基于WOA13数据的海区位置对北大西洋声波导影响分析
Analysis on the Influence of Sea Area Location Data on Acoustic Waveguide in North Atlantic Based on WOA13 Data
  
DOI:
中文关键词:  北大西洋  声波导  WOA13  BELLHOP
英文关键词:North Atlantic Ocean  acoustic waveguide  WOA13  BELLHOP
基金项目:
作者单位
曹震卿13,张永刚1,张 旭2,刘振龙3 1.海军大连舰艇学院2.中国人民解放军91550部队3.中国人民解放军92993部队 
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中文摘要:
      应用WOA13季节平均数据和BELLHOP模型,在季节、声源频率等因素确定的情况下,分10m表面声源和250m水下声源,分析北大西洋冬季东、西部海区的声波导情况。在给出不同海区位置的声速场和声波导具体信息的基础上,研究其规律:最小声速值和声道轴深度由直布罗陀海峡向外递减扩散,表层声速值和声速梯度由南向北递减,声跃层存在于低纬度海区,混合层在低纬度通常在100m以内,在高纬度增加至100m以上。10m深度表面声源的汇聚区反转深度随纬度增加逐渐减少,西部海区深于东部海区;西部海区的汇聚区跨度大于东部海区,东西部跨度最大值出现在25°N和15°N,传播损失基本一致。250m水下声源的汇聚区反转深度浅于10m深度表面声源时,同样是西部海区大于东部海区,汇聚区跨度呈低-高-低规律,东西部跨度最大值出现在35°N和25°N;东部海区25°N以南、西部海区15°N以南,不同接收深度上的传播损失差异较大,以北差异较小。同时简要叙述了声影区对目标探测的影响。
英文摘要:
      Based on the seasonal average data of WOA13 and the BELLHOP model, this paper analyzes the acoustic waveguide in the eastern and western parts of North Atlantic Ocean respectively in winter by dividing the surface sound source of 10 m and underwater sound source of 250 m, in the case of fixed seasonal, sound source frequency and other factors. This paper aims to derive the laws based on the given information of sound speed field and acoustic waveguide of different sea areas: The minimum sound speed and axial sound channel in the Gibraltar Strait diminish outward and spread and diffuse, with the surface sound speed and speed velocity gradient descending from the south to north. The sound speed thermocline exists in low latitude areas, the mixed layer is usually within 100 m in low latitudes, and increases to more than 100 m in high latitudes. The inversion depth of convergence zone for 10 m surface sound source gradually decreases with the increase of latitude, and the western sea areas is deeper than the eastern area. The convergence zone span of western sea areas is greater than eastern, with the maximum span of eastern at 25 °N, and western at 15 °N, and transmission losses being basically identical. The inversion depth of convergence zone for 250 m underwater sound source is shallower than the depth for 10 m surface sound source. Besides, the value in western sea areas is greater than that in the eastern. The span of convergence zone shows a law of low-high-low tendency with changing latitudes, with the maximum span of eastern at 35 °N, and western at 25 °N. The transmission losses in different receiving depths have been greater in the southern areas of 25 °N of eastern areas and 15 °N of western areas, and the losses in northern areas are negligible. In addition, this paper also briefly expounds the influence of acoustic shadow zone on target detection.
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