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Geographic Variations of Sound Chann...

Acharya, Mukunda .

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Geographic Variations of Sound Channel Axis in the Global Ocean.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Geographic Variations of Sound Channel Axis in the Global Ocean./
Author:	Acharya, Mukunda .
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
Description:	82 p.
Notes:	Source: Masters Abstracts International, Volume: 81-03.
Contained By:	Masters Abstracts International81-03.
Subject:	Physics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13858681
ISBN:	9781085617635

Geographic Variations of Sound Channel Axis in the Global Ocean.
Acharya, Mukunda .

Geographic Variations of Sound Channel Axis in the Global Ocean. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 82 p.

Source: Masters Abstracts International, Volume: 81-03.

Thesis (M.S.)--The University of Mississippi, 2019.

This item must not be sold to any third party vendors.

Sound signals are used for imaging and communication in the ocean. Underwater sound speed has a minimum at a certain depth that forms a sound channel for long-range underwater sound propagation. The geographic variation of sound channel is crucial in uses of underwater sound in various environments including ocean acoustic tomography and monitoring of global warming. In this work, sound speed and depth of the channel axis in the global ocean are characterized for their variation with the latitude, longitude, and depth.About 16,000 sound speed profiles are calculated from Conductivity, Temperature and Pressure (CTD) data collected in the World Ocean Circulation Experiment and used to characterize the features of the channel axis. It is found that the Indian Ocean in the north tropical region and the North Atlantic Ocean in the subtropical region have the deeper sound axis and larger axial sound speed than the other oceans. Practical formulas for the dependence of the axial sound speed and depth on latitude are given from polynomial fits for individual oceans and the global ocean.

ISBN: 9781085617635Subjects--Topical Terms:

516296
Physics.
Subjects--Index Terms:

Sound channel

Geographic Variations of Sound Channel Axis in the Global Ocean.
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245 1 0 $a Geographic Variations of Sound Channel Axis in the Global Ocean.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2019
300 $a 82 p.
500 $a Source: Masters Abstracts International, Volume: 81-03.
500 $a Advisor: Zhang, Likun.
502 $a Thesis (M.S.)--The University of Mississippi, 2019.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a Sound signals are used for imaging and communication in the ocean. Underwater sound speed has a minimum at a certain depth that forms a sound channel for long-range underwater sound propagation. The geographic variation of sound channel is crucial in uses of underwater sound in various environments including ocean acoustic tomography and monitoring of global warming. In this work, sound speed and depth of the channel axis in the global ocean are characterized for their variation with the latitude, longitude, and depth.About 16,000 sound speed profiles are calculated from Conductivity, Temperature and Pressure (CTD) data collected in the World Ocean Circulation Experiment and used to characterize the features of the channel axis. It is found that the Indian Ocean in the north tropical region and the North Atlantic Ocean in the subtropical region have the deeper sound axis and larger axial sound speed than the other oceans. Practical formulas for the dependence of the axial sound speed and depth on latitude are given from polynomial fits for individual oceans and the global ocean.
590 $a School code: 0131.
650 4 $a Physics. $3 516296
650 4 $a Acoustics. $3 879105
650 4 $a Physical oceanography. $3 3168433
653 $a Sound channel
653 $a Sound speed profiles
653 $a Underwater acoustics
653 $a World Ocean Circulation Experiment
690 $a 0605
690 $a 0986
690 $a 0415
710 2 $a The University of Mississippi. $b Physics. $3 3192828
773 0 $t Masters Abstracts International $g 81-03.
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791 $a M.S.
792 $a 2019
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13858681