本格拉上升流锋时空变化特征研究

发布时间：2018-04-24 05:00

本文选题：本格拉上升流锋 + 锋强度　；参考：《海洋通报》2016年03期

【摘要】：本格拉上升流区域作为大西洋东边界上升流区域,对于区域乃至全球气候均有重要影响;同时上升流区域处于非洲南部与拉丁美洲相近,战略地位重要。海洋锋作为海洋中尺度现象对海汽相互作用、生物多样性,水下声传播等均有较大影响。因此,对本格拉上升流锋时空分布、锋强度季节变化具有较高的科研、经济和军事价值。通过WOA13季节平均数据对上升流锋区三维空间分布特点,锋强度分布季节变化等方面进行了分析。分析结果表明:本格拉上升流锋锋轴线随深度增加逐渐偏离海岸,锋轴线位置随季节改变摆动幅度不大;本格拉上升流锋强度分布具有明显的南北差异,呈现南强北弱的特点,且在浅层温度锋强度有较大季节差异,锋强度垂直方向上最大值位于30~90 m水层内。
[Abstract]:Benguela upwelling region, as an upwelling region along the eastern Atlantic border, has an important influence on regional and even global climate, and the upwelling region is close to that of Latin America in southern Africa, so its strategic position is important. As a mesoscale phenomenon, ocean front has great influence on sea vapor interaction, biodiversity, underwater acoustic propagation and so on. Therefore, the temporal and spatial distribution of the upwelling front in Benguela and the seasonal variation of the intensity of the front are of high scientific, economic and military value. Based on the seasonal average data of WOA13, the characteristics of three-dimensional spatial distribution in upwelling front region and seasonal variation of frontal intensity distribution are analyzed. The results show that the axis of the upwelling front of Benguela gradually deviates from the coast with the increase of depth, and the position of the axis of the upwelling front changes little with the season, and the intensity distribution of the upwelling front of Benguela has obvious difference between the north and the south, showing the characteristics of strong in the south and weak in the north. Moreover, the intensity of the shallow temperature front has a great seasonal difference, and the maximum value in the vertical direction of the front strength lies in the water layer of 30 ~ 90 m.
【作者单位】：海军大连舰艇学院;
【分类号】：P731.2

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