摘要:
利用美国国家海洋大气管理局2007年发布的全球海域温度数据库资料和美国国家地球物理数据中心2006年发布的海底地形数据库资料,对东海黑潮热核(即高温区)的时空分布进行了分析。结果显示:从表层到250m深,东海黑潮热核的分布区域由表层的靠近中轴线附近逐渐偏向黑潮的东部边缘,分布范围由表层占黑潮流幅的30%以上缩减到250m深度的10%左右,250m以下热核的分布范围和区域再没有明显的变化;从表层到水深200m,从东海黑潮的入口到出口,热核的温度与深度呈下降的趋势,在200m以下呈上升的趋势,2月份上层下降的趋势最明显;热核在台湾东北部和30°N附近进入吐噶喇海峡处均出现明显的转弯点,随着深度的增加热核的转弯点逐渐偏向东南,在台湾东北部200m水深以上热核转弯点分布还存在明显的季节变化。
Abstract:
Using the World Ocean Atlas 2005 for three-dimensional explorations and figure manifestation with Matlab computer program, internal structure of water temperature of the Kuroshio in the East China Sea (ECS) is researched, by analyzing the distribution and change of the 10% high temperature area (warm-core). The results show that, (1) from surface to 250 m depth, the distribution area of warm-core is moving from middle axes of ECS-Kuroshio current to the east border, and the warm-core range is reduc-ing from larger than 30~to about 10%. There is no distinct change in warm-core area below 250 m. (2) From the entrance to the exit of ECS-Kuroshio, the warm core temperature is decreasing with Kuroshio current from the surface to the depth of 200 m, but the temperature is increasing below the depth of 200 m. (3) There are two turn points of warm core of ECS-Kuroshio current; one is off the northeast of Taiwan Island, and the other is near 30°N where ECS-Kuroshio flows into Tokara Strait. The turn points are moving toward southeast with depth. The one off the northeast of Taiwan Island changes gradually in different seasons.
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