Acoustic scattering from a stochastic sea surface

1974 ◽  
Vol 55 (2) ◽  
pp. 247-253 ◽  
Author(s):  
Louis L. Scharf ◽  
Robert L. Swarts
Keyword(s):  
Acoustic Scattering ◽  
Sea Surface

scholarly journals Sound Scattering Layers Within and Beyond the Seychelles-Chagos Thermocline Ridge in the Southwest Indian Ocean

2021 ◽  
Vol 8 ◽  
Author(s):  
Myounghee Kang ◽  
Jung-Hoon Kang ◽  
Minju Kim ◽  
SungHyun Nam ◽  
Yeon Choi ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Unique Feature ◽  
Acoustic Scattering ◽  
Sea Surface ◽  
Distribution Dynamics ◽  
Sound Scattering ◽  
Southwest Indian Ocean ◽  
Environmental Properties ◽  
Distinct Features ◽  
Global Oceans

In global oceans, ubiquitous and persistent sound scattering layers (SL) are frequently detected with echosounders. The southwest Indian Ocean has a unique feature, a region of significant upwelling known as the Seychelles-Chagos Thermocline Ridge (SCTR), which affects sea surface temperature and marine ecosystems. Despite their importance, sound SL within and beyond the SCTR are poorly understood. This study aimed to compare the characteristics of the sound SL within and beyond the SCTR in connection with environmental properties, and dominant zooplankton. To this end, the region north of the 12°S latitude in the survey area was defined as SCTR, and the region south of 12°S was defined as non-SCTR. The results indicated contrasting oceanographic properties based on the depth layers between SCTR and non-SCTR regions. Distribution dynamics of the sound SL differed between the two regions. In particular, the diel vertical migration pattern, acoustic scattering values, metrics, and positional properties of acoustic scatterers showed two distinct features. In addition, the density of zooplankton sampled was higher in SCTR than in the non-SCTR region. This is the first study to present bioacoustic and hydrographic water properties within and beyond the SCTR in the southwest Indian Ocean.

Probability distribution of acoustic scattering from slightly rough sea surface

2016 ◽  
Vol 112 ◽  
pp. 134-144 ◽  
Author(s):  
Mohammad Reza Mousavi ◽  
Mahmood Karimi ◽  
Azizollah Jamshidi
Keyword(s):  
Probability Distribution ◽  
Acoustic Scattering ◽  
Sea Surface ◽  
Rough Sea Surface ◽  
Rough Sea

Acoustic scattering from the sea surface

1984 ◽  
Vol 76 (S1) ◽  
pp. S55-S55
Author(s):  
Paul D. Koenigs ◽  
Joseph M. Monti ◽  
Bernd Nuetzel ◽  
Heinz Herwig
Keyword(s):  
Acoustic Scattering ◽  
Sea Surface

A further investigation of acoustic scattering from the sea surface

1986 ◽  
Vol 79 (S1) ◽  
pp. S68-S68 ◽  
Author(s):  
Bernd Nuetzel ◽  
Heinz Herwig ◽  
Joseph M. Monti ◽  
Paul D. Koenigs
Keyword(s):  
Acoustic Scattering ◽  
Sea Surface
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