A spectral mixture model analysis of the Kuroshio variability and the water exchange between the Kuroshio and the East China Sea |
| |
| Authors: | Jim Song Huijie Xue Xianwen Bao Dexing Wu Fei Chai Lei Shi Zhigang Yao Yongzhi Wang Feng Nan Kai Wan |
| |
| Institution: | (1) Faculty of Fisheries, Kagoshima University, Kagoshima, 890-0056, Japan;(2) Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA, 02543, U.S.A |
| |
| 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. |
| |
| Keywords: | |
| 本文献已被 CNKI 万方数据 SpringerLink 等数据库收录！ |
|
