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利用NOAA卫星AVHRR传感器反演的MCSST图像 ,分析了台湾东北海域冷涡的季节变化。结果表明 :( 1 )台湾东北海域冷涡终年存在 ,出现在彭佳屿附近海域、台湾岛北部沿岸海域和东岸北部沿岸海域 3处 ,夏、秋季有 3涡或双涡并存现象。 ( 2 )彭佳屿附近海域冷涡 ,最早出现于 3月底 ,最迟发生于 1 1月中 ,冬季消失 ,表层形态、尺度、位置和强度有明显的季节性变化。 ( 3)冷涡的季节性变化可能与黑潮锋面弯曲的摆动和台湾海峡水入侵东海陆架间的动力平衡有关。
Based on the MCSST image retrieved by the NOAA satellite AVHRR sensor, the seasonal variation of cold vortex in northeastern Taiwan was analyzed. The results show that: (1) The cold vortex in northeastern Taiwan has a long history of existence, occurring in the waters around Peng Jiayu Island, the northern coast of Taiwan Island and the coast of northern coast of East China Sea. There are three or two vortex coexisting phenomena in summer and autumn. (2) The cold vortex in the waters near Peng Jiayu appeared first at the end of March, the latest occurs in mid-January, and disappears in winter. The surface morphology, scale, location and intensity have obvious seasonal changes. (3) The seasonal variation of cold vortex may be related to the dynamic balance between the frontal bending of the Kuroshio and the dynamic balance between the Taiwan Strait water and the East China Sea shelf.