Analysis the characteristics of convergence zone in the east of Luzon Strait based on Argo data

Ruan Hailin; Yang Yanming; Niu Fuqiang; Wen Hongtao

Article Contents

Article Navigation > Haiyang Xuebao > 2015 > 37(7): 78-84

Ruan Hailin, Yang Yanming, Niu Fuqiang, Wen Hongtao. Analysis the characteristics of convergence zone in the east of Luzon Strait based on Argo data[J]. Haiyang Xuebao, 2015, 37(7): 78-84.

Citation:

Ruan Hailin, Yang Yanming, Niu Fuqiang, Wen Hongtao. Analysis the characteristics of convergence zone in the east of Luzon Strait based on Argo data[J]. Haiyang Xuebao, 2015, 37(7): 78-84.

Ruan Hailin, Yang Yanming, Niu Fuqiang, Wen Hongtao. Analysis the characteristics of convergence zone in the east of Luzon Strait based on Argo data[J]. Haiyang Xuebao, 2015, 37(7): 78-84.

Citation:

Ruan Hailin, Yang Yanming, Niu Fuqiang, Wen Hongtao. Analysis the characteristics of convergence zone in the east of Luzon Strait based on Argo data[J]. Haiyang Xuebao, 2015, 37(7): 78-84.

PDF( 3179 KB)

Analysis the characteristics of convergence zone in the east of Luzon Strait based on Argo data

Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China

Received Date: 2014-10-08
Rev Recd Date: 2015-03-15

Abstract

Abstract

Argo data from 2010 to 2013 was used to analyze the convergence zone's features in the east of Luzon strait(19°~23°N,123°~127°E). The results as shows: (1)The acoustic velocity near ocean surface in seasons were ranked from large to small: summer,autumn,spring and winter. The maximum acoustic velocity is 1 543.5 m/s in summer while the minimum is 1 533.4 m/s in winter. The mixed layer depth in seasons were ordered from large to small as followed: winter,autumn,spring and summer. (2)The WOA13 climatological data was used to prolong the sound velocity profiles to seafloor. Analysis the features of sound channel in seasons.The depth and sound velocity of sound channel axis were stabilized. The depth was in 1 000 to 1 040 m,the sound velocity of sound channel axis is 1 482 m/s. The length of sound channel more than 4 500 m in all four seasons,it was beneficial to formed convergence zone. (3)The study area formed convergence zone surely,the probability which is more than 50% accounted for 70.6%. The occurrence probability of convergence zone was seasonal variation significantly,spring and winter is more likely to formed,summer is least. (4)The RAMGeo acoustic forecast model was used to simulate the four seasons' acoustic transmission loss in the east of Luzon strait,obtained the seasonal variation of the convergence zone in the study area. While the source depth is 100 m,the receiver depth is 10 m: the first convergence zone,the distance from sound source is 61 to 64 km,the nearest distance is in summer,while the farther is in spring and winter. The convergence-wide,the maximum is 10 km in summer,while the minimum is 4.6 km in spring. The distribution of convergence-gains is opposite with convergence-wide in seasons,the strongest is 14.6 dB in spring,while the least is 8.5 dB in summer.
- east of Luzon Strait,
- convergence zone,
- sound speed profile,
- seasonal variation,

FullText(HTML)

References(23)

References

Hale F E. Long range sound propagation in the deep ocean[J]. Journal of the Acoustical Society of America,1961,33(4):456-464.

黄建冲,黄企洲.南海东北部海区声速分布特征[J].热带海洋,1986,5(2):67-72. Huang Jianchong,Huang Qizhou. Distributions of acoustic velocity of sea water in northeast South China Sea[J]. Tropic Oceanology,1986,5(2):67-72.

朱伯康,许建平.国际Argo计划执行现状剖析[J].海洋技术,2008,27(4):102-114. Zhu Bokang,Xu Jianping. Analysis of the global Argo project implementation[J]. Ocean Technology,2008,27(4):102-114.

Urick R J.Caustics and convergence zones in deep-water sound transmission[J]. Journal of the Acoustical Society of America,1965,38(2):348-358.

Urick R J,Lund G R. Coherence of convergence zone sound[J]. Journal of the Acoustical Society of America,1967,43(4):723-729.

张仁和.水下声道中的反转点会聚区(I)简正波理论[J].声学学报,1980(1):28-42. Zhang Renhe. Turining-point convergence-zones in underwater sound channel(I) A normal-mode theory[J]. Acta Acustica,1980(1):28-42.

张仁和.水下声道中的反转点会聚区(II)广义射线理论[J].声学学报,1982(2):75-87. Zhang Renhe. Turnning-point convergence-zones in underwater sound channel(II) A generalized ray theory[J].Acta Acustica,1982(2):75-87.

龚敏,肖金泉,王孟新,等.南海深海声道中反转点会聚区的实验研究[J].声学学报,1987,12(6):417-423. Gong Min,Xiao Jinquan,Wang Mengxin,et al. Experimental study of the turnning-point convergence zones in the deep ocean of the South China Sea[J]. Acta Acustica,1987,12(6):417-423.

Guan D H,Zhang R H,Sun Z G,et al. Spatial coherence of sound in convergence zones and shallow zones in the South China[J]. Journal of the Acoustical Society of America,1998,103(5):2856.

张旭,张永刚.声速垂直结构变化引起的汇聚区偏移[J].海洋科学进展,2010,28(3):311-317. Zhang Xu,Zhang Yonggang. Effects of sound-speed profiles on convergence zone shift[J]. Advances in Marine Science,2010,28(3):311-317.

李玉阳,笪良龙,晋朝勃,等. 海洋锋对深海会聚区特征影响研究[J].声学技术,2010,29(6):78-79. Li Yuyang,Da Lianglong,Jin Chaobo,et al. Research on the effects of ocean front on characteristics of convergence zone[J]. Technical Acoustics,2010,29(6):78-79.

张旭,张健雪,张永刚,等.南海西部中尺度暖涡环境下汇聚区声传播效应分析[J].海洋工程,2011,29(2): 83-91. Zhang Xu,Zhang Jianxue,Zhang Yonggang,et al. Effects of acoustic propagation in convergence zone under a warm eddy environment in the western South China Sea[J]. Ocean Engineering,2011,29(2):83-91.

赵申东,宋志杰,赵海彬.穿越深海会聚区的声源定位方法研究[J].应用声学,2004,4:35-39. Zhao Shendong,Song Zhijie,Zhao Haibin. Source localization traversing convergence zones[J]. Journal of Applied Acoustics,2004,4:35-39.

郭李,宋志杰,王良.基于深海会聚区声强匹配处理的声源定位方法[J].声学技术,2012,31(3):277-281. Guo Li,Song Zhijie,Wang Liang. A method of sound localization based on matching the sound intensityin deep-sea convergence zone[J]. Technical Acoustics,2012,31(3):277-281.

刘增宏,许建平,修义瑞,等.参考数据集对Argo剖面浮标盐度观测资料校正的影响[J].海洋预报,2006,23(4):1-12. Liu Zenghong,Xu Jianping,Xiu Yirui,et al. The effect of reference dataset on calibration of Argo profiling float salinity data[J]. Marine Forecasts,2006,23(4):1-12.

冯士筰,李凤岐,李少菁.海洋科学导论[M].北京:高等教育出版社,1999. Feng Shizuo,Li Fengqi,Li Shaojing. An introduction to Marine Science[M]. Beijing: Higher Education Press,1999.

Ocean Climate Laboratory(NODC).World Ocean Atlas 2013 Product Documentation[M].Silver Spring,MD,2013.

Fofonoff P,Millard R C.Algorithms for computation of fundamental properties of seawater[R]. Paris: UNESCO Tech Pap in MAR SCI,1983,44:1-53.

Akima. A new method of interpolation and smooth curve fitting based on local procedures[J]. Journal of the Association for Computing Machinery,1970,17:589-602.

Collins M D. A split-step pade solution for the parabolic equation method[J].Journal of the Acoustical Society of America,1993(4):1736-1742.

王光旭,彭朝晖,王鲁军.宽带RAM模型在对称多处理器集群上的并行设计[J].声学技术,2011,30(3):284-288. Wang Guangxu,Peng Zhaohui,Wang Lujun. Parallel computation of RAM model on SMP cluster[J]. Technical Acoustics,2011,30(3):284-288.

笪良龙.海洋水声环境效应建模与应用[M].北京:科学出版社,2012. Da Lianglong. Modeling and Application of Underwater Acoustic Environmental Effect[M]. Beijing:Science Press,2012.

Hanrahan J J. Predicting Convergence zone formation in the deep ocean[M]//Progress in Underwater Acoustics. New York: Springer-Verlag,1987:361-370.

Relative Articles

Supplements(0)

Cited By

Proportional views