Sound-speed Distribution in the Western Indian Ocean PDF Download
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Author: J. G. Colborn
Publisher:
ISBN:
Category : Indian Ocean
Languages : en
Pages : 176
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Book Description
Initial results of a continuing study to analyze and summarize the acoustically significant characteristics of the vertical sound-speed structure in the Indian Ocean are presented for purposes of acoustic model inputs and future exercise planning in the region. Data displays cover the western Indian Ocean west of 75 degrees E and north of 20 degrees S. Hydrocast data with computed sound speeds at standard depths provide the basic information to define areas of the Indian Ocean that are reasonably homogeneous with regard to sound-speed properties and can be summarized by a single profile for each season. Seasonal data presentations of bottom conjugate depth (the shallow conjugate of the bottom sound speed) and depth excess (water depth below the deep conjugate of the near-surface sound-speed maximum) indicate the primarily bottom-limited situation in the western Indian Ocean and identify the restricted areas of the Somali Basin with convergence-zone propagation potential. The upper-layer characteristics of layer depth, in-layer gradient, and below-layer gradient are displayed seasonally in contour format based on sound-speed-converted BT and XBT temperature data. Emphasis is placed on the significant effects of the seasonal monsoons, and in particular the strong SW Monsoon, on the near-surface structure. Results based on the two data sources are presented separately and some comparisons are made.
Author: J. G. Colborn
Publisher:
ISBN:
Category : Indian Ocean
Languages : en
Pages : 176
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Book Description
Initial results of a continuing study to analyze and summarize the acoustically significant characteristics of the vertical sound-speed structure in the Indian Ocean are presented for purposes of acoustic model inputs and future exercise planning in the region. Data displays cover the western Indian Ocean west of 75 degrees E and north of 20 degrees S. Hydrocast data with computed sound speeds at standard depths provide the basic information to define areas of the Indian Ocean that are reasonably homogeneous with regard to sound-speed properties and can be summarized by a single profile for each season. Seasonal data presentations of bottom conjugate depth (the shallow conjugate of the bottom sound speed) and depth excess (water depth below the deep conjugate of the near-surface sound-speed maximum) indicate the primarily bottom-limited situation in the western Indian Ocean and identify the restricted areas of the Somali Basin with convergence-zone propagation potential. The upper-layer characteristics of layer depth, in-layer gradient, and below-layer gradient are displayed seasonally in contour format based on sound-speed-converted BT and XBT temperature data. Emphasis is placed on the significant effects of the seasonal monsoons, and in particular the strong SW Monsoon, on the near-surface structure. Results based on the two data sources are presented separately and some comparisons are made.
Author: Don F. Fenner
Publisher:
ISBN:
Category : Indian Ocean
Languages : en
Pages : 118
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Book Description
Author: Don F. Fenner
Publisher:
ISBN:
Category :
Languages : en
Pages : 47
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Book Description
The sound speed structure of the western South Atlantic Ocean is far more variable than that found in the North Atlantic or North Indian Oceans, largely due to hemispheric position and a wide variety of surface, near-surface, intermediate depth, and near-bottom water masses. In the South Atlantic, summer is defined as January-March and winter as July-September. The wide variety of temperature and salinity variability throughout the western South Atlantic leads to entirely differently shaped sound speed profiles and entirely different values of the depth of the deep sound channel axis and critical depth. These differences undoubtedly have significant effects on acoustic propagation. This report examines western South Atlantic sound speed variability along three cross-sections for both summer and winter, relates variability in sound speed structures to surface currents, the Antarctic Intermediate Water, Mediterrannean Intermediate Water, and Antarctic Bottom Water core flows west of the Mid-Atlantic Ridge, and defines the number of observations deeper than the depth of the deep sound channel axis during both summer and winter for the entire South Atlantic Ocean between the Equator and 45 S latitude. (Author).
Author: NAVAL OCEANOGRAPHIC OFFICE WASHINGTON D C.
Publisher:
ISBN:
Category :
Languages : en
Pages : 17
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Book Description
Describes a mathematical model of sound velocity for the Indian Ocean that can predict sound velocity at depths between 200 and 2450m within 2 m/sec RMS. It is used in computer generation of acoustic province charts. (Author).
Author:
Publisher:
ISBN:
Category : Music
Languages : en
Pages : 1334
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Book Description
Author: Scripps Institution of Oceanography. Library
Publisher:
ISBN:
Category : Marine biology
Languages : en
Pages : 980
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 228
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Book Description
This catalog of unclassified official Naval Oceanographic Office publications issued through 1983 contains a short explanatory abstract for each listing.
Author: L. S. Bark
Publisher: Elsevier
ISBN: 1483164950
Category : Science
Languages : en
Pages : 218
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Book Description
Tables of the Velocity of Sound in Sea Water contains tables of the velocity of sound in sea water computed on a "Strela-3" high-speed electronic computer and a T-5 tabulator at the Computational Center of the Academy of Sciences. Knowledge of the precise velocity of sound in sea water is of great importance when investigating sound propagations in the ocean and when solving practical problems involving the use of hydro-acoustic devices. This book demonstrates the computations made for the velocity of sound in sea water, which can be found in two ways: by direct measurement with the aid of suitable equipment, and by calculation from formula expressing the dependence of the velocity on the temperature and salinity of the water. This book will be of great value to researchers and students.
Author: Environmental Science Information Center. Library and Information Services Division
Publisher:
ISBN:
Category :
Languages : en
Pages : 444
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Book Description
Author: Environmental Science Information Center. Library and Information Services Division
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 438
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Book Description