An adaptive MHD method for global space weather simulations

Zeeuw, Darren L. De; Gombosi, T. I.; Groth, C. P. T.; Powell, Kenneth G.; Stout, Quentin F.

doi:10.1109/27.902224

Cited by 91 publications

(84 citation statements)

References 57 publications

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“…The model inputs are the solar wind driven outputs of the global MHD modeling provided in near real time by the Space Weather Modeling Framework (Tóth et al 2005(Tóth et al , 2012. 3D magnetic fields, as well as equatorial plasma density and temperature are obtained from the global magnetosphere SWMF GM/BATSRUS model (Powell et al 1999;De Zeeuw et al 2000) and 2D ionospheric height-integrated potentials are given by the ionospheric electrodynamics SWMF IE/RIM model (Ridley et al 2001. Equatorial plasma density and temperature are used to set the boundary conditions in the plasma sheet for electrons, which move inward in the provided magnetic and computed from the ionospheric potentials electric fields.…”

Section: Ring Current Electrons and Effects On Satellitesmentioning

confidence: 99%

Space Weather Effects Produced by the Ring Current Particles

2017

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One of the definitions of space weather describes it as the time-varying space environment that may be hazardous to technological systems in space and/or on the ground and/or endanger human health or life. The ring current has its contributions to space weather effects, both in terms of particles, ions and electrons, which constitute it, and magnetic and electric fields produced and modified by it at the ground and in space. We address the main aspects of the space weather effects from the ring current starting with brief review of ring current discovery and physical processes and the Dst-index and predictions of the ring current and storm occurrence based on it. Special attention is paid to the effects on satellites produced by the ring current electrons. The ring current is responsible for several processes in the other inner magnetosphere populations, such as the plasmasphere and radiation belts which is also described. Finally, we discuss the ring current influence on the ionosphere and the generation of geomagnetically induced currents (GIC).

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Section: Ring Current Electrons and Effects On Satellitesmentioning

confidence: 99%

Space Weather Effects Produced by the Ring Current Particles

2017

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“…[11] Simulations of the solar wind -driven magnetosphere-ionosphere system are run at the Community Coordinated Modeling Center (CCMC) [Bellaire, 2004] at NASA/Goddard Space Flight Center using the Block-Adaptive-Tree Solarwind Roe Upwind Scheme (BATSRUS) 3-D MHD code [Powell et al, 1999;De Zeeuw et al, 2000;Gombosi et al, 2000;Ridley et al, 2004;A. J. Ridley and G. Toth, unpublished data, 2008].…”

Section: Mhd Simulationsmentioning

confidence: 99%

Polar cap potential saturation, dayside reconnection, and changes to the magnetosphere

2009

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[1] Global MHD simulations of the Earth's magnetosphere using the Block-AdaptiveTree Solarwind Roe Upwind Scheme code at the Community Coordinated Modeling Center are run with a high-resolution dayside magnetopause and variable-resolution nearEarth regions to study the phenomena of polar cap saturation. In the simulations a resistive spot is maintained on the moving magnetopause to ensure that the correct dayside reconnection rate is obtained. The solar wind parameters are held fixed, and the ionospheric Pedersen conductivity is varied. Strong reduction of the cross-polar cap potential is observed, with modest increases in the cross-polar cap current, and no changes in the local and global reconnection rates. Changes in the magnetosphere associated with the saturation of the polar cap are explored: these include a weakening of the dayside magnetic field strength, an equatorward shift of the cusps, a flattening in Z of the closed field line region of the dayside magnetosphere, and a taillike stretching of the dipole field lines at the terminator. Measurements of the currents and voltages of the polar cap indicate that the solar wind acts like a current-limited voltage generator. A simple circuit model is analyzed using measurements from the MHD simulations, and physically reasonable values for the circuit elements are obtained. Nine models for polar cap saturation are assessed against the findings of the present study.

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“…This property is often preferred in applications where shocks are present as one can easily take advantage of special algorithms defined to deal with these issues (see e.g. [19,20,21,22,23]). …”

Section: Preliminariesmentioning

confidence: 99%