Last edited by Vudal
Tuesday, December 1, 2020 | History

1 edition of Observation and inversion of seismo-acoustic waves in a complex arctic ice environment found in the catalog.

Observation and inversion of seismo-acoustic waves in a complex arctic ice environment

Bruce Edward Miller

Observation and inversion of seismo-acoustic waves in a complex arctic ice environment

  • 339 Want to read
  • 37 Currently reading

Published .
Written in English

    Subjects:
  • Hydrophone,
  • Geophone

  • About the Edition

    The propagation of low frequency seismo-acoustic waves in the Arctic Ocean ice canopy is examined through the analysis of hydrophone and geophone data sets collected in 1987 at an ice camp designated PRUDEX in the Beaufort Sea. Study of the geophone time series generated by under-ice explosive detonations reveals not only the expected longitudinal and flexural waves in the ice plate, but also an unexpected horizontally-polarized transverse (SH) wave arriving at a higher amplitude than the other wave types. The travel paths of all three observed wave types are found to be refracted in the horizontal plane along a line coincident with a known ridge separating the ice canopy locally into two distinct half-plates, the first of thin first year ice and the second of thicker multi-year ice. The origin of the SH wave appears to be near the detonation and not associated with the interaction of longitudinal, flexural or waterborne waves with the ridge line. The need to determine the exact location of each detonation from the received time series highlights the dramatic superiority of geophones over hydrophones in this application, as does the ability to detect the anomalous SH waves and the refracted ray paths, neither of which are visible in the hydrophone data. Inversion of the geophone data sets for the low frequency elastic parameters of the ice is conducted initially by treating the ice as a single homogeneous isotropic plate to demonstrate the power of SAFARI numerical modeling in this application. A modified stationary phase approach is then used to extend SAFARI modeling to invert the data sets for the elastic parameters of the tow ice half-plates simultaneously. The compressional/shear bulk wave speeds estimated in the half-plates, 3500/1750 m/s in the multi-year ice and 3000/1590 m/s in the new ice, are comparable to previously obtained values; however, the compressional/shear attenuation values in the tow half-plates, 1.0/2.99 dB/[Lamda] and 1.0/2.67 dB/[Lamda], respectively, are somewhat greater than previously measured values and four times greater than estimates extrapolated from high frequency data.

    Edition Notes

    Statementby Bruce Edward Miller
    ContributionsMassachusetts Institute of Technology
    The Physical Object
    Pagination98 p. :
    Number of Pages98
    ID Numbers
    Open LibraryOL25588130M
    OCLC/WorldCa312746321

    Underwater Acoustic Modeling and ,Underwater Acoustic Modeling and Simulation Third edition Underwater Acoustic Modeling and Simulation Third edition Paul C. Etter First published by Spon Press 11 New Fetter Lane, London EC4P 4EE Simultaneously published in the US Aand Canada by. underwater acoustics modeling and simulation paul c etter (spon press taylorandfrancis pp ):(水下声学建模与仿真保罗c埃特尔(spon出版社taylorandfrancis 页)).pdf,Underwater Acoustic Modeling and Simulation Third edition Underwater Acoustic Modeling and Simulation Third edition Paul C. Etter First published by Spon Press 11 .


Share this book
You might also like
Galley slave

Galley slave

Fiction agonistes

Fiction agonistes

Bridegroom cometh.

Bridegroom cometh.

Tales of all countries.

Tales of all countries.

Entre Nosotros And Workbook Laboratory Manual And Computerized Study Module Webcard And Cassette Program

Entre Nosotros And Workbook Laboratory Manual And Computerized Study Module Webcard And Cassette Program

The good news of God

The good news of God

Facts about insulin-dependent diabetes.

Facts about insulin-dependent diabetes.

The 2000 Import and Export Market for Coal, Lignite, and Peat in Ireland (World Trade Report)

The 2000 Import and Export Market for Coal, Lignite, and Peat in Ireland (World Trade Report)

Chemical analyses of native soil and vegetation samples, Capps coal field, Alaska

Chemical analyses of native soil and vegetation samples, Capps coal field, Alaska

Mineral commodities of Newfoundland and Labrador : zinc and lead.

Mineral commodities of Newfoundland and Labrador : zinc and lead.

significance of visible pathological indicators in estimating the extent of decay in a spruce-balsam forest

significance of visible pathological indicators in estimating the extent of decay in a spruce-balsam forest

Admirals of the Caribbean

Admirals of the Caribbean

Indian Appropriation Bill.

Indian Appropriation Bill.

[Proceedings] Philadelphia, November 12, 1948.

[Proceedings] Philadelphia, November 12, 1948.

Observation and inversion of seismo-acoustic waves in a complex arctic ice environment by Bruce Edward Miller Download PDF EPUB FB2

Observation and inversion of seismo-acoustic waves in a complex arctic ice environment Observation and inversion of seismo-acoustic waves in a complex arctic ice environment by Miller, Bruce Edward.

some content may be lost due to the binding of the book. Addeddate Call number ocn Observation and inversion of seismo-acoustic waves in a complex arctic ice environment book.

Sea ice ridges are typical features in the arctic ice pack accounting for 10%–40% of the total ice mass (Lepparanta, anta, M.

The Drift of Sea Ice, 2nd ed. (Springer-Verlag, Heidelberg).For an acoustic signal propagating long ranges under the ice canopy, scattering of sound by the rough ice interface is a dominant loss : Megan S. Ballard.

The wavenumber integration technique is basically a numerical implementation of the integral transform technique for horizontally stratified media described in Sect. The field solution is in the form of a spectral (wavenumber) integral Cited by: 1. Measured and modeled acoustic propagation underneath the rough Arctic sea-ice Miller and H.

Schmidt, “ Observation and inversion of seismo-acoustic waves in a complex arctic ice environment,” J. Acoust. Soc. by: 2. Miller, B.E. and Schmidt, H., “Observation and inversion of seismo-acoustic waves in a complex arctic ice environment,” J.

of the Acoustical Soc. of Amer., 89(4), pp. – (). CrossRef Google ScholarCited by: Observation and Inversion of Seismo-Acoustic Waves in a Complex Arctic Ice Environment. Article. Propagation of low frequency seismo-acoustic waves in the Arctic. Proc. SPIERemote Sensing of the Ocean, Sea Ice, and Large Water Regions(13 October ); doi: / inversion beam ieee attenuation naval nav vertical prediction transmission loss evaluation proc density khz oceanographic navy tech arctic sediment waveguide shipping Post a Review You can write a book review and share your experiences.

Other. Understanding and constructively using natural sound in the ocean has become of prime importance with the shift of emphasis to protecting the environment and exercising responsible global resource management which has followed the end of the Cold War.

HVSR measurements in complex sedimentary environment and highly structured resonator topography - comparisons with seismic reflection profiles and geophysical borehole logs Wang, B.

GeoEdmonton the 71st Canadian Geotechnical Conference and the 13th Joint CGS/IAH-CNC Groundwater Conference, proceedings;p. Seismological Grand Challenges in Understanding Earth’s Dynamic scientific challenge.

the faulting that generates seismic waves is complex and incompletely understood. moreover, seismic waves shallow marine sediments and beneath the arctic permafrost, gas hydrate (an ice-like substance in which molecules of hydrocarbon. Seafloor investigation has long been a feature of not only seismology but also of acoustics.

Indeed it was acoustics that produced depth sounders, giving us the first capability of producing both global and local maps of the seafloor. The primary goal of this thesis is to utilize acoustical radiation from the Arctic ice cover to infer the response of sea ice to environmental forcing, and to sense remotely the mechanical properties of the ice.

The work makes use of two experiments in the Canadian arctic undertaken by the Ocean Acoustics Group of the Institute of Ocean Sciences, which resulted in an extensive Cited by: 3.

Bayesian inversion of data from effusive volcanic eruptions using physics-based models: Application to Mount St. Helens Journal of Geophysical Research: Solid Earth (5); doi/ jgrb Browse books in the Lecture Notes in Earth Sciences series on UCL is the number one London university for Research Strength (REF), recognised for its academic excellence and global impact.

The Greenland Ice Sheet shows a complex flow pattern, where a few major ice streams drain most of the ice sheet, contributing to sea level rise.

It is therefore crucial to capture ice streams in ice flow models when predicting the future response of the. The combination of complex fjord topography with fast ice-margin retreat by iceberg calving, led to isolation of ice remnants on islands and peninsulas, a process that accelerated the overall rate of deglaciation.

Ice-margin retreat paused betw–11, cal years BP, probably due to cooling during the Preboreal Oscillation. The bilateral cooperation between the Academy of Sciences of the Czech Republic and Chinese Academy of Science provided an opportunity for preliminary investigation of this material which is deposited in the collections of the Institute of Vertebrate Paleontology and Paleoanthropology in Beijing, as well as to see the localities in the field.

Phan L.T.N. (): Seismo-acoustic effects observed during the propagation elastic waves through layered isotropic and anisotropic media. a chapter in a book, several abstracts and a description of localities in the special issue of GeoLines journal were published in The numerical inversion was used to analyze the cumulative.

Transcript. 1 Citations Acknowledging using our IRIS-Related facilities and Data as of Decemberupdated December Please send corrections and/or additions to [email protected]. 2 Aagaard, B.T., R.W. Graves, A. Rodgers, T.M. Brocher, R.W.

Simpson, D. Dreger, N. Petersson, S.C. Larsen, S. Ma, and R.C. Jachens (), 'Ground-Motion modeling of. Zhao, Meng; Ramage, Joan; Semmens, Kathryn; Obleitner, Friedrich (): Recent ice cap snowmelt in Russian High Arctic and anti-correlation with late summer sea ice extent.

In: Environmental Research Letters 9/4, No. Assembly of a large esrthquake from a complex fault system: surface rupture Kinematics of the April 4, El Mayor-Cucapah Mw earthquake.

Geosphere, 10 (3), ISSN: X. surface ice and an ice abundance of around 10 % in the shallow subsurface, within a meter below the surface. Landis et al. quantify the expected sublimation from the surface and subsurface ice reservoirs at Ceres and the expected evaporation rates are factors of several lower than the observed ones.

On Dec. 20,Greenpeace activists harassed Japanese whalers killing minke whales in the Antarctic. On Dec,the Japanese factory whaling ship Nisshin Maru collided with the Greenpeace vessel Arctic Sunrise carrying activists protesting Japan's research kill. Thèmes de Recherche: Numerical simulations of the thermochemical exchanges at the drop scale.

The aim of this numerical project is to determine the dynamics of the liquid iron fragmentation within the molten silicates of the Early Earth mantle and to characterize the fractionation of the siderophile / lithophile elements as well as the thermal exchanges during.

Lagrange Point goes beyond the glossy summary and gets in depth with the research from across the world. Lagrange Point. Insects are often thought of as the enemy of farmers, but they can. Free essays, homework help, flashcards, research papers, book reports, term papers, history, science, politics.

Studylib. Documents Flashcards Grammar checker Login Upload document Very Low Frequency Seismo-Acoustic Noise ( Electromagnetic wave energy converter.

NASA Technical Reports Server (NTRS) Bailey, R. (Inventor) Electromagnetic wave energy is converted into electric power with. When the sea surface is covered by an ice canopy, as in the polar regions (see Figures and ), acoustic interaction with the surface is further complicated by an irregular under-ice surface.

The Arctic environment can be segregated into three distinct regions according to the type of ice cover: (1) pack ice; (2) MIZ; and (3) open ocean.

In this work, we present a novel seismo-acoustic station designed to work reliably in polar regions. To enable year-round seismo-acoustic data collection in such a remote, extreme environment, a hybrid powering system is used, integrating solar panels, a wind generator, and batteries.

Full text of "Current bibliography for aquatic sciences and fisheries" See other formats. Seismology provides a number of cost-effec- tive and noninvasive near-surface imaging methods, including the use of refracted, reflected, and converted body waves, and surface waves to produce 3D and 4D (time-varying) subsurface maps that have applica- tions for hydrology, civil engineering, earthquake haz- ard assessment, archeology, nuclear.

The virtues of this approach to statistical signal processing may be summarized as follows: • The use of an adaptive filtering algorithm, which enables the system to adjust its free parameters (in a supervised or unsupervised manner) in accordance with the underlying statistics of the environment in which the system operates, hence, avoiding.

These waves propagate in relatively thin layers, or “plates”. Lamb, or extensional, waves, are characterized by components of particle motion that are perpendicular to the surface. They are similar to longitudinal waves, with compression and rarefaction, but they are bounded by the top and bottom surfaces of the thin layer.

Propagation, scattering and reverberation in an ice-covered Arctic ocean. Henrik Schmidt MIT, 77 Mass Ave,Cambridge, MAUSA, [email protected], Kevin D. Lepage Naval Research Laboratory, Overlook Ave SW, Washington, DCUSA, @ The Arctic Ocean is a unique acoustic environment due to the ice.

;This book will focus on the history of the practitioner and their unfolding relationship with complex situations – it will not be methodology led.

This book places the practitioner at the centre of a generic model of doing systems. Abstract Glacier and ice sheet mass loss as a result of climate change is driving important coastal changes in Arctic fjords.

Yet limited information exists for Arctic coasts regarding the influence of glacial erosion and ice mass loss on the occurrence and character of turbidity currents in fjords, which themselves affect delta dynamics.

A method to isolate the forward scattered field from the incident field on an object in a complex environment is developed for the purpose of localization. and phase conjugation}, booktitle = {Imaging of complex media with acoustic and seismic waves}, volume = {84}, year = {}, note by propagating ice fractures in the Arctic.}, isbn.

Examples include moving source/receivers in shallow water, and the acoustic emission produced by propagating ice fractures in the Arctic. %Z n/a %8 Jul %9 Article %@ %0 Journal Article %J Journal of the Acoustical Society of America %D %T Matched-phase noise reduction %A Orris, G.

享vip专享文档下载特权; 赠共享文档下载特权; w优质文档免费下载; 赠百度阅读vip精品版; 立即开通Read: @article{RN, author = {Abt, D. L. and Fischer, K. M. and Abers, G. A. and Strauch, W. and Protti, J. M. and Gonzalez, V.}, title = {{Shear wave.Our results shed light on the ecological and physiological properties of ubiquitous marine archaea and highlight their versatile metabolic strategies in deep oceans that might play a critical role in global carbon cycling.}, author = {Li, M and Baker, B J and Anantharaman, K and Jain, S and Breier, J A and Dick, G J}, doi = {/ncomms