Home Journals Articles Updates About
CN
image
收藏切换
Effects of a subsurface abnormal anticyclonic eddy on sound propagation in the northwest continental slope of the South China Sea
收藏切换
PDF
Feihong Zeng1, Lingling Xie1, 2, 3, *, Kaiming Wu4, Qiang Li1, 2, 3, Mingming Li1, 2, 3, Simeng Liu1
Haiyang Xuebao | 2024, 46(8) : 19 - 36
Less
收藏切换
Haiyang Xuebao | 2024, 46(8): 19-36
• Article •
Effects of a subsurface abnormal anticyclonic eddy on sound propagation in the northwest continental slope of the South China Sea
Full
Feihong Zeng1, Lingling Xie1, 2, 3, *, Kaiming Wu4, Qiang Li1, 2, 3, Mingming Li1, 2, 3, Simeng Liu1
Affiliations
  • 1. Laboratory of Coastal Ocean Variation and Disaster Prediction, College of Oceanology and Meteorology, Guangdong Ocean University, Zhanjiang 524088, China
  • 2. Key Laboratory of Climate, Resources and Environment in Continental Shelf Sea and Deep Ocean, Zhanjiang 524088, China
  • 3. Key Laboratory of Space Ocean Remote Sensing and Application, Ministry of Natural Resources, Zhanjiang 524088, China
  • 4. National Key Laboratory of Science and Technology on Underwater Acoustic Antagonizing, Zhanjiang 524022, China
Published: 2024-08-31 doi: 10.12284/hyxb2024083
Outline
收藏切换

Using temperature-salinity profiles and current measurements, satellite data and reanalysis data in April 2018, this study analyses the acoustic field characteristics and effects of an abnormal anticyclonic eddy (AAE) on acoustic propagation on the continental slope area in the northwestern South China Sea (SCS). The results show that the AAE has a lens-shaped structure with a surface cold core, a shallower mixed layer, and subsurface intensified velocities. Unlike the concave sound-speed contours in the normal anticyclonic eddy (NAE), the sound-speed distribution in the abnormal anticyclonic eddy (AAE) exhibits a lens-shaped structure with an upward convexity and downward concavity. The surface sound speed within the eddy is lower than that outside, showing a negative anomaly (<−2 m/s). Conversely, the sound speed in the subsurface layer of the eddy is higher than that outside, showing a positive anomaly (>11 m/s). This results in the thickness of the original double thermocline extending up and down by a total of 47 meters in the presence of the eddy. As the sound propagates from the eddy outside on the shelf to the deep sea, the surface sound channel disappears as the propagation distances decreasing in the AAE, contrast to the increased distance in the NAE. As the sound propagates from the eddy outside in the deep ocean to the shelf, the location of the sound energy convergence zone moves backward and downward in the AAE, with the maximum distance exceeding 24 km and 0.3 km, respectively. This is similar to the situation in the NAE. As the sound propagates from the eddy core to outside in the deep sea, the turning depth of the sound deepens and the distance between the sound energy convergence zones doubles in the AAE, while no changes in the NAE.

abnormal anticyclonic eddy  /  underwater sound propagation  /  convergence zone  /  northwest continental slope of the South China Sea
Feihong Zeng, Lingling Xie, Kaiming Wu, Qiang Li, Mingming Li, Simeng Liu. Effects of a subsurface abnormal anticyclonic eddy on sound propagation in the northwest continental slope of the South China Sea[J]. Haiyang Xuebao, 2024 , 46 (8) : 19 -36 . DOI: 10.12284/hyxb2024083
Appendix
Less
Year 2024 volume 46 Issue 8
PDF
236
108
Cite this Article
BibTeX
Article Info
doi: 10.12284/hyxb2024083
  • Receive Date：2024-03-07
  • Online Date：2025-11-26
  • Published：2024-08-31
Article Data
Affiliations
History
  • Received：2024-03-07
  • Revised：2024-06-26
Funding
Affiliations
    1. Laboratory of Coastal Ocean Variation and Disaster Prediction, College of Oceanology and Meteorology, Guangdong Ocean University, Zhanjiang 524088, China
    2. Key Laboratory of Climate, Resources and Environment in Continental Shelf Sea and Deep Ocean, Zhanjiang 524088, China
    3. Key Laboratory of Space Ocean Remote Sensing and Application, Ministry of Natural Resources, Zhanjiang 524088, China
    4. National Key Laboratory of Science and Technology on Underwater Acoustic Antagonizing, Zhanjiang 524022, China
References
Share
https://castjournals.cast.org.cn/joweb/hyxb/EN/10.12284/hyxb2024083
Share to
QR

Scan QR to access full text

Cite this article
BibTeX
Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
关闭全屏
  • BibTeX
  • EndNote
  • RefWorks
  • TxT
Links
Articles
Latest Articles
Most Read
Collections
Updates
Events
News
Multimedia
About
About Us
Contact
No. 86 Xueyuan South Road, Haidian District, Beijing
100081
010-62199257
qkjq@cast.org.cn

Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House