Global dynamics of the magnetosphere for northward IMF conditions

Трошичев, О. А.

doi:10.1016/0021-9169(90)90083-y

Cited by 21 publications

(14 citation statements)

References 74 publications

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“…In fact, such a reconnection process has been predicted previously by several phenomenological models [Cowley, 1983;Crooker, 1992;Dungey, 1963;Troshichev, 1990;Song and Russell, 1992;Russell, 1972;Reiff , 1982;Reiff andBurch, 1985;Kan Copyright 1999 by the American Geophysical Union.…”

Section: Introductionmentioning

confidence: 68%

“…However, these models differ greatly with respect to the resulting magnetic topology of the magnetosphere and treat for the most part only steady state situations. Cowley [1983] and Troshichev [1990] summarize the various possible magnetic topologies that may result from lobe reconnection. Some of these models predict a closed magnetosphere as a result of the merging process; however, closed models all require that reconnection occurs simultaneously and symmetrically both at the northern and southern lobes.…”

Section: Paper Number 1999ja900159mentioning

confidence: 99%

“…Under such conditions, magnetospheric activity ceases and the magnetosphere attains a ground state that sets the stage for new episodes of activity. While it is now well accepted that the magnetosphere has an open magnetic topology during periods of southward IMF [Cowley, 1980] (i.e., many magnetospheric field lines are connected with the interplanetary magentic field (IMF)), a completely different (namely, a closed) topology appears to be possible under northward IMF conditions [Cowley, 1983;Troshichev, 1990].…”

Section: Introductionmentioning

confidence: 99%

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Modeling the magnetosphere for northward interplanetary magnetic field: Effects of electrical resistivity

Raeder¹

1999

J. Geophys. Res.

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Section: Introductionmentioning

confidence: 68%

Section: Paper Number 1999ja900159mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling the magnetosphere for northward interplanetary magnetic field: Effects of electrical resistivity

Raeder¹

1999

J. Geophys. Res.

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“…In the course of convection, the closed magnetic field is assimilated by the magnetospheric LLBL (Song and Russell 1992). After that, it drifts along the flanks to the tail, and then returns to the reconnection point (Troshichev 1990). Due to this structure, a northward IMF generally creates a thick LLBL.…”

Section: Obliquely Northward Imfmentioning

confidence: 99%

Magnetosphere–Ionosphere Convection as a Compound System

Tanaka

2007

Space Sci Rev

119

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Convection is the most fundamental process in understanding the structure of geospace and disturbances observed in the magnetosphere-ionosphere (M-I) system. In this paper, a self-consistent configuration of the global convection system is considered under the real topology as a compound system. Investigations are made based on the M-I coupling scheme by analyzing numerical results obtained from magnetohydrodynamic (MHD) simulations which guarantee the self-consistency in the whole system under the Bv (magnetic field and velocity) paradigm. It is emphasized in the M-I coupling scheme that convection and field-aligned current (FAC) are different aspects of same physical process characterizing the open magnetosphere. Special attention is given in this paper to the energy supplying (dynamo) process that drives the FAC system. In the convection system, the dynamo must be constructed from shear motion together with plasma population regimes to steadily drive the convection. Convection patterns observed in the ionosphere are also the manifestation of achievement in global self-consistency. A primary approach to apply these concepts to the study of geospace is to consider how the M-I system adjusts the relative motion between the compressible magnetosphere and the incompressible ionosphere when responding to given solar-wind conditions. The above principle is also applicable for the study of disturbance phenomena such as the substorm as well as for the study of apparently unique processes such as the flux transfer event (FTE), the sudden commencement (SC), and the theta aurora. Finally, an attempt is made to understand the substorm as the extension of enhanced convection under the southward interplanetary magnetic field (IMF) condition.

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“…We have applied the assimilative mapping of ionospheric electrodynamics (AMIE) procedure [Richmond and Kamide, 1988;Richmond, 1992] to the data from these instru-(see review by McPherron [1991]), it is not Well understood for northward IMF. Recent reviews by Burke [1989], Troshichev [1990], and Moses and Reiff [1993] offer examples of many different convection configurations for northward !MF: single-cell and multicell, distorted cells and symmetric cells, ordered and unordered, and sunward and antisunward flow over the polar caps. Although numerous investigators have provided insights into this plethora of convection patterns and have related many of the variations in convection to variations in the IMF components, much controversy still exists over the apparent multimode nature of the patterns.…”

mentioning

confidence: 99%

Ionospheric convection response to slow, strong variations in a northward interplanetary magnetic field: A case study for January 14, 1988

Knipp¹,

Emery²,

Richmond³

et al. 1993

J. Geophys. Res.

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We analyze ionospheric convection pat terns over the polar regions during the passage of an interplanetary magnetic cloud on January 14, 1988, when the interplanetary magnetic field (IMF) rotated slowly in direction and had a large amplitude. Using the assirnilative mapping of ionospheric electrodynamics (AMIE) procedure, we combine simultaneous observations of ionospheric drifts and magnetic perturbations from many different instruments into consistent patterns of high-latitude electrodynamics, focusing on the period of northward IMF. By combining satellite data with ground-based observations, we have generated one of the most comprehensive data sets yet assembled and used it to produce convection maps for both hemispheres. We present evidence that a lobe convection cell was embedded within normal merging convection during a period when the IMF By and B, components were large and positive. As the IMF became predominantly northward, a strong reversed convection pattern (afternoon-to-morning potential drop of around 100 kV) appeared in the southern (

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Global dynamics of the magnetosphere for northward IMF conditions

Cited by 21 publications

References 74 publications

Modeling the magnetosphere for northward interplanetary magnetic field: Effects of electrical resistivity

Modeling the magnetosphere for northward interplanetary magnetic field: Effects of electrical resistivity

Magnetosphere–Ionosphere Convection as a Compound System

Ionospheric convection response to slow, strong variations in a northward interplanetary magnetic field: A case study for January 14, 1988

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