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Author : Earl E. Gossard
Publisher : Elsevier Science & Technology
ISBN 13 :
Total Pages : 484 pages
Book Rating : 4.3/5 (91 download)
Download or read book Waves in the Atmosphere written by Earl E. Gossard and published by Elsevier Science & Technology. This book was released on 1975 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Igor Chunchuzov
Publisher : Cambridge Scholars Publishing
ISBN 13 : 1527547760
Total Pages : 355 pages
Book Rating : 4.5/5 (275 download)
Download or read book Infrasound Propagation in an Anisotropic Fluctuating Atmosphere written by Igor Chunchuzov and published by Cambridge Scholars Publishing. This book was released on 2020-02-28 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the theory and results of experimental studies of the propagation of infrasound waves in a real atmosphere with its inherent fine-scale layered structure of wind speed and temperature. It is motivated by the fact that the statistical characteristics of anisotropic (or layered) fluctuations of meteorological fields, the horizontal scales of which significantly exceed their vertical scales, have been very poorly studied compared to those of locally isotropic turbulence in the inertial range of scales. This book addresses this lacuna by developing a theory of the formation of anisotropic inhomogeneities of the atmosphere in a random field of internal gravity waves and vortex structures. Using theory, it explains numerous experimental data depicting the influence of the fine structure of the atmosphere on the propagation of infrasound waves from pulsed sources. The text will appeal to specialists in the fields of acoustics and optics of the atmosphere, remote sensing of the atmosphere, the dynamics of internal waves, nonlinear acoustics, and infrasound monitoring of explosions and natural hazards.
Author : Alexis Le Pichon
Publisher : Springer Science & Business Media
ISBN 13 : 1402095082
Total Pages : 739 pages
Book Rating : 4.4/5 (2 download)
Download or read book Infrasound Monitoring for Atmospheric Studies written by Alexis Le Pichon and published by Springer Science & Business Media. This book was released on 2010-01-19 with total page 739 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of infrasound to monitor the atmosphere has, like infrasound itself, gone largely unheard of through the years. But it has many applications, and it is about time that a book is being devoted to this fascinating subject. Our own involvement with infrasound occurred as graduate students of Prof. William Donn, who had established an infrasound array at the Lamont-Doherty Geological Observatory (now the Lamont-Doherty Earth Observatory) of Columbia University. It was a natural outgrowth of another major activity at Lamont, using seismic waves to explore the Earth’s interior. Both the atmosphere and the solid Earth feature velocity (seismic or acoustic) gradients in the vertical which act to refract the respective waves. The refraction in turn allows one to calculate the respective background structure in these mediums, indirectly exploring locations that are hard to observe otherwise. Monitoring these signals also allows one to discover various phenomena, both natural and man-made (some of which have military applications).
Author : Allan Dale Pierce
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (482 download)
Download or read book Infrasonic Wave Propagation in the Atmosphere written by Allan Dale Pierce and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alexis Le Pichon
Publisher : Springer
ISBN 13 : 3319751409
Total Pages : 1168 pages
Book Rating : 4.3/5 (197 download)
Download or read book Infrasound Monitoring for Atmospheric Studies written by Alexis Le Pichon and published by Springer. This book was released on 2018-10-26 with total page 1168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the publication of the first volume “Infrasound monitoring for atmospheric studies” published in 2010, significant advances were achieved in the fields of engineering, propagation modelling, and atmospheric remote sensing methods. The global infrasound network, which consists of the International Monitoring Network (IMS) for nuclear test ban verification completed by an increasing number of regional cluster arrays deployed around the globe, has evidenced an unprecedented potential for detecting, locating and characterizing various natural and man-made sources. In recent years, infrasound has evolved into a broad interdisciplinary field encompassing academic disciplines of geophysics and innovative technical and scientific developments. The advances in innovative ground-based instruments, including infrasound inversions for continuous observations of the stratosphere and mesosphere, provide useful insights into the geophysical source phenomenology and atmospheric processes involved. Systematic investigations into low-frequency infrasound signals and the development of complementary observational platforms point out new insights into the dynamics of the middle atmosphere which play a significant role in both tropospheric weather and climate. This monitoring system also provides continuous relevant information about natural hazards with high societal benefits, like on-going volcanic eruptions, surface earthquakes, meteorites or severe weather. With this new edition, researchers and students benefit from a comprehensive content of both fundamental and applied inter-disciplinary topics.
Author : Allan D. Pierce
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (227 download)
Download or read book Theoretical Study of the Propagation of Infrasonic Waves in the Atmosphere. Extension of the Method of Normal Modes to Wave Propagation in an Almost-stratified Medium written by Allan D. Pierce and published by . This book was released on 1964 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theory is presented which permits the extension of the method of normal modes to guided wave propagation in a medium with properties varying slowly with horizontal coordinates in addition to varying with the vertical coordinate. The principal assumption of the neglect of coupling between normal modes is justified as long as the horizontal wave numbers of different modes are not too closely spaced. It is predicted that different frequencies in different modes follow different horizontal paths. A ray tracing method is described for computing these paths. The theory is then applied to the study of the dispersion of waves from an explosive source in shallow water with slowly varying depth. (Author).
Author : Walter E. Knabe
Publisher :
ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.:/5 (318 download)
Download or read book Theoretical Study of the Generation of Infrasonic Waves in the Atmosphere written by Walter E. Knabe and published by . This book was released on 1968 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The generation of acoustic and internal gravity waves in the earth's atmosphere by nuclear detonations is considered. Attention is given to a general statement of the problem and to the assessment of the importance of various generation mechanisms in the flows produced by nuclear explosions. From the significant source mechanisms, the corresponding wave emissions are estimated with reference to nuclear detonation outputs. (Author).
Author : Allan D. Pierce
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Propagation of Infrasonic Waves in an Isothermal Atmosphere with Constant Winds written by Allan D. Pierce and published by . This book was released on 1965 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: A dispersion relation for low frequency disturbances in an isothermal atmosphere with constant horizontal winds is derived which related the three components of the wave propagation vector k to the angular frequency omega and which depends on the sound speed, the wind velocity v, and the acceleration of gravity g. The relation is obtainable from that for propagation in an isothermal atmosphere without winds if omega is replaced by omega-k.v. The topology of the propagation surface in k space is examined and it is found that various modes of propagation are possible. The criteria for a given mode existing for given wind speed and frequency are derived and the group velocity of each type of mode is studied. The theory predicts the existence of two wind modes which, at sufficiently high frequencies, have group velocities nearly identical to the wind velocity. Phase velocities of the wind modes also tend to equal the wind velocity. In the latter portion of the paper, the trajectories of fluid particles are studied for each type of wave propagation mode. (Author).
Author : Thomas Rossing
Publisher : Springer Science & Business Media
ISBN 13 : 0387304460
Total Pages : 1179 pages
Book Rating : 4.3/5 (873 download)
Download or read book Springer Handbook of Acoustics written by Thomas Rossing and published by Springer Science & Business Media. This book was released on 2007-06-21 with total page 1179 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an unparalleled modern handbook reflecting the richly interdisciplinary nature of acoustics edited by an acknowledged master in the field. The handbook reviews the most important areas of the subject, with emphasis on current research. The authors of the various chapters are all experts in their fields. Each chapter is richly illustrated with figures and tables. The latest research and applications are incorporated throughout, including computer recognition and synthesis of speech, physiological acoustics, diagnostic imaging and therapeutic applications and acoustical oceanography. An accompanying CD-ROM contains audio and video files.
Author : Lynsey Schroeder (B.)
Publisher :
ISBN 13 :
Total Pages : 194 pages
Book Rating : 4.:/5 (972 download)
Download or read book Infrasound Propagation in Terrestrial Planetary Atmospheres written by Lynsey Schroeder (B.) and published by . This book was released on 2016 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acoustic waves in the infrasonic frequency range, that is below 10 Hertz, have been observed to propagate to high altitudes in Earth's atmosphere. These waves have many sources, both natural and artificial, such as seismic events, convective storm systems, and nuclear explosions. Here, we seek to better understand the characteristics of atmospheric infrasound- below 0.1 Hz in particular- so as to improve the ability to detect their presence and sources. It is well-known that ambient attributes of an atmosphere, such as temperature, density, and composition, directly affect the propagation and growth of waves, and therefore it is likely that these dynamic phenomena are present (and may be detected) on other terrestrial planets with similar atmospheric structures. Using a one-dimensional, nonlinear, compressible atmospheric acoustics model, this thesis seeks to investigate the propagation and dissipation of atmospheric acoustic waves in different terrestrial planetary atmospheres. The model, which includes gravity, molecular viscosity, and thermal conduction, has been developed using numerical solutions in Fortran, and is validated for the atmospheric conditions of Earth, Mars, and Venus. Empirical profiles for these planets are provided by the NASA Global Reference Atmospheric Model (GRAM) packages developed by Marshall Spaceflight Center. The terrestrial planets selected for investigation in this thesis exhibit similar atmospheric structures with very different temperatures, pressures, and compositions, which makes them ideal for a comparative study. The model is used to determine the maximum achieved wave amplitude and propagation time to several altitudes of note as they vary with atmospheric conditions and wave parameters; sensitivity to these parameters on the three planets under investigation are determined. Furthermore, by establishing these sensitivities we may identify conditions that are favorable for detection of infrasound in the upper atmospheres of Earth, Mars, and Venus. By performing large model run sweeps of parameters such as latitude and longitude, time of day, and solar activity, we have drawn correlations between the atmospheric profile of each planet and the maximum achieved amplitude of propagating infrasound. The variations of temperature and gas composition due to ambient conditions directly affect damping of waves by viscosity and thermal conduction, and thus affect the growth of infrasonic wave packets. Venusian waves were found to be the most sensitive to ambient conditions, while waves on Earth were found to be the lease sensitive. Results indicate that upward-propagating atmospheric acoustic waves are readily detectible from the middle and upper atmospheres of Earth and Venus, however those on Mars may only be detectible if they have energetic sources.
Author : Alexis Le Pichon
Publisher :
ISBN 13 : 9781402095191
Total Pages : 756 pages
Book Rating : 4.0/5 (951 download)
Download or read book Infrasound Monitoring for Atmospheric Studies written by Alexis Le Pichon and published by . This book was released on 2010-04-17 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: The infrasound field, the science of low-frequency acoustic waves, has developed into a broad interdisciplinary field encompassing academic disciplines of physics and recent technical and scientific developments. The infrasound network of the International Monitoring Network (IMS) of the CTBT-Organization has demonstrated its capability for detecting and locating infrasonic sources such as meteorites, volcanic eruptions, earthquakes, auroras, mountain associated waves ... Nearly 70% of the global network is now operational and regional cluster arrays are deployed around the globe. Systematic investigations into low-frequency acoustic signals have evidenced an unprecedented potential of the monitoring of infrasonic waves permanently generated by natural and man-made events. Furthermore, recent studies point out new insights on quantitative relationships between observables and atmospheric specifications, and therefore opening new fields into the mathematics of geophysical inverse problems for atmospheric remote sensing. This volume reviews the most important areas of infrasound, with emphasis on the latest researches and applications, e.g. instrumentation, engineering, signal processing, source monitoring, propagation modeling, atmospheric dynamics, global changes, remote sensing methods. Researchers and students will benefit from a comprehensive content of infrasound related topics, where both fundamental and applied topics are discussed by authors from international institutions, all experts in their fields.
Author : Giovanni Leone
Publisher : Springer Nature
ISBN 13 : 3030841030
Total Pages : 328 pages
Book Rating : 4.0/5 (38 download)
Download or read book Mars: A Volcanic World written by Giovanni Leone and published by Springer Nature. This book was released on 2021-10-26 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive advancement about the understanding of the volcanology of Mars in all its aspects, from its primary formation to its evolution in time, from the smaller structures to the bigger structures. It discusses the implications of volcanism in the general environmental and geological context of Mars. The book is validating the Southern Giant Impact Hypothesis explaining the formation of Mars in an interdisciplinary approach, including mineralogical, geochemical, volcanological as well as geomorphological information. Implications for future explorations in terms of resources are provided. This book serves as a textbook for undergraduate and graduate level to foster new basic research in the field of planetary volcanology and is a new guide for future missions toward a volcanic world, including new detailed information for the general audience who is always keen to know more about the history of Mars and its large volcanoes. The book also presents an updated situation about the water resources of the planet.
Author : Thomas Martin Georges
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.:/5 (2 download)
Download or read book Infrasound from Convective Storms written by Thomas Martin Georges and published by . This book was released on 1976 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (61 download)
Download or read book Investigation of the Effects of Fine-Scale Atmospheric Inhomogeneities on Infrasound Propagation written by and published by . This book was released on 2008 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent infrasound observations and related research work in long-range sound propagation indicate that fine-scale atmospheric inhomogeneities contribute to refraction, scattering, and related phenomena that can result in anomalous infrasonic arrivals. Gravity waves, in particular, have been shown through physics-based modeling to be responsible for infrasonic arrivals, at regional ranges, that are not predicted by standard modeling techniques. Atmospheric turbulence can also cause scattering of infrasound that produces arrivals in shadow zones at local ranges from ground based sources. We seek to improve understanding of the effects of gravity waves and other fine-scale atmospheric inhomogeneities, such as Kelvin-Helmholtz turbulent instability, on infrasound propagation. The approach is to build on recent advances in specifying the lower and middle atmosphere, state-of-the-art infrasound propagation calculation techniques, and existing stochastic models of gravity waves and turbulence. Atmospheric specification techniques are being developed that incorporate realistic models of gravity waves that are self-consistent with the background flow field and that include effects of altitude, latitude, longitude, and time-evolution over relevant scales. The research effort includes systematic evaluation of the relevant atmospheric phenomena, improved atmospheric specification, advancement of the state-of-the art of modeling the interactions between fine-scale atmospheric inhomogeneities and infrasound, and model validation studies using ground truth datasets, focusing on local and regional ranges. Anticipated results of the work include new modeling tools to improve capability to predict infrasound arrivals and features relevant to phase classification at local and regional ranges.
Author : Vladimir E. Ostashev
Publisher : CRC Press
ISBN 13 : 1482266652
Total Pages : 537 pages
Book Rating : 4.4/5 (822 download)
Download or read book Acoustics in Moving Inhomogeneous Media written by Vladimir E. Ostashev and published by CRC Press. This book was released on 2015-09-18 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduces Systematic Formulations for Use in Acoustic ApplicationsAcoustics in Moving Inhomogeneous Media, Second Edition offers a uniquely complete and rigorous study of sound propagation and scattering in moving media with deterministic and random inhomogeneities. This study is of great importance in many fields including atmospheric and oceanic
Author : Allan D. Pierce
Publisher :
ISBN 13 :
Total Pages : 66 pages
Book Rating : 4.:/5 (227 download)
Download or read book Theoretical Study of the Propagation of Intrasonic Waves in the Atmosphere written by Allan D. Pierce and published by . This book was released on 1967 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The theory of the propagation of long-period infrasonic waves from nuclear explosions in the atmosphere is reviewed and the extensions of the theory developed under Contract AF19(628)-3891 are described. A simple demonstration of the theoretical basis of amplitude-yield proportionality is given and work on the extension of the normal mode method to include non-stratified windy atmospheres is described. The formulation for incorporating wind effects into theoretical models is reviewed. A justification of the multilayer method is given and numerical results based on this approximation are summarized. The report includes a listing of all reports, journal articles, and symposia papers written under the contract and includes an extensive bibliography on atmospheric waves and nuclear explosions. Recommendations for future research are given. (Author).
Author : United States. Environmental Science Services Administration
Publisher :
ISBN 13 :
Total Pages : 462 pages
Book Rating : 4.3/5 (91 download)
Download or read book Acoustic-gravity Waves in the Atmosphere written by United States. Environmental Science Services Administration and published by . This book was released on 1968 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
