Download or read book An Investigation of High latitude Ionosphere thermosphere Dynamics and Electrodynamics written by Fang Li and published by . This book was released on 2001 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Electrodynamics and Fluid Dynamics Study of the High Latitude Ionosphere written by Da-Yue Zhang and published by . This book was released on 1989 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling the Ionosphere Thermosphere written by J. D. Huba and published by John Wiley & Sons. This book was released on 2014-03-17 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 201. Modeling the Ionosphere-Thermosphere System brings together for the first time a detailed description of the physics of the IT system in conjunction with numerical techniques to solve the complex system of equations that describe the system, as well as issues of current interest. Volume highlights include discussions of: Physics of the ionosphere and thermosphere IT system, and the numerical methods to solve the basic equations of the IT system The physics and numerical methods to determine the global electrodynamics of the IT system The response of the IT system to forcings from below (i.e., the lower atmosphere) and from above (i.e., the magnetosphere) The physics and numerical methods to model ionospheric irregularities Data assimilation techniques, comparison of model results to data, climate variability studies, and applications to space weather Providing a clear description of the physics of this system in several tutorial-like articles, Modeling the Ionosphere-Thermosphere System is of value to the upper atmosphere science community in general. Chapters describing details of the numerical methods used to solve the equations that describe the IT system make the volume useful to both active researchers in the field and students.
Download or read book The Earth s Ionosphere written by Michael Kelly and published by Elsevier. This book was released on 2012-12-02 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Earth's Ionosphere: Plasma Physics and Electrodynamics emphasizes the study of plasma physics and electrodynamics of the ionosphere, including many aeronomical influences. The ionosphere is somewhat of a battleground between the earth's neutral atmosphere and the sun's fully ionized atmosphere, in which the earth is embedded. One of the challenges of ionosphere research is to know enough about these two vast fields of research to make sense out of ionospheric phenomena. This book provides insights into how these competing sources of mass, momentum, and energy compete for control of the ionosphere. Some of the topics discussed include the fundamentals of ionospheric plasma dynamics; equatorial plasma instabilities; high-latitude electrodynamics; and instabilities and structure in the high-latitude ionosphere. Throughout this text only the region above 90 km are discussed, ignoring the D region entirely. This publication is a good source of information for students and individuals conducting research on earth's ionosphere.
Download or read book Space Physics and Aeronomy Ionosphere Dynamics and Applications written by Chao Huang and published by John Wiley & Sons. This book was released on 2021-05-11 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive review of global ionospheric research from the polar caps to equatorial regions It's more than a century since scientists first identified the ionosphere, the layer of the Earth’s upper atmosphere that is ionized by solar and cosmic radiation. Our understanding of this dynamic part of the near-Earth space environment has greatly advanced in recent years thanks to new observational technologies, improved numerical models, and powerful computing capabilities. Ionosphere Dynamics and Applications provides a comprehensive overview of historic developments, recent advances, and future directions in ionospheric research. Volume highlights include: Behavior of the ionosphere in different regions from the poles to the equator Distinct characteristics of the high-, mid-, and low-latitude ionosphere Observational results from ground- and space-based instruments Ionospheric impacts on radio signals and satellite operations How earthquakes and tsunamis on Earth cause disturbances in the ionosphere 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
Download or read book Magnetospheric and High latitude Ionospheric Electrodynamics written by William J. Burke and published by . This book was released on 1982 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides an introductory overview of electrodynamic interactions between the magnetosphere and ionosphere. In the first half of the paper, the viscous interaction and magnetic merging models for driving convection are described. The notion of adiabatic heating as a natural consequence of convection is introduced, in conjunction with a quasi-empirical model for the magnetospheric potential. The second half of the paper concerns observations of electrodynamic quantities taken in the topside ionosphere in the polar cap and auroral oval.
Download or read book Electrodynamics of the High Latitude Ionosphere written by R. A. Heelis and published by . This book was released on 1988 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: A broad range of scientific investigations ranging from the development of large scale models of ionospheric convection to small scale plasma flows associated with polar cap arcs is described. It is shown that during times of northward IMF, coherent mesoscale convection features can frequently be identified at high latitudes. We now have the ability to quite accurately reproduce the convective features of the plasma at high latitudes during periods of southward IMF. Advance in our understanding of electric field coupling in plasma structures and the differences in local and height integrated Joule heating rates are also described. The importance of the bottomside F-region concentration in determining the effectiveness of electrical coupling is emphasized. Keywords: Aurora; Ionosphere; Electric fields. (JHD).
Download or read book Ionospheric Multi Spacecraft Analysis Tools written by Malcolm Wray Dunlop and published by Springer Nature. This book was released on 2019-10-29 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book The Response of Ionosphere and Thermosphere to the High Latitude Energy Deposition written by Yang Lu (Ph.D.) and published by . This book was released on 2019 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ionosphere and thermosphere are the important regions in the Earth upper atmosphere. They represent the ionized and neutral particles, respectively. The main external energy sources in those regions are solar radiation and geomagnetic energy due to the solar wind-magnetosphere interaction. The neutral particles are ionized by solar radiation on the dayside. Meanwhile, the energy deposition from the magnetosphere is also critical at high latitudes. The energy source at high latitudes depends on whether the local magnetic field line is closed or not. In the polar cap region where it is connected to open magnetic field line, the main energy source is from solar wind or the magnetosheath. In the aurora region where it is related to the closed field line, the main energy source is from magnetotail. The Poynting flux and particle precipitation are two kinds of energy sources at high latitudes. Energy deposition at high latitudes influences the ionization and electrodynamics in the upper atmosphere, which has practical importance since the ionization particles in the upper atmosphere influence the radio propagation significantly. Therefore, the high latitude ionosphere and thermosphere are the most dynamic regions in the upper atmosphere since the different kinds of energy deposition. In this work, the energy deposition and the ionosphere/thermosphere response at the high latitudes have been studied. First, Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) electron density profiles are used to study the conductance at different altitudes. Ionospheric conductivity plays an important role in the magnetosphere-ionosphere coupling. The altitudinal distribution of Pedersen conductivity gives us a rough idea about the altitudinal distribution of Joule heating at high latitudes, which is of great significance regarding the response of upper atmosphere to geomagnetic energy inputs. Based on the electron density profilesderived from the COSMIC measurements during 2009-2014, Pedersen conductivity has been estimated. A climatologic study of the height-integrated Pedersen conductivity in both E (100-150 km) and F (150-600 km) regions, and their ratio under different solar and geomagnetic conditions has been conducted. Second, the Poynting flux and particle precipitation data from DMSP F15 are used to study the energy deposition in the polar cap boundary regions. Poynting flux, which describes electromagnetic energy flux, is an important energy source for the high latitude upper atmosphere. After the launch of Defense Meteorological Satellite Program (DMSP) F15 spacecraft with a boom-mounted magnetometer on board, there was a new opportunity to calculate Earth-directed Poynting flux at satellite altitudes(~850 km) in the upper atmosphere. A persistent enhancement of thermospheric density in the dayside polar cap boundary regions has been reported in the CHAMP satellite observations. To understand the significance of different physical mechanisms including Poynting flux and particle precipitation, and the correlation between them, a statistical study of Poytning flux and particle energy flux in the dayside cusp and low latitude boundary layer (LLBL) regions has been conducted based on DMSP F15 measurements. At last, the Global Ionosphere and Thermosphere Model (GITM) are used to study the response to the geomagnetic storm event. Ion velocity in the Sub Aurora region observed by Satellites in storm time often shows a significant westward component. The high-speed westward stream is distinguished with convection pattern. This kind of events is called Sub Aurora Polarization Stream (SAPS). In March 17th 2013 storm, DMSPF18 satellite observed several SAPS cases when crossing Sub Aurora region. In this study, Global Ionosphere Thermosphere Model (GITM) has been coupled to UCLA-RCM model to simulate the impact of SAPS during March 2013 event on the ionosphere/thermosphere.
Download or read book Geomagnetism Aeronomy and Space Weather written by Mioara Mandea and published by Cambridge University Press. This book was released on 2019-11-14 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: An interdisciplinary review of research in geomagnetism, aeronomy and space weather, written by eminent researchers from these fields.
Download or read book The Earth s Ionosphere written by Michael C. Kelley and published by Academic Press. This book was released on 2009-06-12 with total page 593 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although interesting in its own right, due to the ever-increasing use of satellites for communication and navigation, weather in the ionosphere is of great concern. Every such system uses trans-ionospheric propagation of radio waves, waves which must traverse the commonly turbulent ionosphere. Understanding this turbulence and predicting it are one of the major goals of the National Space Weather program. Acquiring such a prediction capability will rest on understanding the very topics of this book, the plasma physics and electrodynamics of the system. - Fully updated to reflect advances in the field in the 20 years since the first edition published - Explores the buffeting of the ionosphere from above by the sun and from below by the lower atmosphere - Unique text appropriate both as a reference and for coursework
Download or read book Midlatitude Ionospheric Dynamics and Disturbances written by Paul M. Kintner, Jr. and published by John Wiley & Sons. This book was released on 2013-05-03 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 181. Filling the need for a 20-year lag in substantial consideration of the midlatitude ionosphere, this volume focuses on work that takes advantage of GPS and UV imaging from satellites over the past decade, two methods that have profoundly transformed our understanding of this stratum of the atmosphere. Its interdisciplinary content brings together researchers of the solar wind, magnetosphere, ionosphere, thermosphere, polar and equatorial ionospheres, and space weather. Modeling and assimilative imaging of the ionosphere and thermosphere show for the first time the complex and global impact of midlatitude ionospheric storms. The editors invited the leading experts in the following areas to contribute the chapters herein: Characterization of Midlatitude Storms Electric Field Coupling From the Heliosphere and Inner Magnetosphere Thermospheric Control of the Midlatitude Ionosphere Ionospheric Irregularities Experimental Methods and New Techniques These themes were chosen to create a path for understanding the midlatitude ionosphere. They continue to be largely valid and represent a coherent division of the subject matter. They will be critical for understanding space weather during the upcoming solar maximum. This book was inspired by the Chapman Conference of the same name held January 2007.
Download or read book Cross Scale Coupling and Energy Transfer in the Magnetosphere Ionosphere Thermosphere System written by Yukitoshi Nishimura and published by Elsevier. This book was released on 2021-12-07 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book High Latitude Ionospheric Dynamics During Conditions of Northward IMF written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-20 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to better understand the physical processes operating during conditions of northward interplanetary magnetic field (IMF), in situ measurements from the Dynamics Explorer-2 (low altitude) polar satellite and simultaneous observations from the auroral imager on the Dynamics Explorer-1 (high altitude) satellite were used to investigate the relationships between optical emissions, particle precipitation, and convective flows in the high-latitude ionosphere. Field aligned current and convective flow patterns during IMF north include polar cap arcs, the theta aurora or transpolar arc, and the 'horse-collar' aurora. The initial part of the study concentrated on the electrodynamics of auroral features in the horse-collar aurora, a contracted but thickened emission region in which the dawn and dusk portions can spread to very high latitudes, while the latter part focused on the evolution of one type of IMF north auroral pattern to another, specifically the quiet-time horse-collar pattern to a theta aurora. Sharber, J. R. Goddard Space Flight Center NAG5-1553; SwRI Proj. 15-4259...
Download or read book The High Latitude Ionosphere and its Effects on Radio Propagation written by R. D. Hunsucker and published by Cambridge University Press. This book was released on 2007-09-10 with total page 639 pages. Available in PDF, EPUB and Kindle. Book excerpt: A modern treatment of the physics and phenomena of the ionosphere, beginning with the basics of radio propagation and the use of radio techniques in ionospheric studies. Ample cross-referencing, chapter summaries and reference lists make this book an invaluable aid for graduate students, ionospheric physicists and radio engineers.
Download or read book Aeronomy of the Earth s Atmosphere and Ionosphere written by Mangalathayil Ali Abdu and published by Springer Science & Business Media. This book was released on 2011-02-26 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a multi-author treatise on the most outstanding research problems in the field of the aeronomy of the Earth’s atmosphere and ionosphere, encompassing the science covered by Division II of the International Association of Geomagnetism and Aeronomy (IAGA). It contains several review articles and detailed papers by leading scientists in the field. The book is organized in five parts: 1) Mesosphere-Lower Thermosphere Dynamics and Chemistry; 2) Vertical Coupling by Upward Propagating Waves; 3) Ionospheric Electrodynamics and Structuring; 4) Thermosphere- Ionosphere Coupling, Dynamics and Trends and 5) Ionosphere-Thermosphere Disturbances and Modeling. The book consolidates the progress achieved in the field in recent years and it serves as a useful reference for graduate students as well as experienced researchers.
Download or read book Multiscale Ionospheric Electrodynamics and Their Impacts on the Ionosphere thermosphere System written by Qingyu Zhu and published by . This book was released on 2022 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, multiscale ionospheric electrodynamics at different latitudinal regions and their impacts on the ionosphere and thermosphere (I-T) system have been studied in three aspects. Firstly, impacts of the vertical neutral dynamics on the dayside low and mid-latitude thermosphere have been evaluated using a non-hydrostatic model, Global Ionosphere Thermosphere Model (GITM), for the first time. It is found that the upward neutral wind increases the F-region neutral density, which plays an important role in balancing for the neutral density reduction associated with the divergent meridional wind in the equatorial region. The divergent meridional wind contributes to the formation of the equatorial thermosphere anomaly. Meanwhile, acoustic waves triggered by the vertical ion-neutral coupling processes are generated in the simulation. Secondly, this dissertation greatly advances the statistical knowledge of small-scale and mesoscale structures in high-latitude electrodynamical forcings, which is still lacking to date. Better understanding on small-scale and mesoscale structures in high-latitude electrodynamical forcings can improve the estimation of Joule heating, which is a critical pathway for the electromagnetic energy from the magnetosphere to deposit into the I-T system. On the one hand, the correlation between the electric field and the electron precipitation has been systematically quantified unprecedentedly. The overall anti-correlation results in a significant depression of Joule heating on the dusk side. On the other hand, the relationship between the field aligned currents (FACs) and electric fields has been studied. It is found that strong FACs do not necessary correspond to strong electric field on small scale and mesoscale. Nevertheless, mesoscale FACs have a non-negligible contribution to Joule heating. Thirdly, efforts have also been made to improve high-latitude electrodynamical forcing specifications and estimations of Joule heating. First, a new empirical model, ASHLEY, has been established based on measurements from the Defense Meteorological Satellite Program satellites. As compared with most existing empirical models, new features of ASHLEY include improvements in specifications of soft electron precipitations and electric field variabilities. Moreover, by coupling the electron precipitation component of ASHLEY (ASHLEY-A) into GITM, a real event study illustrates that advanced soft electron precipitation specifications can remarkably improve the data-model comparison of the F-region neutral density during geomagnetic storms. Finally, potential applications of the boundary-oriented binning method in the high-latitude empirical modeling have been explored. It is found that the boundary-oriented binning method can address the deficiency of the commonly used static binning method and further improve Joule heating estimations.
