太平洋不同海水层结条件下的内波波致声场起伏研究

李佳讯; 张韧; 金宝刚; 陈奕德

doi:10.3969/j.issn.0253-4193.2013.03.009

太平洋不同海水层结条件下的内波波致声场起伏研究

doi: 10.3969/j.issn.0253-4193.2013.03.009

1.
解放军理工大学气象海洋学院, 江苏南京 211101
2.
北京应用气象研究所, 北京 100029

基金项目: 国家自然科学基金项目(41276088)。

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出版历程
- 收稿日期: 2010-06-04
- 修回日期: 2011-04-14

Sound fluctuation caused by the internal wave under different stratified conditions in the Pacific

1.
College of Meteorology and Oceanography, PLA University of Sciecne and Technology, Nanjing 211101, China
2.
Beijing Institue of Applied Meteorology, Beijing 100029, China

摘要

摘要: 基于Argo资料对太平洋海域海水层结进行分类区划,利用内波动力学方法对内波致声起伏进行数值求解,对不同层结状况下的内波致声起伏进行模拟试验。结果表明:垂直方向海水层结的不均匀和跃层的存在,使海洋内波斜压模态受到了歪曲变形。层结峰的个数和深度与声速起伏存在很好的对应关系。有内波的声传播特征总体上与没有内波时的相似。不同层结情况下,声场对内波扰动的响应不一致。
- 内波 /
- 海水层结 /
- 声起伏 /
- Argo资料
Abstract: The stratified conditions of seawater in the Pacific were analyzed and classified based on Argo data. Using internal wave dynamics method, the numerical value of the sound fluctuation caused by the internal wave was solved,and the sound fluctuations in different stratified conditions of seawater were simulated and analyzed. The results show that the vertical mode shape is distorted because of the nonhomogeneous density of seawater and the existence of the pycnocline,and the distortion corresponds to the intensity of pycnocline. And the number and the depths of stratification apexes have good corresponding relationships with the sound fluctuations. In general, sound transmission characteristics with internal wave are similar to the transmission characteristics without internal wave. However, acoustic field responses to the disturbance of internal wave under different stratified conditions are diverse.
- internal wave /
- stratification of seawater /
- sound fluctuation /
- Argo data

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参考文献(14)

Lee O S, Batzler W E. Fixed path acoustic transmission in the presence of internal waves[J]. J Acoust Soc Am, 1960, 32(11): 1514-1514.

沈国光, 叶春生. 海洋内波对水声场的扰动[J]. 海洋工程, 2002, 20(2): 78-84.

Lynch J F, Jin G L, Pawlowicz R, et al. Acoustic travel-time perturbations due to shallow-water internal waves and internal tides in the Barents Sea Polar Front: Theory and experiment[J]. J Acoust Soc Am, 1996, 99(2): 803-821.

Finette S, Orr M H, Turgut A, et al. Acoustic field variability induced by time evolving internal wave fields[J]. J Acoust Soc Am, 2000, 108(3): 957-972.

蒋德军,高天赋,张云鹏, 等. 典型浅海温跃层内波对声场起伏的影响[J]. 声学学报,1997,22(3): 198-208.

张云鹏,高天赋,蒋德军. 内陆湖中声传输起伏[J]. 声学学报,1997,22(2): 116-122.

陈奕德. Argo资料的应用研究. 南京:解放军理工大学, 2006.

Tielburger D, Finette S, Wolf S. Acoustic propagation through a internal wave field in a shallow water waveguide[J]. J Acoust Soc Am, 1997, 101(2): 789-808.

叶春生,沈国光. 内波垂向结构的分段求解方法[J]. 天津大学学报, 2004, 37(12): 1041-1045.

胡涛,高天赋. 浅海内波垂直模式方程的一种解析解[J]. 海洋学报,2007, 29(4): 148-151.

Evans R. Calculation of internal wave eigen-frequencies and modes:Displacement and sound speed realizations[C]. New London, 2000.

Garrett C, Munk W. Space-time scales of internal waves[J]. Geophys Astrophys Fluid Dyn, 1972, 3(1): 225-264.

Garrett C, Munk W. Space-time scales of internal waves: A progress report[J]. J Geophys Res, 1975, 80(3): 291-297.

Badiey M, Mu Y, Lynch J, et al. Temporal and azimuthal dependence of sound propagation in shallow water with internal waves[J]. IEEE J Oceanic Eng, 2002, 27(1): 117-129.

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