Physics Of Magnetospheric Substorms

Author : Syun-Ichi Akasofu
Publisher : Springer Science & Business Media
Page : 620 pages
File Size : 55,8 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 : Syun-Ichi Akasofu
Publisher : Unknown
Page : 624 pages
File Size : 50,8 Mb
Release : 1977-02-28
Category : Electronic
ISBN : 9401011656

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Physics of Magnetospheric Substorms by Syun-Ichi Akasofu Pdf

Author : Syun-Ichi Akasofu
Publisher : Springer Science & Business Media
Page : 293 pages
File Size : 48,6 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789401034616

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Polar and Magnetospheric Substorms by Syun-Ichi Akasofu Pdf

It has become increasingly clear that the magnetosphere becomes intermittently unstable and explosively releases a large amount of energy into the polar upper atmos phere. This particular magnetospheric phenomenon is called the magnetospheric sub storm. It is manifested as an activity or disturbance ofvarious polar upper atmospheric phenomena, such as intense auroral displays and X-ray bursts. Highly active conditions in the polar upper atmosphere result from a successive occurrence of such an element ary activity, the polar substorm, which lasts typically of order one to three hours. The concept of the magnetospheric substorm and its manifestation in the polar upper atmosphere, the polar substorm, has rapidly crystallized during the last few years. We can find a hint of such a concept in the term 'polar elementary storm' introduced by Kristian Birkeland as early as 1908. However, we are greatly indebted to Sydney Chapman, who established the basic foundation of magnetospheric physics and has led researches in this field during the last half century. Indeed, the terms 'polar magnetic substorm' and 'auroral substorm' were first suggested by Sydney Chapman. The concept of the substorm was then soon extended by Neil M. Brice of Cornell University, and Kinsey A. Anderson and his colleagues at the University ofCaliforrlia, Berkeley, who introduced the term 'magnetospheric substorm'. We owe many of these recent developments in magnetospheric physics to the great international enterprise, the International Geophysical Year (IGY) and subse quent international cooperative effort (IGC, IQSY).

Author : Syun-Ichi Akasofu
Publisher : Springer Science & Business Media
Page : 650 pages
File Size : 55,6 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 : Charles F. Kennel
Publisher : Oxford University Press
Page : 429 pages
File Size : 53,8 Mb
Release : 1996-02-08
Category : Science
ISBN : 9780195359077

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Convection and Substorms by Charles F. Kennel Pdf

The magnetosphere is the region where cosmic rays and the solar wind interact with the Earth's magnetic field, creating such phenomena as the northern lights and other aurorae. The configuration and dynamics of the magnetosphere are of interest to planetary physicists, geophysicists, plasma astrophysicists, and to scientists planning space missions. The circulation of solar wind plasma in the magnetosphere and substorms have long been used as the principle paradigms for studying this vital region. Charles F. Kennel, a leading scientist in the field, here presents a synthesis of the convection and substorm literatures, and an analysis of convection and substorm interactions; he also suggests that the currently accepted steady reconnection model may be advantageously replaced by a model of multiple tail reconnection events, in which many mutually interdependent reconnections occur. Written in an accessible, non-mathematical style, this book introduces the reader to the exciting discoveries in this fast-growing field.

Author : Syun-Ichi Akasofu
Publisher : Unknown
Page : 676 pages
File Size : 46,6 Mb
Release : 1979-12-31
Category : Electronic
ISBN : 9400995202

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Dynamics of the Magnetosphere by Syun-Ichi Akasofu Pdf

Author : William Liu,Masaki Fujimoto
Publisher : Springer Science & Business Media
Page : 367 pages
File Size : 47,7 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 : Joseph R. Kan
Publisher : American Geophysical Union
Page : 510 pages
File Size : 53,6 Mb
Release : 1991-01-08
Category : Science
ISBN : UCSD:31822007909286

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Magnetospheric Substorms by Joseph R. Kan Pdf

Papers from the Chapman Conference on Magnetospheric Substorms, held Sept. 3-7, 1990, in Hakone, Japan.

Author : Susumu Kokubun,Yōsuke Kamide
Publisher : Springer
Page : 823 pages
File Size : 46,8 Mb
Release : 1998
Category : Science
ISBN : 0792354656

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Substorms-4 by Susumu Kokubun,Yōsuke Kamide Pdf

The Fourth International Conference on Substorms (ICS-4) was held at Lake Hamana, Japan on March 9-13, 1998. This volume represents a snapshot of substorm research as of 1998. The proceedings address the following key questions: What are the major expansion phase activities seen in various regions? What triggers the substorm expansion onset? What are the roles of waves and microscopic processes in large-scale substorm processes? What is the relationship between global convection and substorms? What is the role of the inner magnetosphere during substorms? For each of the five key questions, the current status of observational and modeling efforts in the field is presented in the invited and contributed papers. This volume will foster communication between magnetospheric and high-latitude ionospheric physicists and those scientists who are working primarily in the area of the thermosphere and low-latitude ionosphere.

Author : E.R. Dyer,J.G. Roederer
Publisher : Springer Science & Business Media
Page : 322 pages
File Size : 53,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789401031301

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The Magnetosphere by E.R. Dyer,J.G. Roederer Pdf

Author : Y. Kamide,Wolfgang Baumjohann
Publisher : Springer Science & Business Media
Page : 178 pages
File Size : 41,9 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 : Walter Heikkila
Publisher : Elsevier
Page : 535 pages
File Size : 44,5 Mb
Release : 2011-08-13
Category : Science
ISBN : 9780080931654

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Earth's Magnetosphere by Walter Heikkila Pdf

The author argues that, after five decades of debate about the interactive of solar wind with the magnetosphere, it is time to get back to basics. 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. Includes chapters on prompt particle acceleration to high energies, plasma transfer event, and the low latitude boundary layer More than 200 figures illustrate the text Includes a color insert

Author : Paul L. Rothwell
Publisher : Unknown
Page : 52 pages
File Size : 51,6 Mb
Release : 1978
Category : Atmospheric physics
ISBN : UOM:39015095138791

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A Dynamical Model for the Onset of Magnetospheric Substorms by Paul L. Rothwell Pdf

A model for the onset of magnetospheric substorms is developed based on the observations of Pytte et al (1976). North-south single-particle motion across the plasma sheet becomes instrumental in generating magnetic instabilities when the plasma sheet is sufficiently compressed. The number density times the square of the plasma sheet thickness is found to be the critical parameter (nl squared less than or equal to 8.1 x 10 to the 15th power protons/cm). A merging theory is developed based on these magnetic instabilities. The nightside merging rate is controlled by the value of the magnetic field in the tail lobes which, in turn, is dependent on the dayside merging rate. Merging and collisional damping of the J X B force contribute to the heating of the plasma sheet. The 10-15 min interval between onsets is interpreted in terms of a weak coupling between the tail lobes and the plasma sheet. A straightforward application of small-amplitude oscillation theory shows that the period between onsets is a direct measure of the mean collision frequency in the plasma sheet. The obtained value is in good agreement with that calculated from the resistivity relation. (Author).

Author : James L. Burch,Roy B. Torbert
Publisher : Springer
Page : 0 pages
File Size : 42,9 Mb
Release : 2016-12-16
Category : Science
ISBN : 9402408606

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Magnetospheric Multiscale by James L. Burch,Roy B. Torbert Pdf

NASA’s Magnetospheric Multiscale (MMS) mission is a four-spacecraft Solar Terrestrial Probe mission to study magnetic reconnection, a fundamental plasma physical process in which energy stored in a magnetic field is converted into the kinetic energy of charged particles and heat. The driver of eruptive solar events such as flares and coronal mass ejections, magnetic reconnection is also the process by which energy is transferred from the solar wind to Earth’s magnetosphere. Flying in a tetrahedral formation, the four identically instrumented MMS spacecraft measure the plasma, electric and magnetic fields, and energetic particles in the regions of geospace where magnetic reconnection is expected to occur. With interspacecraft distances varying from 400 km to 10 km and instruments capable of making extremely fast measurements (30 ms for electrons), MMS has the spatial and temporal resolution needed to resolve for the first time the microphysics of the electron diffusion region. Here, the magnetic field and the plasma become decoupled, allowing reconnection to occur. During the first of its two mission phases, MMS targets the dayside magnetopause, where the interplanetary and terrestrial magnetic fields reconnect. In the second phase, MMS increases its apogee from 12 RE to 25 RE and probes the nightside magnetosphere, where energy stored in the stretched field lines of the magnetotail is explosively released in magnetospheric substorms. Launched in March 2015 into a low-inclination elliptical orbit, MMS is now in Phase 1 of science operations. This volume, which describes the MMS mission design, observatories, instrumentation, and operations, is aimed at researchers and graduate students in magnetospheric physics and plasma physics. Researchers using the publicly available MMS data will find it particularly useful. Previously published in Space Science Reviews, Volume 199, Nos. 1-4, 2016.

Author : G. A. Skuridin
Publisher : Unknown
Page : 304 pages
File Size : 49,8 Mb
Release : 1974
Category : Isotope geology
ISBN : UOM:39015042072416

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Interplanetary Medium and Physics of the Magnetosphere by G. A. Skuridin Pdf