Magnetohydrodynamic Waves In The Ionosphere
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Author | : Leonid S. Alperovich |
Publisher | : Springer Science & Business Media |
Total Pages | : 437 |
Release | : 2007-12-05 |
Genre | : Science |
ISBN | : 1402066376 |
Download Hydromagnetic Waves in the Magnetosphere and the Ionosphere Book in PDF, Epub and Kindle
Here is a fascinating text that integrates topics pertaining to all scales of the MHD-waves, emphasizing the linkages between the ULF-waves below the ionosphere on the ground and magnetospheric MHD-waves. It will be most helpful to graduate and post-graduate students, familiar with advanced calculus, who study the science of MHD-waves in the magnetosphere and ionosphere. The book deals with Ultra-Low-Frequency (ULF)-electromagnetic waves observed on the Earth and in Space.
Author | : H. H. C. CHANG |
Publisher | : |
Total Pages | : 1 |
Release | : 1961 |
Genre | : |
ISBN | : |
Download Magnetohydrodynamic Waves in the Ionosphere Book in PDF, Epub and Kindle
The ten conditions which must be satisfied before simple magnetohydrodynamic (MHD) waves can propagate in a plasma are enumerated and discussed. Assuming that all but the tenth condition are satisfied throughout the ionosphere and that the earth is a perfectly conducting plane, the propagation of MHD waves in a horizontally stratified ionosphere composed of electrons, ions, and neutrals is studied when an arbitrarily oriented plane wave is obliquely incident at the lower edge of the ionosphere. The equations governing the behavior of the field quantities are cast in the coupled form suitable for computation by means of a high-speed modern computer, but no numerical results are obtained because of the prohibitive amount of work necessary to solve the equations in the case of oblique incidence. The velocity of MHD waves is formulated. (Author).
Author | : Tom Van Doorsselaere |
Publisher | : Frontiers Media SA |
Total Pages | : 170 |
Release | : 2020-02-27 |
Genre | : |
ISBN | : 2889635252 |
Download Magnetohydrodynamic Waves in the Solar Atmosphere: Heating and Seismology Book in PDF, Epub and Kindle
Author | : A.D.M. Walker |
Publisher | : CRC Press |
Total Pages | : 549 |
Release | : 2019-09-12 |
Genre | : Science |
ISBN | : 1420034006 |
Download Magnetohydrodynamic Waves in Geospace Book in PDF, Epub and Kindle
Solar-terrestrial physics deals with phenomena in the region of space between the surface of the Sun and the upper atmosphere of the Earth, a region dominated by matter in a plasma state. This area of physics describes processes that generate the solar wind, the physics of geospace and the Earth's magnetosphere, and the interaction of magnetospheri
Author | : David J. Knudsen |
Publisher | : |
Total Pages | : 440 |
Release | : 1990 |
Genre | : Ionosphere |
ISBN | : |
Download Alfvén Waves and Static Fields in Magnetosphere/ionosphere Coupling Book in PDF, Epub and Kindle
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 | : Sheldon L. Kahalas |
Publisher | : |
Total Pages | : 161 |
Release | : 1966 |
Genre | : |
ISBN | : |
Download Investigation of Magnetohydrodynamic Wave Propagation in the Ionosphere and Collisional Effects of Positive Ions with Neutral Particles Book in PDF, Epub and Kindle
The propagation of magnetohydrodynamic waves above the E region of the ionosphere is treated with the aim of developing a computer program to predict the space-time history of magnetohydrodynamic waves generated by a given source. Changes in ionization density as a function of altitude and the geomagnetic field in the form of a magnetic dipole are incorporated. The Carovillano-McClay method of solution (expansion in vector spherical harmonics) was used. This leads to a set of coupled, second order, ordinary, differential equations to solve. Boundary conditions, for the case where the ionospheric plasma is treated as a cavity bounded by vacuum, are derived. Some preliminary numerical calculations, for a source consisting of an axisymmetric ring current located over the magnetic pole, are presented. The coupling of wave modes due to the Hall Effect is discussed. The physics of positive ion-neutral particle collisions, important in the propagation of magnetohydrodynamic waves in the E region, has been considered from the point of view of possible modifications to the hydrodynamic equations. Corrections to the hydrodynamic moment equations due to space-time correlation effects have been investigated by the theory of Green and found to be small. Corrections to the adiabatic pressure relations due to the interaction of the positive ions with the neutrals is considered and found to be significant for the propagation of magnetohydrodynamic waves through the E layer. Various forms for the correction terms as they effect the momentum equations have been derived but no detailed calculations are carried out. (Author).
Author | : John Ashworth Ratcliffe |
Publisher | : |
Total Pages | : 228 |
Release | : 1959 |
Genre | : Ionosphere |
ISBN | : |
Download The Magneto-ionic Theory and Its Applications to the Ionosphere Book in PDF, Epub and Kindle
Author | : H. Poeverlein |
Publisher | : |
Total Pages | : 20 |
Release | : 1965 |
Genre | : Electromagnetic waves |
ISBN | : |
Download Coupling of Magnetohydrodynamic Waves in Stratified Media Book in PDF, Epub and Kindle
Author | : Bernard Roberts |
Publisher | : Cambridge University Press |
Total Pages | : 529 |
Release | : 2019-07-18 |
Genre | : Mathematics |
ISBN | : 1108427669 |
Download MHD Waves in the Solar Atmosphere Book in PDF, Epub and Kindle
Develops a fresh mathematical approach to coronal seismology, explaining oscillatory phenomena by drawing upon original research and complex modelling techniques.
Author | : John Ashworth Ratcliffe |
Publisher | : CUP Archive |
Total Pages | : 280 |
Release | : 1972-06-29 |
Genre | : Science |
ISBN | : 9780521083416 |
Download An Introduction to Ionosphere and Magnetosphere Book in PDF, Epub and Kindle