| 黑潮延续体温盐锋的时空变化特征及其声场的初步分析 |
| Analysis on the Characteristics of the Spatial and Temporal Variation of the Kuroshio Extension Front and the Distribution of the Sound Field |
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| DOI： |
| 中文关键词: 黑潮延续体海洋锋 WOA13 季节变化 BELLHOP |
| 英文关键词:Kuroshio Extension front WOA13 database seasonal variation BELLHOP |
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| 中文摘要: |
| 通过对WOA13多年（1955—2012年）季节平均数据的分析，利用绝对梯度最大值连线的方法，得到日本东海岸黑潮延续体温盐锋轴的空间信息，对锋轴线上的锋强度的季节变化特征进行了分析，并利用BELLHOP模型初步讨论了锋区内的声场特点。认为黑潮延续体锋轴线的位置随深度增加逐渐南移，其温盐强度随季节随深度都有明显变化，1-3月份混合层现象明显，此时水下声道受到声源深度的影响明显。 |
| 英文摘要: |
| Through the analysis on the seasonal mean data of WOA13 from 1955 to 2012, this paper uses the absolute gradient maximum connection method to obtain the spatial information of the Kuroshio Extension frontal axis off the east coast of Japan. The seasonal variations of the front axial temperature, salinity and strength are analyzed, and the sound field features in the frontal zone are preliminarily discussed using the BELLHOP model. It is concluded that the Kuroshio Extension frontal axis gradually moves southward with increasing depth, and the temperature and salinity vary significantly with the change of depths and seasons, with obvious mixed layer occurring from January to March when the underwater sound channel is remarkably affected by the sound source depth. |
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