during which the mean, southeast, and northeast of the Kuroshio east of Taiwan Island increased by 0.30×10 4, 0.22×10 4 and 0.36×10 4 m 2 /s, respectively. Correlation and composite analysis show that the Philippines-Taiwan Oscillation (PTO) is important in the interannual variability of the Kuroshio. PTO-induced relative intensity of anticyclonic and cyclonic eddies is the dominant influence on the interannual variability of the Kuroshio east of Taiwan Island.

Keywords

Kuroshio east of Taiwan Island seasonal and interannual variation Philippines-Taiwan Oscillation (PTO) mesoscale eddy 

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Copyright information

© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Jifeng Qi (齐继峰)
    • 1
  • Baoshu Yin (尹宝树)
    • 1
    • 2
  • Zhenhua Xu (徐振华)
    • 1
  • Delei Li (李德磊)
    • 1
  1. 1.Key Laboratory of Ocean Circulation and Waves, Institute of OceanologyChinese Academy of Sciences and Qingdao National Laboratory for Marine Science and TechnologyQingdaoChina
  2. 2.University of Chinese Academy of SciencesBeijingChina

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