Alfvén Waves And Static Fields In Magnetosphere Ionosphere Coupling

Author : David J. Knudsen
Publisher : Unknown
Page : 440 pages
File Size : 43,8 Mb
Release : 1990
Category : Ionosphere
ISBN : CORNELL:31924059958581

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Alfvén Waves and Static Fields in Magnetosphere/ionosphere Coupling by David J. Knudsen Pdf

Perturbation electric and magnetic fields carry in excess of 10(exp10) to 10(exp12) W of electrical power between the magnetosphere and high-latitude ionosphere. Most of this power is generated by the solar wind. The ionosphere at large spatial and temporal scales acts as a dissipative slab which can be characterized by its height-integrated Pedersen conductivity sigma p, so that the power flux into the ionosphere due to a quasi-static electric field E is given by sigma (pE2) The energy transferred to the ionosphere by time-varying electromagnetic fields in the form of Alfven waves is more difficult to calculate because density and conductivity gradients can reflect energy. Thus, field resonances and standing wave patterns affect the magnitude and altitude distribution of electrical energy dissipation. We use a numerical model to calculate the frequency-dependent electric field reflection coefficient of the ionosphere and show that the ionosphere does not behave as a simple resistive slab for electric field time scales less than a few seconds. Time variation of spacecraft-measured high-latitude electric and perturbation magnetic fields is difficult to distinguish from spatial structuring that has been Doppler-shifted to a non-zero frequency in the spacecraft frame. However, by calculating the frequency-dependent amplitude and phase relations between fluctuating electric and magnetic fields we are able to show that low frequency fields (

Author : Andreas Keiling
Publisher : John Wiley & Sons
Page : 325 pages
File Size : 55,9 Mb
Release : 2024-04-02
Category : Science
ISBN : 9781394195961

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Alfvén Waves Across Heliophysics by Andreas Keiling Pdf

Alfvén Waves Across Heliophysics Progress, Challenges, and Opportunities Alfvén waves are fundamental to the dynamics of space plasmas. Recent advances in our knowledge about Alfvén waves have come from several directions, including new space missions to unexplored heliospheric regions, sophisticated rocket campaigns in the auroral zone, enlarged magnetometer arrays and radar networks, and significant advances in computer modeling. Alfvén Waves Across Heliophysics: Progress, Challenges, and Opportunities is an interdisciplinary collaboration from different space science communities to review recent and current Alfvén wave research. Volume highlights include: Alfvén waves in the solar atmosphere Alfvén waves at the giant planets Alfvén waves at Mars Alfvén waves in moon-magnetosphere systems Alfvén waves in geospace Alfvén waves in the laboratory The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals.

Author : Anonim
Publisher : Unknown
Page : 704 pages
File Size : 42,7 Mb
Release : 1995
Category : Aeronautics
ISBN : UIUC:30112050127304

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Scientific and Technical Aerospace Reports by Anonim Pdf

Author : Charles R. Chappell,Robert W. Schunk,Peter M. Banks,Richard M. Thorne,James L. Burch
Publisher : John Wiley & Sons
Page : 414 pages
File Size : 43,9 Mb
Release : 2016-09-23
Category : Science
ISBN : 9781119066873

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Magnetosphere-Ionosphere Coupling in the Solar System by Charles R. Chappell,Robert W. Schunk,Peter M. Banks,Richard M. Thorne,James L. Burch Pdf

Over a half century of exploration of the Earth’s space environment, it has become evident that the interaction between the ionosphere and the magnetosphere plays a dominant role in the evolution and dynamics of magnetospheric plasmas and fields. Interestingly, it was recently discovered that this same interaction is of fundamental importance at other planets and moons throughout the solar system. Based on papers presented at an interdisciplinary AGU Chapman Conference at Yosemite National Park in February 2014, this volume provides an intellectual and visual journey through our exploration and discovery of the paradigm-changing role that the ionosphere plays in determining the filling and dynamics of Earth and planetary environments. The 2014 Chapman conference marks the 40th anniversary of the initial magnetosphere-ionosphere coupling conference at Yosemite in 1974, and thus gives a four decade perspective of the progress of space science research in understanding these fundamental coupling processes. Digital video links to an online archive containing both the 1974 and 2014 meetings are presented throughout this volume for use as an historical resource by the international heliophysics and planetary science communities. Topics covered in this volume include: Ionosphere as a source of magnetospheric plasma Effects of the low energy ionospheric plasma on the stability and creation of the more energetic plasmas The unified global modeling of the ionosphere and magnetosphere at the Earth and other planets New knowledge of these coupled interactions for heliophysicists and planetary scientists, with a cross-disciplinary approach involving advanced measurement and modeling techniques Magnetosphere-Ionosphere Coupling in the Solar System is a valuable resource for researchers in the fields of space and planetary science, atmospheric science, space physics, astronomy, and geophysics. Read an interview with the editors to find out more: https://eos.org/editors-vox/filling-earths-space-environment-from-the-sun-or-the-earth

Author : John Clarence Grieger
Publisher : Unknown
Page : 390 pages
File Size : 41,7 Mb
Release : 1993
Category : Electronic
ISBN : MINN:31951D01071177X

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Turbulent Coupling of the Magnetosphere-ionosphere Through Shear- Mode Alfvén Waves by John Clarence Grieger Pdf

Author : Shin-ichi Ohtani
Publisher : American Geophysical Union
Page : 398 pages
File Size : 40,6 Mb
Release : 2000-01-10
Category : Science
ISBN : 9780875909769

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Magnetospheric Current Systems by Shin-ichi Ohtani Pdf

Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 118. The magnetosphere is an open system that interacts with the solar wind. In this system, solar wind energy continuously permeates different regions of the magnetosphere through electromagnetic processes, which we can well describe in terms of current systems. In fact, our ability to use various methods to study magnetospheric current systems has recently prompted significant progress in our understanding of the phenomenon. Unprecedented coverage of satellite and ground?]based observations has advanced global approaches to magnetospheric current systems, whereas advanced measurements of electromagnetic fields and particles have brought new insights about micro?]processes. Increased computer capabilities have enabled us to simulate the dynamics not only of the terrestrial magnetosphere but also the magnetospheres of other planets. Based on such developments, the present volume revisits outstanding issues about magnetospheric current systems.

Author : International Astronomical Union. Symposium
Publisher : Cambridge University Press
Page : 716 pages
File Size : 41,6 Mb
Release : 2009-06-11
Category : Science
ISBN : 0521889901

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Cosmic Magnetic Fields (IAU S259) by International Astronomical Union. Symposium Pdf

IAU Symposium 259 presents the first interdisciplinary, comprehensive review of the role of cosmic magnetic fields, involving astronomers and physicists from across the community. Offering both theoretical and observational topics ranging from Earth's habitability to the origin of the universe, this is an invaluable summary for researchers and graduate students.

Author : Götz Paschmann,Stein Haaland,Rudolf Treumann
Publisher : Springer Science & Business Media
Page : 494 pages
File Size : 45,6 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400710863

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Auroral Plasma Physics by Götz Paschmann,Stein Haaland,Rudolf Treumann Pdf

This volume gives a broad synthesis of the current knowledge and understanding of the plasma physics behind the aurora. The aurora is not only one of the most spectacular natural phenomena on Earth, but the underlying physical processes are expected to be ubiquitous in the plasma universe. Recognizing the enormous progress made over the last decade) through in situ and groundbased measurements as well as theoretical modelling, it seemed timely to write the first comprehensive and integrated book on the subject. Recent advances concern the clarification of the nature of the acceleration process of the electrons that are responsible for the visible aurora, the recognition of the fundamental role of the large-scale current systems in organizing the auroral morphology, and of the interplay between particles and electromagnetic fields.

Author : Romain Maggiolo,Nicolas André,Hiroshi Hasegawa,Daniel T. Welling
Publisher : John Wiley & Sons
Page : 800 pages
File Size : 53,8 Mb
Release : 2021-04-14
Category : Science
ISBN : 9781119829980

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Space Physics and Aeronomy, Magnetospheres in the Solar System by Romain Maggiolo,Nicolas André,Hiroshi Hasegawa,Daniel T. Welling Pdf

Überblick über den aktuellen Wissensstand und künftige Forschungsrichtungen in der Magnetosphärenphysik In den sechs Jahrzehnten seit der Einführung des Begriffs ?Magnetosphäre? sind über den magnetisierten Raum, der jeden Körper in unserem Sonnensystem umgibt, viele Theorien entstanden und viele Erkenntnisse gewonnen worden. Jede Magnetosphäre ist einzigartig und verhält sich doch entsprechend den universellen physikalischen Vorgängen. Der Band ?Magnetospheres in the Solar System? enthält Beiträge von Experten für Experimentalphysik, theoretische Physik und numerische Modellierung, die einen Überblick über verschiedene Magnetosphären vermitteln, von der winzigen Magnetosphäre des Merkur bis zu den gewaltigen planetarischen Magnetosphären von Jupiter und Saturn. Das Werk bietet insbesondere: * Einen kompakten Überblick über die Geschichte der Magnetosphäre, ihre Grundsätze und Gleichungen * Eine Zusammenfassung der grundlegenden Prozesse in der Magnetospährenphysik * Instrumente und Techniken zur Untersuchung von Prozessen in der Magnetosphäre * Eine besondere Schwerpunktsetzung auf die Magnetosphäre der Erde und ihre Dynamik * Eine Darstellung der planetaren Magnetfelder und Magnetosphären im gesamten Sonnensystem * Eine Definition der künftigen Forschungsrichtungen in der Magnetosphärenphysik Die Amerikanische Geophysikalische Vereinigung fördert die wissenschaftliche Erforschung der Erde und des Weltraums zum Wohle der Menschheit. In ihren Publikationen werden wissenschaftliche Erkenntnisse veröffentlicht, die Forschern, Studenten und Fachkräften zur Verfügung stehen.

Author : Mioara Mandea,Monika Korte,Andrew Yau,Eduard Petrovsky
Publisher : Cambridge University Press
Page : 347 pages
File Size : 54,6 Mb
Release : 2019-11-14
Category : Science
ISBN : 9781108418485

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Geomagnetism, Aeronomy and Space Weather by Mioara Mandea,Monika Korte,Andrew Yau,Eduard Petrovsky Pdf

An interdisciplinary review of research in geomagnetism, aeronomy and space weather, written by eminent researchers from these fields.

Author : T. E. Moore,J. H. Waite, Jr.
Publisher : American Geophysical Union
Page : 322 pages
File Size : 47,5 Mb
Release : 1988
Category : Science
ISBN : 9780875900704

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Modeling Magnetospheric Plasma by T. E. Moore,J. H. Waite, Jr. Pdf

Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 44. Existing models of the plasma distribution and dynamics in magnetosphere / ionosphere systems form a patchwork quilt of different techniques and boundaries chosen to define tractable problems. With increasing sophistication in both observational and modeling techniques has come the desire to overcome these limitations and strive for a more unified description of these systems. On the observational side, we have recently acquired routine access to diagnostic information on the lowest energy bulk plasma, completing our view of the plasma and making possible comparisons with magnetohydrodynamic calculations of plasma moments. On the theoretical side, rising computational capabilities and shrewdly designed computational techniques have permitted the first attacks on the global structure of the magnetosphere. Similar advances in the modeling of neutral atmospheric circulation suggest an emergent capability to globally treat the coupling between plasma and neutral gases. Simultaneously, computer simulation has proven to be a very useful tool for understanding magnetospheric behaviors on smaller space and time scales.

Author : Andrew F. Nagy,Michel Blanc,Charles Chappell,Norbert Krupp
Publisher : Springer
Page : 295 pages
File Size : 48,8 Mb
Release : 2016-01-27
Category : Science
ISBN : 9781493935444

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Plasma Sources of Solar System Magnetospheres by Andrew F. Nagy,Michel Blanc,Charles Chappell,Norbert Krupp Pdf

This volume reviews what we know of the corresponding plasma source for each intrinsically magnetized planet. Plasma sources fall essentially in three categories: the solar wind, the ionosphere (both prevalent on Earth), and the satellite-related sources. Throughout the text, the case of each planet is described, including the characteristics, chemical composition and intensity of each source. The authors also describe how the plasma generated at the source regions is transported to populate the magnetosphere, and how it is later lost. To summarize, the dominant sources are found to be the solar wind and sputtered surface ions at Mercury, the solar wind and ionosphere at Earth (the relative importance of the two being discussed in a specific introductory chapter), Io at Jupiter and – a big surprise of the Cassini findings – Enceladus at Saturn. The situation for Uranus and Neptune, which were investigated by only one fly-by each, is still open and requires further studies and exploration. In the final chapter, the book offers a summary of the little we know of Uranus and Neptune, then summarizes in a comparative way what we know of plasma sources throughout the solar system, and proposes directions for future research.

Author : Andreas Keiling,Caitríona Jackman,Peter Delamere
Publisher : John Wiley & Sons
Page : 417 pages
File Size : 40,9 Mb
Release : 2015-02-02
Category : Science
ISBN : 9781118842348

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Magnetotails in the Solar System by Andreas Keiling,Caitríona Jackman,Peter Delamere Pdf

All magnetized planets in our solar system (Mercury, Earth, Jupiter, Saturn, Uranus, and Neptune) interact strongly with the solar wind and possess well developed magnetotails. It is not only the strongly magnetized planets that have magnetotails. Mars and Venus have no global intrinsic magnetic field, yet they possess induced magnetotails. Comets have magnetotails that are formed by the draping of the interplanetary magnetic field. In the case of planetary satellites (moons), the magnetotail refers to the wake region behind the satellite in the flow of either the solar wind or the magnetosphere of its parent planet. The largest magnetotail of all in our solar system is the heliotail, the “magnetotail” of the heliosphere. The variety of solar wind conditions, planetary rotation rates, ionospheric conductivity, and physical dimensions provide an outstanding opportunity to extend our understanding of the influence of these factors on magnetotail processes and structures. Volume highlights include: Discussion on why a magnetotail is a fundamental problem of magnetospheric physics Unique collection of tutorials on a large range of magnetotails in our solar system In-depth reviews comparing magnetotail processes at Earth with other magnetotail structures found throughout the heliosphere Collectively, Magnetotails in the Solar System brings together for the first time in one book a collection of tutorials and current developments addressing different types of magnetotails. As a result, this book should appeal to a broad community of space scientists, and it should also be of interest to astronomers who are looking at tail-like structures beyond our solar system.

Author : Anonim
Publisher : Unknown
Page : 784 pages
File Size : 53,6 Mb
Release : 2003
Category : Dissertations, Academic
ISBN : STANFORD:36105113538495

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Dissertation Abstracts International by Anonim Pdf

Author : Andreas Keiling,Eric Donovan,Fran Bagenal,Tomas Karlsson
Publisher : John Wiley & Sons
Page : 794 pages
File Size : 53,9 Mb
Release : 2013-05-09
Category : Science
ISBN : 9781118671535

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Auroral Phenomenology and Magnetospheric Processes by Andreas Keiling,Eric Donovan,Fran Bagenal,Tomas Karlsson Pdf

Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 197. Many of the most basic aspects of the aurora remain unexplained. While in the past terrestrial and planetary auroras have been largely treated in separate books, Auroral Phenomenology and Magnetospheric Processes: Earth and Other Planets takes a holistic approach, treating the aurora as a fundamental process and discussing the phenomenology, physics, and relationship with the respective planetary magnetospheres in one volume. While there are some behaviors common in auroras of the different planets, there are also striking differences that test our basic understanding of auroral processes. The objective, upon which this monograph is focused, is to connect our knowledge of auroral morphology to the physical processes in the magnetosphere that power and structure discrete and diffuse auroras. Understanding this connection will result in a more complete explanation of the aurora and also further the goal of being able to interpret the global auroral distributions as a dynamic map of the magnetosphere. The volume synthesizes five major areas: auroral phenomenology, aurora and ionospheric electrodynamics, discrete auroral acceleration, aurora and magnetospheric dynamics, and comparative planetary aurora. Covering the recent advances in observations, simulation, and theory, this book will serve a broad community of scientists, including graduate students, studying auroras at Mars, Earth, Saturn, and Jupiter. Projected beyond our solar system, it may also be of interest for astronomers who are looking for aurora-active exoplanets.