Relationships between the sound speed ratio and physical properties of surface sediments in the South Yellow Sea

Guanbao Li; Jingqiang Wang; Xiangmei Meng; Baohua Liu; Guangming Kan; Guozhong Han; Qingfeng Hua; Yanliang Pei; Lei Sun

doi:10.1007/s13131-021-1764-8

Volume 40 Issue 4

Jun. 2021

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Guanbao Li, Jingqiang Wang, Xiangmei Meng, Baohua Liu, Guangming Kan, Guozhong Han, Qingfeng Hua, Yanliang Pei, Lei Sun. Relationships between the sound speed ratio and physical properties of surface sediments in the South Yellow Sea[J]. Acta Oceanologica Sinica, 2021, 40(4): 65-73. doi: 10.1007/s13131-021-1764-8

Citation:

Guanbao Li, Jingqiang Wang, Xiangmei Meng, Baohua Liu, Guangming Kan, Guozhong Han, Qingfeng Hua, Yanliang Pei, Lei Sun. Relationships between the sound speed ratio and physical properties of surface sediments in the South Yellow Sea[J]. Acta Oceanologica Sinica, 2021, 40(4): 65-73. doi: 10.1007/s13131-021-1764-8

Citation:

Guanbao Li, Jingqiang Wang, Xiangmei Meng, Baohua Liu, Guangming Kan, Guozhong Han, Qingfeng Hua, Yanliang Pei, Lei Sun. Relationships between the sound speed ratio and physical properties of surface sediments in the South Yellow Sea[J]. Acta Oceanologica Sinica, 2021, 40(4): 65-73. doi: 10.1007/s13131-021-1764-8

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Relationships between the sound speed ratio and physical properties of surface sediments in the South Yellow Sea

doi: 10.1007/s13131-021-1764-8

Guanbao Li^{1, 2},
Jingqiang Wang^{1, 2},
Xiangmei Meng^{1, 2},
Baohua Liu^{2, 3
,
,},
Guangming Kan^{1, 2},
Guozhong Han^{1, 2},
Qingfeng Hua^{1, 2},
Yanliang Pei^{1, 2},
Lei Sun^{1, 2}

1.
Key Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
2.
Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
3.
National Deep Sea Center, Ministry of Natural Resources, Qingdao 266237, China

Funds: The National Natural Science Foundation of China under contract Nos 42076082, 41706062 and 41676055; the Director Fund of Pilot National Laboratory for Marine Science and Technology (Qingdao) under contract No. QNLM201713; the Public Science and Technology Research Funds Projects of Ocean under contract No. 201405032; the Taishan Scholar Project Funding under contract No. tspd20161007.

More Information

Corresponding author: E-mail: bhliu@ndsc.org.cn
Received Date: 2020-01-08
Accepted Date: 2020-11-21

Available Online: 2021-05-07

Publish Date: 2021-06-03

Abstract

Abstract

Building empirical equations is an effective way to link the acoustic and physical properties of sediments. These equations play an important role in the prediction of sediments sound speeds required in underwater acoustics. Although many empirical equations coupling acoustic and physical properties have been developed over the past few decades, further confirmation of their applicability by obtaining large amounts of data, especially for equations based on in situ acoustic measurement techniques, is required. A sediment acoustic survey in the South Yellow Sea from 2009 to 2010 revealed statistical relationships between the in situ sound speed and sediment physical properties. To improve the comparability of these relationships with existing empirical equations, the present study calculated the ratio of the in situ sediment sound speed to the bottom seawater sound speed, and established the relationships between the sound speed ratio and the mean grain size, density and porosity of the sediment. The sound speed of seawater at in situ measurement stations was calculated using a perennially averaged seawater sound speed map by an interpolation method. Moreover, empirical relations between the index of impedance and the sound speed and the physical properties were established. The results confirmed that the existing empirical equations between the in situ sound speed ratio and the density and porosity have general suitability for application. This study also considered that a multiple-parameter equation coupling the sound speed ratio to both the porosity and the mean grain size may be more useful for predicting the sound speed than an equation coupling the sound speed ratio to the mean grain size.
- sound speed ratio,
- index of impedance,
- physical properties,
- surface sediment,
- in situ measurement,
- South Yellow Sea

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References(31)

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