Turbulent Coupling Of The Magnetosphere Ionosphere Through Shear Mode Alfvén Waves

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Alfvén Waves and Static Fields in Magnetosphere/ionosphere Coupling

Author : David J. Knudsen
Publisher : Unknown
Page : 440 pages
File Size : 53,9 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 (

The Role of Turbulence in the Solar Wind, Magnetosphere, Ionosphere Dynamics

Author : Marina Stepanova,Joseph E. Borovsky,Vadim Uritsky,Zoltan Voros,Alessandro Retino,Gaetano Zimbardo
Publisher : Frontiers Media SA
Page : 284 pages
File Size : 48,9 Mb
Release : 2022-03-24
Category : Science
ISBN : 9782889717019

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The Role of Turbulence in the Solar Wind, Magnetosphere, Ionosphere Dynamics by Marina Stepanova,Joseph E. Borovsky,Vadim Uritsky,Zoltan Voros,Alessandro Retino,Gaetano Zimbardo Pdf

Multiscale Processes in the Earth's Magnetosphere: From Interball to Cluster

Author : Jean-Andre Sauvaud,Zdenek Nemecek
Publisher : Springer Science & Business Media
Page : 335 pages
File Size : 42,9 Mb
Release : 2006-05-07
Category : Science
ISBN : 9781402027680

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Multiscale Processes in the Earth's Magnetosphere: From Interball to Cluster by Jean-Andre Sauvaud,Zdenek Nemecek Pdf

The past forty years of space research have seen a substantial improvement in our understanding of the Earth’s magnetosphere and its coupling with the solar wind and interplanetary magnetic ?eld (IMF). The magnetospheric str- ture has been mapped and major processes determining this structure have been de?ned. However, the picture obtained is too often static. We know how the magnetosphere forms via the interaction of the solar wind and IMF with the Earth’s magnetic ?eld. We can describe the steady state for various upstream conditions but do not really understand the dynamic processes leading from one state to another. The main dif?culty is that the magnetosphere is a comp- cated system with many time constants ranging from fractions of a second to days and the system rarely attains a steady state. Two decades ago, it became clear that further progress would require multi-point measurements. Since then, two multi-spacecraft missions have been launched — INTERBALL in 1995/96 and CLUSTER II in 2000. The objectives of these missions d- fered but were complementary: While CLUSTER is adapted to meso-scale processes, INTERBALL observed larger spatial and temporal scales. However, the number of papers taking advantage of both missions simul- neously is rather small.

Dissertation Abstracts International

Author : Anonim
Publisher : Unknown
Page : 784 pages
File Size : 42,6 Mb
Release : 2003
Category : Dissertations, Academic
ISBN : STANFORD:36105113538495

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Dissertation Abstracts International by Anonim Pdf

Kinetic Alfvén Waves in Laboratory, Space, and Astrophysical Plasmas

Author : De-Jin Wu,Ling Chen
Publisher : Springer Nature
Page : 346 pages
File Size : 50,9 Mb
Release : 2020-01-07
Category : Science
ISBN : 9789811379895

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Kinetic Alfvén Waves in Laboratory, Space, and Astrophysical Plasmas by De-Jin Wu,Ling Chen Pdf

This book provides a systematic introduction to the observation and application of kinetic Alfven waves (KAWs) in various plasma environments, with a special focus on the solar-terrestrial coupling system. Alfven waves are low-frequency and long-wavelength fluctuations that pervade laboratory, space and cosmic plasmas. KAWs are dispersive Alfven waves with a short wavelength comparable to particle kinematic scales and hence can play important roles in the energization and transport of plasma particles, the formation of fine magneto-plasma structures, and the dissipation of turbulent Alfven waves. Since the 1990s, experimental studies on KAWs in laboratory and space plasmas have significantly advanced our understanding of KAWs, making them an increasingly interesting subject. Without a doubt, the solar–terrestrial coupling system provides us with a unique natural laboratory for the comprehensive study of KAWs. This book presents extensive observations of KAWs in solar and heliospheric plasmas, as well as numerous applications of KAWs in the solar-terrestrial coupling system, including solar atmosphere heating, solarwind turbulence, solar wind-magnetosphere interactions, and magnetosphere-ionosphere coupling. In addition, for the sake of consistency, the book includes the basic theories and physical properties of KAWs, as well as their experimental demonstrations in laboratory plasmas. In closing, it discusses possible applications of KAWs to other astrophysical plasmas. Accordingly, the book covers all the major aspects of KAWs in a coherent manner that will appeal to advanced graduate students and researchers whose work involves laboratory, space and astrophysical plasmas.

Magnetospheric Current Systems

Author : Shin-ichi Ohtani
Publisher : American Geophysical Union
Page : 398 pages
File Size : 50,6 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.

Energy Research Abstracts

Author : Anonim
Publisher : Unknown
Page : 654 pages
File Size : 55,9 Mb
Release : 1993
Category : Power resources
ISBN : MSU:31293011519018

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Energy Research Abstracts by Anonim Pdf

Modeling Magnetospheric Plasma

Author : T. E. Moore,J. H. Waite, Jr.
Publisher : American Geophysical Union
Page : 322 pages
File Size : 44,9 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.

Magnetosphere-Ionosphere Coupling in the Solar System

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 : 55,6 Mb
Release : 2016-09-28
Category : Science
ISBN : 9781119066965

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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

Micro- to Macro-Scale Dynamics of Earth’s Flank Magnetopause

Author : Kyoung-Joo Hwang,Hiroshi Hasegawa,Katariina Nykyri,Takuma Nakamura,Simon Wing
Publisher : Frontiers Media SA
Page : 234 pages
File Size : 44,8 Mb
Release : 2022-06-03
Category : Science
ISBN : 9782889763191

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Micro- to Macro-Scale Dynamics of Earth’s Flank Magnetopause by Kyoung-Joo Hwang,Hiroshi Hasegawa,Katariina Nykyri,Takuma Nakamura,Simon Wing Pdf

Alfvén Waves Across Heliophysics

Author : Andreas Keiling
Publisher : John Wiley & Sons
Page : 325 pages
File Size : 55,6 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.

Graduate School Commencement

Author : University of Minnesota. Graduate School
Publisher : Unknown
Page : 82 pages
File Size : 40,8 Mb
Release : 1994
Category : Electronic
ISBN : MINN:31951P003178360

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Graduate School Commencement by University of Minnesota. Graduate School Pdf

NASA Thesaurus

Author : Anonim
Publisher : Unknown
Page : 912 pages
File Size : 50,6 Mb
Release : 1994
Category : Aeronautics
ISBN : UOM:39015019101685

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NASA Thesaurus by Anonim Pdf