文章摘要
李骏,林巨,冯海泓.台风“莫兰蒂”对声传播特性的影响研究[J].声学技术,2016,35(6):504~511
台风“莫兰蒂”对声传播特性的影响研究
Effects of typhoon ‘Meranti’ on acoustic propagation characteristics
投稿时间:2016-03-12  修订日期:2016-06-20
DOI:10.16300/j.cnki.1000-3630.2016.06.004
中文关键词: 台风"莫兰蒂"  温盐变化  声传播特性
英文关键词: typhoon "Meranti"  changes of temperature and salinity  acoustic propagation characteristics
基金项目:
作者单位E-mail
李骏 中国科学院声学研究所东海研究站, 上海 200032
中国科学院大学, 北京 100190 
sdwflijun@126.com 
林巨 中国海洋大学, 山东青岛 266100  
冯海泓 中国科学院声学研究所东海研究站, 上海 200032  
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中文摘要:
      利用吕宋海峡附近海区温盐数据的数值模型进行声传播模拟计算的方法,根据相应的声速剖面及声传播损失,分析台风对声传播特性的影响。结果显示,2010年第10号台风“莫兰蒂”过境时,海洋环境对台风的响应较为迅速,海洋表层的温度和盐度变化剧烈,而声速及传播损失的变化较温度盐度缓慢。分析表明:台风过境会导致表面声速减小,深海声道最小声速增大,声传播损失增大,深海声道原第一会聚区位置最小声能损失增大5 dB,台风过境导致声线第一反折点位置下移,第一会聚区消失,使声传播距离缩短。
英文摘要:
      By means of the acoustic propagation simulation via the numerical model of temperature and salinity data in the sea area near Luzon Strait, this paper studies how typhoon influences the characteristics of acoustic propagation based on the corresponding variation in sound velocity and sound propagation loss. It is indicated that when the 2010 No.10 typhoon ‘Meranti’ transits, the marine environment is rapidly destabilized to cause the temperature and salinity in sea surface layer changing drastically, but not so for the sound velocity and propagation loss. Analyses show that Typhoon makes the surface sound velocity reduced and the minimum sound velocity in deep ocean channel increased with sound propagation loss increasing, and typically the sound propagation loss along the original first convergence zone in deep ocean channel climbed by 5dB. Meanwhile, the first reflection position of sound ray moves down after typhoon, and then the first convergence zone will disappear so that the sound propagation distance will shorten.
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