The hot zone in the outer plasmasphere of the earth

Безруких, В. В.; Gringauz, K. I.

doi:10.1016/0021-9169(76)90038-6

Cited by 46 publications

(25 citation statements)

References 4 publications

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“…This curious feature, if true, will be of significant impact in the consideration of the formation of the plasmapause and the ionospheric trough and the relationship between the two. The dashed curve represents a pass of the Prognoz satellite [Bezrukikh and Gringauz, 1976] for which the density at L = 4.2 is --•2 X t0: cm -a and the density at L -• 2 is --•8 X t0:, although the local time variation of the pass is not known. The temperatures measured along the pass are in good agreement with those of Figure 1.…”

Section: Equatorial Plasmaspherementioning

confidence: 99%

An equilibrium model of plasmaspheric composition and density

Chiu¹,

Luhmann²,

Ching³

et al. 1979

J. Geophys. Res

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We have constructed a model of plasmaspheric composition and density in the region bounded by the 500-km altitude level and by the dipole field line L = 5. We first discuss the collisionless kinetic theory model of quasi-neutral plasma distributions along a dipole field line under the gravitation field, the ambipolar diffusion electric field and the inhomogeneous magnetic field. A simpler fluid-equation model of the plasma distribution under the influence of the above force fields is shown to be able to incorporate effects of plasmasphere thermal structure. With O +, H +, and He + densities at 500 km as input boundary values and with a phenomenological thermal structure of the plasmasphere abstracted from Ogo 5, Prognoz, and S3-3 satellite data, we show that the plasma density distributions in the fluid-equation model are consistent with the densities derived from in situ satellite measurements and from whistler observations, both in the topside ionosphere and in the outer plasmasphere.has not been systematically constructed and confronted with observations. A fluid model of ionospheric dynamics with

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Section: Equatorial Plasmaspherementioning

confidence: 99%

An equilibrium model of plasmaspheric composition and density

Chiu¹,

Luhmann²,

Ching³

et al. 1979

J. Geophys. Res

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“…This process has been employed by Cornwall et al [1971] as a major physical mechanism which is able to drive stable auroral red arc emissions during the recovery phase of a storm. Measurements taken aboard the Prognoz satellites have revealed a so‐called hot zone near the plasmapause where the temperature of core plasma ions can reach tens of thousands of degrees [ Bezrukikh and Gringauz , 1976; Gringauz , 1983, 1985]. In order to explain this temperature enhancement Galeev [1975] has suggested to take into account the induced scattering of EMIC waves by plasmaspheric protons.…”

Section: Introductionmentioning

confidence: 99%

Self‐consistent model of magnetospheric ring current and propagating electromagnetic ion cyclotron waves: Waves in multi‐ion magnetosphere

et al. 2006

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[1] The further development of a self-consistent theoretical model of interacting ring current ions and electromagnetic ion cyclotron waves (Khazanov et al., 2003) is presented. In order to adequately take into account wave propagation and refraction in a multi-ion magnetosphere, we explicitly include the ray tracing equations in our previous self-consistent model and use the general form of the wave kinetic equation. This is a major new feature of the present model and, to the best of our knowledge, the ray tracing equations for the first time are explicitly employed on a global magnetospheric scale in order to self-consistently simulate the spatial, temporal, and spectral evolution of the ring current and of electromagnetic ion cyclotron waves. To demonstrate the effects of EMIC wave propagation and refraction on the wave energy distribution and evolution, we simulate the May 1998 storm. The main findings of our simulation can be summarized as follows. First, owing to the density gradient at the plasmapause, the net wave refraction is suppressed, and He + -mode grows preferably at the plasmapause. This result is in total agreement with previous ray tracing studies and is very clearly found in presented B field spectrograms. Second, comparison of global wave distributions with the results from another ring current model reveals that this new model provides more intense and more highly plasmapause-organized wave distributions during the May 1998 storm period. Finally, it is found that He + -mode energy distributions are not Gaussian distributions and most important that wave energy can occupy not only the region of generation, i.e., the region of small wave normal angles, but all wave normal angles, including those to near 90°. The latter is extremely crucial for energy transfer to thermal plasmaspheric electrons by resonant Landau damping and subsequent downward heat transport and excitation of stable auroral red arcs.Citation: Khazanov, G. V., K. V. Gamayunov, D. L. Gallagher, and J. U. Kozyra (2006), Self-consistent model of magnetospheric ring current and propagating electromagnetic ion cyclotron waves: Waves in multi-ion magnetosphere,

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“…This process has been employed by Cornwall et al [1971] as a major physical mechanism which is able to drive SAR arc emissions during the recovery phase of the storm. Measurements taken aboard the Prognoz satellites have revealed near plasmapause a so‐called hot zone where the temperature of the core plasma ions can reach tens of thousands of degrees [ Bezrukikh and Gringauz , 1976; Gringauz , 1983, 1985]. In order to explain such temperature enhancement, the mechanism of nonlinear interaction of the thermal plasmaspheric ions and EMIC waves has been employed by Gorbachev et al [1992].…”

Section: Introductionmentioning

confidence: 99%

Self‐consistent model of magnetospheric ring current and electromagnetic ion cyclotron waves: The 2–7 May 1998 storm

2003

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[1] A complete description of a self-consistent model of magnetospheric ring current interacting with electromagnetic ion cyclotron waves is presented. The model is based on the system of two kinetic equations; one equation describes the ring current ion dynamics, and another equation describes the wave evolution. The effects on ring current ions interacting with electromagnetic ion cyclotron waves and back on waves are considered self-consistently by solving both equations on a global magnetospheric scale under nonsteady state conditions. The developed model is employed to simulate the entire 2-7 May 1998 storm period. First, the trapped number fluxes of the ring current protons are calculated and presented along with comparison with the data measured by the threedimensional hot plasma instrument Polar/HYDRA. Incorporating in the model the waveparticle interaction leads to much better agreement between the experimental data and the model results. Second, examining of the wave (MLT, L shell) distributions produced by the model during the storm progress reveals an essential intensification of the wave emission about 2 days after the main phase of the storm. This result is well consistent with the earlier ground-based observations. Finally, the theoretical shapes and the occurrence rates of the wave power spectral densities are studied. It is found that about 2 days after the storm's main phase on 4 May, mainly non-Gaussian shapes of power spectral densities are produced.INDEX TERMS: 2736 Magnetospheric Physics: Magnetosphere/ ionosphere interactions; 2753 Magnetospheric Physics: Numerical modeling; 2778 Magnetospheric Physics: Ring current; 2431 Ionosphere: Ionosphere/magnetosphere interactions (2736); 2483 Ionosphere: Wave/particle interactions; KEYWORDS: ring current, wave-particle interaction, numerical modeling, magnetosphere-inner Citation: Khazanov, G. V., K. V. Gamayunov, and V. K. Jordanova, Self-consistent model of magnetospheric ring current and electromagnetic ion cyclotron waves:

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The hot zone in the outer plasmasphere of the earth

Cited by 46 publications

References 4 publications

An equilibrium model of plasmaspheric composition and density

An equilibrium model of plasmaspheric composition and density

Self‐consistent model of magnetospheric ring current and propagating electromagnetic ion cyclotron waves: Waves in multi‐ion magnetosphere

Self‐consistent model of magnetospheric ring current and electromagnetic ion cyclotron waves: The 2–7 May 1998 storm

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