亜熱帯前線域の中規模渦活動量の経年変動および黒潮大蛇行発生への影響

The Kuroshio off Enshunada, south of Japan Main Island, is well known to take two major paths, the nearshore path and the large meander path. The Kuroshio changed its path from the nearshore to the large meander during July 2004 (KLM04). The 9.25 MHz high frequency ocean radar developed by the National Institute of Communication and Technology observed a significant increase of the Kuroshio surface transport northeast of Taiwan, which is considered to induce KLM04, after the anticyclonic eddies from the subtropical fronts region collided with the Kuroshio east of Taiwan during August-September 2003. Interannual variability of mesoscale eddy activity at the subtropical fronts region was detected from altimeter data and the anticyclonic eddies which induced the Kuroshio increase were generated during the high eddy activity period, inevitably.