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Thursday, August 6, 2020 | History

2 edition of Ambient noise and surface wave dissipation in the ocean found in the catalog.

Ambient noise and surface wave dissipation in the ocean

Francis Camomot Felizardo

Ambient noise and surface wave dissipation in the ocean

by Francis Camomot Felizardo

  • 24 Want to read
  • 19 Currently reading

Published by Woods Hole Oceanographic Institution and Massachusetts Institute of Technology in [Woods Hole, Mass .
Written in English

    Subjects:
  • Ocean waves -- Measurement.,
  • Underwater acoustics.,
  • Noise.

  • Edition Notes

    Statementby Francis C. Felizardo.
    SeriesWHOI -- 93-40., WHOI (Series) -- 93-40.
    ContributionsWoods Hole Oceanographic Institution.
    The Physical Object
    Pagination219 p. :
    Number of Pages219
    ID Numbers
    Open LibraryOL17645186M

    Ambient noise cross-correlation observations of fundamental and higher-mode Rayleigh wave propagation governed by basement resonance Martha K. Savage,1 Fan-Chi Lin,2 and John Townend1 Received 9 May ; revised 14 June ; accepted 17 June Cited by: 2 Underwater ambient noise What is ambient noise Ambient noise is that sound received by an omni-directional sensor which is not from the sensor itself or the manner in which it is mounted. Noise from the sensor or its mounting is termed self-noise. Ambient noise is made up of contributions from many sources, both natural and Size: KB.

    Head waves in ocean acoustic ambient noise: Measurements and modeling either active sour11 or ocean ambient noise. A comparison peaks are due to the surface wave noise exciting head waves that reradiate into the water column at the seabed critical angle (10). For the data in Fig. 1, the averaging time for theFile Size: 2MB. Ambient Seismic Noise Surface Wave Tomography Various Instructors. This course will provide the basis for Ambient Seismic Noise Surface Wave Tomography. It will include seismic noise virtual Green’s functions reconstruction, surface wave dispersion curves measurements and inversion for a 3D S-wave velocity model.

    The Surface Wave Instrument Float with Tracking (SWIFT) is a free drifting system to measure waves, winds, turbulence, and ambient noise at the ocean surface. A key feature is the ability to move with the wave motion, thereby maintaining a near-surface range and filtering the wave orbital velocities. Introduction. The climate of the Antarctic Peninsula is changing in the Southern Hemisphere, with a few degrees Celsius rise in both atmospheric and surface ocean temperatures over the last few decades [1–3].Associated with this ongoing warming is a cycle of ice sheet and iceberg breakup and grounding that is accompanied by the release of acoustic energy into the Southern by:


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Ambient noise and surface wave dissipation in the ocean by Francis Camomot Felizardo Download PDF EPUB FB2

While numerous field measurements have shown a strong correlation between the ambient noise spectrum level (N) in the range Hz to 25 kHz and wind speed in the ocean, very little has been done to establish a comparable correlation between the ambient noise spectrum level and surface wave field by: 2.

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, Cited by: 2. While numerous field measurements have shown a strong correlation between the ambient noise spectrum level (N) in the range Hz to 25 kHz and wind speed in the ocean, very little has been done to establish a comparable correlation between the ambient noise spectrum level and surface wave field by: 2.

Finally, this book provides a series of appendices giving in-depth mathematical treatments. With its complete and careful discussions of both theory and experimental results, this book will be of the greatest interest to graduate students and active researchers working in fields related to ambient noise in the by: Download Citation | Ambient noise and surface wave dissipation in the ocean / | Thesis (Ph.

D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, Includes. The results suggest that wave parameters related to the incidence of wave breaking correlated well with the ambient noise level.

The correlation between N and the rms wave amplitude a was found to he poor but that between N and the rms amplitude of the local wind sea a w was comparable to that between wind speed U and by: Ambient noise and surface wave dissipation in the ocean.

By Francis Camomot Felizardo. Abstract. by Francis C. (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, Includes bibliographical references (leaves )Author: Francis Camomot Felizardo. Rayleigh‐wave phase‐velocity maps and three‐dimensional images of shear velocity (Vs), generated from ambient noise and earthquake surface waves, show that west of MSH the middle‐lower crust is anomalously fast ( ± km/s), overlying an anomalously slow uppermost mantle (– km/s).

This combination renders the forearc Moho Author: Kayla J. Crosbie, Geoffrey A. Abers, Michael Everett Mann, Helen A. Janiszewski, Kenneth C. Creager. Cross-correlation of 1 month of ambient seismic noise recorded at USArray stations in California yields hundreds of short-period surface-wave group-speed measurements on interstation paths.

We used these measurements to construct tomographic images of the principal geological units of California, with low-speed anomalies corresponding to the main sedimentary basins and high-speed Cited by: High-Resolution Surface-Wave Tomography from Ambient Seismic Noise Article (PDF Available) in Science () April with 1, Reads How we measure 'reads'.

Ice-generated ambient noise is the dominant mechanism contributing to the general character of ambient noise in the Arctic Ocean from a few tenths of Hz up to 10 Hz. Episodic noise is also present in the form of seismic events, such as earthquakes along the Mid Arctic Ridge (Figure 1), biologics (mostly marine mammals in the marginal ice zones), and man-made noise from ice.

Finally, this book provides a series of appendices giving in-depth mathematical treatments. With its complete and careful discussions of both theory and experimental results, this book will be of the greatest interest to graduate students and active researchers working in fields related to ambient noise in the ocean.

tists from the field, this book covers a range of topics including ambient noise observations, generation models of their physical origins, numerical modeling, and processing methods. An experiment that measured the NSL between 2 to 25 kHz, the wind speed U, and the directional wave spectrum was conducted off the coast of Oregon to examine the correlation between the ambient noise spectrum level (NSL) and surface wave parameters.

These measurements show that although the correlation between the ambient NSL and the rms wave height is poor, the NSL and wave height Author: Francis C.

Felizardo, W. Kendall Melville. ambient noise [2, 3] established the main components of ambient noise as (a) sea surface noise: the noise of wind and wave action at the surface, usually referred to as wind-dependent noise, and rain noise; (b) biological noise, the noise of fish, whales and invertebrates; and (c) traffic noise, the noise.

Lithospheric Structure of the Northern Ordos From Ambient Noise and Teleseismic Surface Wave Tomography Shilin Li Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, ChinaCited by: 2.

Ambient noise is the residual noise background measured at a hydrophone when individual noise sources cannot be identified, or ambient noise is the natural noise environment at a measurement site. Noise is unwanted sound in the ocean, since it generally interferes with the operation of sonar or other underwater sound registration equipment.

SPP short course FU Berlin [email protected] 25 Surface waves are best suited to get the volume averaged shear-velocity structure. Data from ambient noise helps to constrain shallow (crustal) structures.

Sensitivity kernels explain how well the medium can be resolved. The resolution of surface-wave models decreases with depth. The resolution changes also considerably with the. The ambient noise was used to create Love wave dispersion curves between sensor pairs, which were in turn inverted to estimate the shear wave velocity of the dam wall as a function of depth.

The velocity profile indicated the phreatic surface roughly 10 m below the surface, with regions near the centre of the array showing the phreatic surface Cited by: 1.

Ambient noise and wave breaking on a sandy beach: energy dissipation estimates Two five minute intervals of sound spectra and surface elevation from the full time series are presented in Figure 3. The ambient noise spectra (Figure 3b) are dominated by discrete noise events associated with peaks in surface elevation (Figure 3a).

Time. The authors present, for the first time in book form, a self-contained and unified account of correlation-based and ambient noise imaging. In order to facilitate understanding of the core material, they also address a number of related topics in conventional sensor array imaging, wave propagation in random media, and high-frequency asymptotics Cited by: sound.

Ambient noise in the ocean is the sound field against which signals must be detected. In the ambient noise field, it is often difficult to ascribe a particular sound to a localized source.

The character of ambient noise results both from the characteristics of the multitude of contributing sound sources and the ability of sound to.Brekhovskikh, L.M., Generation of Sound Waves ina Liquid by Surface Waves, Soviet Physics, Acoustics 12(3),– Google Scholar Browning, D.G., et al., Vertical Directionality of Low Frequency Ambient Noise in the South FijiBasin, Journal of the Acoustical Society of America 70(S1), S66a (alsoNUSC TDJan.

) Google ScholarCited by: