4 edition of Two-stream modeling of plasmaspheric refilling found in the catalog.
Two-stream modeling of plasmaspheric refilling
S. M. Guiter
by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va
Written in English
|Other titles||Two stream modeling of plasmaspheric refilling.|
|Statement||S.M. Guiter, T.I. Gombosi and C.E. Rasmussen.|
|Series||[NASA contractor report] -- NASA CR-199997., NASA contractor report -- NASA CR-199997.|
|Contributions||Gombosi, Tamás I., Rasmussen, C. E., United States. National Aeronautics and Space Administration.|
|The Physical Object|
The two-stream model, including energy equation and interstream collisions, shows that the refilling of the flux tube is not monotonic in time. Up to about five hours in the refilling time, all the physical quantities including density, flow velocity and temperature. Right: A model (Carpenter and Anderson, ) calculation of the radial density gradient at the plasmapause. Plasmaspheric density profiles The plasmapause position can be studied both by using in situ satellite measurements, or by ground-based measurements and .
These pictures show the plasmasphere model from GCPM They each have a model of Earth in the center surrounded by different changing colors that represent the density of the plasmasphere. The images also have different Kp values. What is Kp? Kp is the planetary k index. Augmented Empirical Models of Plasmaspheric Density and Electric Field Using IMAGE and CLUSTER Data Space Sci. Rev., (), Plasmaspheric depletion, refilling, and plasmapause dynamics: A coordinated ground-based and IMAGE satellite study List of the references quoted in this ( kb) Publications on Plasmaspheric Models.
We have developed a time-dependent model of the plasmasphere to evaluate the spatial variation of the Coulomb lifetime of ring current ions. Coulomb collision has been considered to be one of major loss processes of the ring current ions interacted with the thermal plasma in the plasmasphere. The distribution of plasmaspheric density is derived by a Cited by: Items where NERC Author is "Meredith, Nigel" Up a level: Global model of plasmaspheric hiss from multiple satellite observations. Refilling of the slot region between the inner and outer electron radiation belts during geomagnetic storms.
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Plasmaspheric refilling on an L = 4 flux tube was studied by using a time-dependent, hydrodynamic plasmaspheric flow model in which the ion streams from the two hemispheres are treated as distinct. a two-stream version of the plasmaspheric flow model, which we developed [Guiter et al., ]. This is a time-dependent hydrodynamic model in which the H* and O* continuity, mo- mentum, and energy equations and the electron energy equation are solved along a closed dipole field line.
The temperatures are assumed to be isotropic. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle.
Plasmaspheric refilling on an L = 4 flux tube was studied by using a time-dependent, hydrodynamic plasmaspheric flow model in which the ion streams from the two hemispheres are treated as distinct fluids.
Two-stream modeling of plasmaspheric refilling. Plasmaspheric refilling on an L = 4 flux tube was studied by using a time-dependent, hydrodynamic plasmaspheric flow model in which the ion streams from the two hemispheres are treated as distinct fluids.
In the model the continuity, momentum, and energy equations of a two-ion (O(+) and H. As a result, the modeling of plasmaspheric refilling after a storm is an important problem. Over the last several decades, a multitude of studies have been undertaken to model and quantify plasma transport between the ionosphere Two-stream modeling of plasmaspheric refilling book the plasmasphere and these studies have led to the development of several ionosphere‐plasmasphere coupling by: 1.
and the book by Khazanov). As part of this puzzle, plasmaspheric refilling will require coordinated observations of ionospheric and magnetospheric conditions in combination with theoretical modeling before a functional understanding is achieved.
While much has been learned, many questions by: 7. two-stream version of the Singh et al. model and ap- plied it to refilling on an L = 4 field line, but with T, = Ti. Results were given both with and without H+-H+ collisions. There was not much difference between these two cases, but the.
Augmented Empirical Models of Plasmaspheric Density and Electric Field Using IMAGE and CLUSTER Data P. Song, J.L. Green, S.F. Fung, V.M. Vasyliunas, D.L. Gallagher, B.R. Sandel, Plasmaspheric mass loss and refilling as a result of a magnetic storm.
Augmented Empirical Models of Plasmaspheric Density and Electric Field Using IMAGE and Cited by: Galperin et al. () developed a time-dependent convection-driven plasmaspheric density model to describe plasmaspheric thermal density profiles. The model is based on the convection drift and refilling rate prehistory calculated for a particular flux tube, and its most important ingredient is a realistic convection model for disturbed by: The two-stream version was used to study plasmaspheric refilling on an L = 4 flux tube following a density depletion; the initial H^+ density profiles were chosen to be similar to those used by Rasmussen and Schunk ().
Measurement and modeling of the refilling plasmasphere during Article (PDF Available) in Journal of Geophysical Research: Space Physics (3):n/a-n/a March with 84 Reads.
A model of time-dependent me-stream interhemispheric plasma flow is used to investigate plasmaspheric refilling. In the model the coupled time-dependent hydrodynamic equations (continuity, momentum and energy) of a two-ion (H + and O+), quasi-neutral, currentless plasma are solved for a closed geomagnetic field line.
Flows on a plasmaspheric flux tube were modelled, using a fully interhemispheric model in which no low speed assumptions are made. The model is time-dependent and hydrodynamic; it is an adaptation, for closed dipolar field lines, of a polar wind model developed by Gombosi et al.
Both one- and two-stream versions were developed. Abstract. It is important to develop a comprehensive kinetic theory of superthermal electron transport that is equally valid in the ionosphere and in the plasmasphere, and that self-consistently couples the conjugate magnetospheric by: 2.
A two-dimensional model of the plasmasphere: refilling time constants Craig E. Rasmussen, Steven M. Guiter and Steven G. Thomas The plasmaspheric model has been used to examine the time it takes for the plasmasphere to refill after it has been depleted by a magnetic storm.
The time it takes for the plasmasphere. Plasmaspheric Models GCPM Version Meridian Swing To learn more about the images above, click the images. "Below is at least a partial list of current plasmaspheric models.
These specific models have been recognized in the academic community, but there are still many other plasmaspheric models. Modeling the properties of plasmaspheric hiss: 2. Dependence on the plasma density distribution Lunjin Chen,1 Jacob Bortnik,1 Wen Li,1 Richard M.
Thorne,1 and Richard B. Horne2 Received 26 September ; revised 1 February ; accepted 1. Lemaire, Plasma distribution models in a rotating magnetic dipole and refilling of plasmaspheric flux tubes, Physics of Fluids B: Plasma Physics, 1, 7, (), (). Crossref Peter Stubbe, Theory of electrostatic waves in an E region plasma, 1.
The model uses magnetospheric magnetic field model (Tsyganenko, ) and the ionospheric convection electric field model (Sojka et al., ) and cold plasma refilling rates of Carpenter and Anderson (). It is used to understand the role of subauroral ion drifts on the formation of density troughs during the period of high magnetic by:.
Both cases are treated by a two-stream model. In the late type of flow, the early-time refilling shows a relaxation type of oscillation, which is driven by the large-scale interactions between the two identical streams.
After this early stage, the resulting temperature structure shows some interesting : Nagendra Singh, P. Craven, D. G. Torr, P. G. Richards.• Notably, Krall and Huba () find refilling within a factor of 2 from their modeling. with SAMI3 at L=2,3, but diverges.
at L=5 where SAMI3 is low by a. factor of 5. Is the problem with. models reaching observed refilling. rates greater at larger L?2. Plasmaspheric Model  The FLIP model has been developed over a period of more than 20 years and has been extensively used in ionospheric and plasmaspheric modeling [Richards et al., ].The model solves the continuity and momentum equations for major ion O+,H+, and minor ion He+ and N+ along a tilted dipole field line from km altitude in.