A spectral mixture model analysis of the Kuroshio variability and the water exchange between the Kuroshio and the East China Sea

Jim Song; Huijie Xue; Xianwen Bao; Dexing Wu; Fei Chai; Lei Shi; Zhigang Yao; Yongzhi Wang; Feng Nan; Kai Wan

doi:10.1007/s00343-011-0114-7

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A spectral mixture model analysis of the Kuroshio variability and the water exchange between the Kuroshio and the East China Sea

Updated：2023-05-16

- A spectral mixture model analysis of the Kuroshio variability and the water exchange between the Kuroshio and the East China Sea
- Journal of Oceanology and Limnology Vol. 29, Issue 2, Pages: 446-459(2011)
- Affiliations：
  
  1. Physical Oceanography Laboratory Ocean University of China
  2. School of Marine Sciences University of Maine
  3. National Marine Data and Information Service
  4. The First Institute of Oceanography SOA
- Author bio：
- Funds：
- DOI：10.1007/s00343-011-0114-7
  CLC：
- Online First：02 March 2011，
  
  Published：2011
- Accepted：
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Song, J., Xue, H., Bao, X. et al. A spectral mixture model analysis of the Kuroshio variability and the water exchange between the Kuroshio and the East China Sea., Chin. J. Ocean. Limnol. 29, 446–459 (2011). https://doi.org/10.1007/s00343-011-0114-7
DOI：

Song, J., Xue, H., Bao, X. et al. A spectral mixture model analysis of the Kuroshio variability and the water exchange between the Kuroshio and the East China Sea., Chin. J. Ocean. Limnol. 29, 446–459 (2011). https://doi.org/10.1007/s00343-011-0114-7 DOI：

摘要

Abstract

For understanding more about the water exchange between the Kuroshio and the East China Sea

We studied the variability of the Kuroshio in the East China Sea (ECS) in the period of 1991 to 2008 using a three-dimensional circulation model

and calculated Kuroshio onshore volume transport in the ECS at the minimum of 0.48 Sv (1 Sv ≡ 106 m3/s) in summer and the maximum of 1.69 Sv in winter. Based on the data of WOA05 and NCEP

The modeled result indicates that the Kuroshio transport east of Taiwan Island decreased since 2000. Lateral movements tended to be stronger at two ends of the Kuroshio in the ECS than that of the middle segment. In addition

we applied a spectral mixture model (SMM) to determine the exchange zone between the Kuroshio and the shelf water of the ECS. The result reveals a significantly negative correlation (coefficient of −0.78) between the area of exchange zone and the Kuroshio onshore transport at 200 m isobath in the ECS. This conclusion brings a new view for the water exchange between the Kuroshio and the East China Sea. Additional to annual and semi-annual signals

intra-seasonal signal of probably the Pacific origin may trigger the events of Kuroshio intrusion and exchange in the ECS.

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Keywords

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