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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.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Geographic Variations of Sound Channel Axis in the Global Ocean./
作者:	Acharya, Mukunda .
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	82 p.
附註:	Source: Masters Abstracts International, Volume: 81-03.
Contained By:	Masters Abstracts International81-03.
標題:	Physics. -
電子資源:	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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500 $a Source: Masters Abstracts International, Volume: 81-03.
500 $a Advisor: Zhang, Likun.
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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.
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650 4 $a Acoustics. $3 879105
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653 $a Sound speed profiles
653 $a Underwater acoustics
653 $a World Ocean Circulation Experiment
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690 $a 0415
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