Magnetospheric Current Systems

Author : Shin-ichi Ohtani
Publisher : American Geophysical Union
Page : 398 pages
File Size : 55,6 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 : Yukitoshi Nishimura,Olga Verkhoglyadova,Yue Deng,Shun-Rong Zhang
Publisher : Elsevier
Page : 566 pages
File Size : 48,6 Mb
Release : 2021-12-07
Category : Science
ISBN : 9780128213735

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Cross-Scale Coupling and Energy Transfer in the Magnetosphere-Ionosphere-Thermosphere System by Yukitoshi Nishimura,Olga Verkhoglyadova,Yue Deng,Shun-Rong Zhang Pdf

Cross-Scale Coupling and Energy Transfer in the Magnetosphere-Ionosphere-Thermosphere System provides a systematic understanding of Magnetosphere-Ionosphere-Thermosphere dynamics. Cross-scale coupling has become increasingly important in the Space Physics community. Although large-scale processes can specify the averaged state of the system reasonably well, they cannot accurately describe localized and rapidly varying structures in space in actual events. Such localized and variable structures can be as intense as the large-scale features. This book covers observations on quantifying coupling and energetics and simulation on evaluating impacts of cross-scale processes. It includes an in-depth review and summary of the current status of multi-scale coupling processes, fundamental physics, and concise illustrations and plots that are usable in tutorial presentations and classrooms. Organized by physical quantities in the system, Cross-Scale Coupling and Energy Transfer in the Magnetosphere-Ionosphere-Thermosphere System reviews recent advances in cross-scale coupling and energy transfer processes, making it an important resource for space physicists and researchers working on the magnetosphere, ionosphere, and thermosphere. Describes frontier science and major science around M-I-T coupling, allowing for foundational understanding of this emerging field in space physics Reviews recent and key findings in the cutting-edge of the science Discusses open questions and pathways for understanding how the field is evolving

Author : Romain Maggiolo,Nicolas André,Hiroshi Hasegawa,Daniel T. Welling
Publisher : John Wiley & Sons
Page : 61 pages
File Size : 49,6 Mb
Release : 2021-05-04
Category : Science
ISBN : 9781119507529

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

An overview of current knowledge and future research directions in magnetospheric physics In the six decades since the term 'magnetosphere' was first introduced, much has been theorized and discovered about the magnetized space surrounding each of the bodies in our solar system. Each magnetosphere is unique yet behaves according to universal physical processes. Magnetospheres in the Solar System brings together contributions from experimentalists, theoreticians, and numerical modelers to present an overview of diverse magnetospheres, from the mini-magnetospheres of Mercury to the giant planetary magnetospheres of Jupiter and Saturn. Volume highlights include: Concise history of magnetospheres, basic principles, and equations Overview of the fundamental processes that govern magnetospheric physics Tools and techniques used to investigate magnetospheric processes Special focus on Earth’s magnetosphere and its dynamics Coverage of planetary magnetic fields and magnetospheres throughout the solar system Identification of future research directions in magnetospheric physics 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. Find out more about the Space Physics and Aeronomy collection in this Q&A with the Editors in Chief

Author : Erwin O. Flückiger
Publisher : Unknown
Page : 40 pages
File Size : 47,6 Mb
Release : 1982
Category : Cosmic rays
ISBN : UOM:39015095142975

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Effects of Asymmetric Magnetospheric Currents on Cosmic Radiation by Erwin O. Flückiger Pdf

Up to now, most studies were carried out assuming azimuthally symmetric currents, neglecting the well established longitudinal asymmetry in the geomagnetic disturbance at low- and mid-latitudes during magnetic storms. The asymmetric perturbations superposed upon a symmetric field depression has been attributed by several authors to a a longitudinally limited, partial ring current with field aligned closure through the auroral ionosphere (Cummings; Fukushima and Kamide; and references therein). It has been the objective of the research covered by this report to study the effects of such magnetospheric current systems on the propagation of cosmic ray particles through the domain of the earth's magnetosphere. The corresponding results were expected to demonstrate the significance of cosmic ray measurements as an additional tool for magnetospheric studies, especially in modeling the disturbed magnetic field in the magnetosphere. In this report, first the approach to the problem is reviewed in Section 2, and examples of the basic tools needed in the procedure are illustrated in Section 3. Then, in Section 4, the results of a simple study correlating local perturbations in the geomagnetic field with cosmic ray cutoff rigidity variations are discussed. Section 5 contains a summary of a detailed quantitative analysis on the effects of a partial ring current and of field-aligned currents on both cutoff rigidities and asymptotic directions in different latitude regions. In conclusions, the significance of the results obtained in the entire study is discussed in Section 6 for both magnetospheric and cosmic ray research.

Author : Malcolm Wray Dunlop,Hermann Lühr
Publisher : Springer Nature
Page : 296 pages
File Size : 45,9 Mb
Release : 2019-10-29
Category : Science
ISBN : 9783030267322

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Ionospheric Multi-Spacecraft Analysis Tools by Malcolm Wray Dunlop,Hermann Lühr Pdf

This open access book provides a comprehensive toolbox of analysis techniques for ionospheric multi-satellite missions. The immediate need for this volume was motivated by the ongoing ESA Swarm satellite mission, but the tools that are described are general and can be used for any future ionospheric multi-satellite mission with comparable instrumentation. In addition to researching the immediate plasma environment and its coupling to other regions, such a mission aims to study the Earth’s main magnetic field and its anomalies caused by core, mantle, or crustal sources. The parameters for carrying out this kind of work are examined in these chapters. Besides currents, electric fields, and plasma convection, these parameters include ionospheric conductance, Joule heating, neutral gas densities, and neutral winds.

Author : Alan D. Chave,Alan G. Jones
Publisher : Cambridge University Press
Page : 571 pages
File Size : 44,5 Mb
Release : 2012-04-26
Category : Science
ISBN : 9780521819275

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The Magnetotelluric Method by Alan D. Chave,Alan G. Jones Pdf

A rigorous introduction to magnetotelluric imaging of Earth's electrical conductivity and structure, for researchers, advanced students and industrial practitioners.

Author : Y. Kamide,Wolfgang Baumjohann
Publisher : Springer Science & Business Media
Page : 178 pages
File Size : 47,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642500626

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Magnetosphere-Ionosphere Coupling by Y. Kamide,Wolfgang Baumjohann Pdf

In the past two decades a succession of direct observations by satellites, and of extensive computer simulations, has led to the realization that the polar ionosphere plays a principal role in large-scale magnetospheric processes - a manifestation of the physics linkage involved in solar-terrestrial interactions. Spatial/temporal variations in high-latitude electromagnetic phenomena, such as dynamic aurorae, electric fields and currents, have proved to be extremely complex. Now the challenge is to comprehend the vast amount of complicated measurements made in this magnetosphere-ionosphere sysstem of the Earth. This book addresses the electrical coupling between the hot, but dilute, magnetospheric plasma and the cold, but dense, plasma in the ionosphere. In five major chapters, this book presents: - basic properties of magnetosphere-ionosphere coupling; - morphology of electric fields and currents at high latitudes; - global modeling of magnetosphere-ionosphere coupling; - modeling of ionospheric electrodynamics; - current issues, such as auroral particle acceleration, substorms, penetration of high-latitude fields into low latitudes.

Author : William Liu,Masaki Fujimoto
Publisher : Springer Science & Business Media
Page : 367 pages
File Size : 54,5 Mb
Release : 2011-06-21
Category : Science
ISBN : 9789400705012

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The Dynamic Magnetosphere by William Liu,Masaki Fujimoto Pdf

Despite the plethora of monographs published in recent years, few cover recent progress in magnetospheric physics in broad areas of research. While a topical focus is important to in-depth views at a problem, a broad overview of our field is also needed. The volume answers to the latter need. With the collection of articles written by leading scientists, the contributions contained in the book describe latest research results in solar wind-magnetosphere interaction, magnetospheric substorms, magnetosphere-ionosphere coupling, transport phenomena in the plasma sheet, wave and particle dynamics in the ring current and radiation belts, and extra-terrestrial magnetospheric systems. In addition to its breadth and timeliness, the book highlights innovative methods and techniques to study the geospace.

Author : Thomas A. Potemra
Publisher : Unknown
Page : 376 pages
File Size : 53,6 Mb
Release : 1984
Category : Science
ISBN : UCSD:31822000472639

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Magnetospheric Currents by Thomas A. Potemra Pdf

Author : Wayne Keith,Walter Heikkila
Publisher : Academic Press
Page : 642 pages
File Size : 49,5 Mb
Release : 2020-11-24
Category : Science
ISBN : 9780128181614

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Earth's Magnetosphere by Wayne Keith,Walter Heikkila Pdf

Earth's Magnetosphere: Formed by the Low Latitude Boundary Layer, Second Edition, provides a fully updated overview of both historical and current data related to the magnetosphere and how it is formed. With a focus on experimental data and space missions, the book goes in depth relating space physics to the Earth’s magnetosphere and its interaction with the solar wind. Starting with Newton’s law, this book also examines Maxwell’s equations and subsidiary equations such as continuity, constitutive relations and the Lorentz transformation, Helmholtz’ theorem, and Poynting’s theorem, among other methods for understanding this interaction. This new edition of Earth’s Magnetosphere is updated with information on such topics as 3D reconnection, space weather implications, recent missions such as MMS, ionosphere outflow and coupling, and the inner magnetosphere. With the addition of end-of-chapter problems as well, this book is an excellent foundational reference for geophysicists, space physicists, plasma physicists, and graduate students alike. Offers an historical perspective of early magnetospheric research, combined with progress up to the present Describes observations from various spacecraft in a variety of regions, with explanations and discussions of each Includes chapters on prompt particle acceleration to high energies, plasma transfer event, and the low latitude boundary layer

Author : Syun-Ichi Akasofu
Publisher : Springer Science & Business Media
Page : 620 pages
File Size : 52,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789401011648

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Physics of Magnetospheric Substorms by Syun-Ichi Akasofu Pdf

Man, through intensive observations of natural phenomena, has learned about some of the basic principles which govern nature. The aurora is one of the most fascinating of these natural phenomena, and by studying it, man has just begun to comprehend auroral phenomena in terms of basic cosmic electrodynamic processes. The systematic and extensive observation of the aurora during and after the great international enterprise, the International Geophysical Year (lGY), led to the concept of the auroral substorm. Like many other geophysical phenomena, auroral displays have a dual time (universal- and local-time) dependence when seen by a ground-based observer. Thus, it was a difficult task for single observers, rotating with the Earth once a day, to grasp a transient feature of a large-scale auroral display. Such a complexity is inevitable in studying many geophysical features, in particular the polar upper atmospheric phenomena. However, it was found that their complexity began to unfold when the concept of the auroral substorm was introduced. In a book entitled Polar and Magnetospheric Substorms, the predeces sor to this book, I tried to describe the auroral phenomena as completely as possible in terms of the concept of the auroral substorm. At that time, the first satellite observations of particles and magnetic fields during substorms were just becoming available, and it was suggested that the auroral sub storm is a manifestation of a magnetospheric phenomenon called the magnetospheric substorm.

Author : Vania K. Jordanova,Raluca Ilie,Margaret W. Chen
Publisher : Elsevier
Page : 334 pages
File Size : 44,7 Mb
Release : 2020-06-18
Category : Science
ISBN : 9780128155721

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Ring Current Investigations by Vania K. Jordanova,Raluca Ilie,Margaret W. Chen Pdf

Ring Current Investigations offers a comprehensive description of ring current dynamics in the Earth’s magnetosphere as part of the coupled magnetosphere-ionosphere system. In order to help researchers develop a deeper understanding of the fundamental physics of geomagnetic storms, it includes a detailed description of energetic charged particles injection, trapping, and loss. It reviews historical and recent advances in observations, measurements, theory and simulations of the inner magnetosphere and its coupling to the ionosphere and other surrounding plasma populations. In addition, it compares the physics of ring currents at other strongly magnetized planets in the solar system, specifically Jupiter, Saturn, Uranus and Neptune, with the ring current system at Earth. Providing a description of the most important space weather effects driven by inner magnetospheric energetic particles during geomagnetic storms and present capabilities for their nowcast and forecast, Ring Current Investigations is an important reference for researchers in geophysics and space science, especially related to plasma physics, the ionosphere and magnetosphere, solar-terrestrial relations, and spacecraft anomalies. Includes an appendix with links to downloadable video clips, illustrating features of ring current and geomagnetic storm dynamics Provides overview of existing state-of-the-art numerical models and links for open-source code downloads Offers guidance on how to develop numerical models within the context of the present-day understanding

Author : Syun-Ichi Akasofu
Publisher : Springer Science & Business Media
Page : 650 pages
File Size : 55,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400995192

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Dynamics of the Magnetosphere by Syun-Ichi Akasofu Pdf

The Los Alamos Chapman Conference on Magnetospheric Substorms and Related Plasma Processes can be considered the fourth in a series devoted to magnetospheric substorms, after the Moscow (1971), Houston (1972), and Bryce Mountain (1974) meetings. The main motivation for organizing the Los Alamos Conference was that magnetospheric substorm studies have advanced enough to the point of bringing experimenters, analysts and theorists together to discuss major substorm problems with special emphasis on theoretical interpretations in terms of plasma processes. In spite of an extremely heavy schedule from 8:30 A.M. to 10:00 P.M., every session was conducted in an enjoyable and spirited atmosphere. In fact, during one of the afternoons that we had put aside for relaxation, John Winckler led a group of the attendees in a climb to the ceremonial cave of a prehistoric Indian ruin at Bandelier National Monument, near Los Alamos under a crystal blue sky and a bright New Mexico sun. There, they danced as the former dwellers of the pueblo had, perhaps as an impromptu evocation of a magnetospheric event.

Author : Erwin O. Flückiger
Publisher : Unknown
Page : 36 pages
File Size : 55,6 Mb
Release : 1982
Category : Cosmic rays
ISBN : OCLC:11102430

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Effects of Asymmetric Magnetospheric Currents on Cosmic Radiation by Erwin O. Flückiger Pdf

Up to now, most studies were carried out assuming azimuthally symmetric currents, neglecting the well established longitudinal asymmetry in the geomagnetic disturbance at low- and mid-latitudes during magnetic storms. The asymmetric perturbations superposed upon a symmetric field depression has been attributed by several authors to a a longitudinally limited, partial ring current with field aligned closure through the auroral ionosphere (Cummings; Fukushima and Kamide; and references therein). It has been the objective of the research covered by this report to study the effects of such magnetospheric current systems on the propagation of cosmic ray particles through the domain of the earth's magnetosphere. The corresponding results were expected to demonstrate the significance of cosmic ray measurements as an additional tool for magnetospheric studies, especially in modeling the disturbed magnetic field in the magnetosphere. In this report, first the approach to the problem is reviewed in Section 2, and examples of the basic tools needed in the procedure are illustrated in Section 3. Then, in Section 4, the results of a simple study correlating local perturbations in the geomagnetic field with cosmic ray cutoff rigidity variations are discussed. Section 5 contains a summary of a detailed quantitative analysis on the effects of a partial ring current and of field-aligned currents on both cutoff rigidities and asymptotic directions in different latitude regions. In conclusions, the significance of the results obtained in the entire study is discussed in Section 6 for both magnetospheric and cosmic ray research.

Author : Scott Alan Thaller,Jean-Francois Ripoll,Toshi Nishimura,Philip J. Erickson
Publisher : Frontiers Media SA
Page : 342 pages
File Size : 44,8 Mb
Release : 2022-11-14
Category : Science
ISBN : 9782832505564

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Coupled Feedback Mechanisms in the Magnetosphere-Ionosphere System by Scott Alan Thaller,Jean-Francois Ripoll,Toshi Nishimura,Philip J. Erickson Pdf