Impacts of Typhoons on Kuroshio Large Meander: Observation Evidences
SUN Liang,YANG Yuan-Jian,FU Yun-Fei
School of Earth and Space Sciences, University of Science and Technology of China, Hefei;LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing,School of Earth and Space Sciences, University of Science and Technology of China, Hefei,School of Earth and Space Sciences, University of Science and Technology of China, Hefei
The formation of the Kuroshio large meander in summer 2004 was investigated by using the cruise data, Argo profiles data, and satellite remote sensing data. We validated the point that cyclonic eddy contributes to the large meander. Besides, the impacts of typhoons on Kuroshio meanders were studied. From 29 July to 4 August, the typhoons stirred the ocean and upwelled the deep water, which enhanced the existed cyclonic eddy, and immediately made a drastic meander of the Kuroshio. Moreover, the unexpected typhoons in June 2004 also contributed to the initial meander at Tokara Strait. The result clearly shows an alternative meander mechanism of Kuroshio path via typhoon-eddy-Kuroshio interactions. It is argued that typhoons accompanied with cyclonic eddies, might play crucial roles in meanders of the Kuroshio. This will provide a more comprehensive understanding of the dynamics of the west boundary flows like the Kuroshio and the Gulf Stream, and will be useful in eddy-resolution models.
Received: 18 October 2008
Revised: 27 November 2008
Accepted: 05 December 2008
Fund:
The National Basic Research Program of China (973 Program)
