Transient Solar Wind–Magnetosphere–Ionosphere Interaction Associated with Foreshock and Magnetosheath Transients and Localized Magnetopause Reconnection

Nishimura, Y.; Wang, B.; Zou, Ying; Donovan, E.; Angelopoulos, V.; Moen, J.; Clausen, L. B. N.; Nagatsuma, Tsutomu

doi:10.1002/9781119509592.ch3

Cited by 4 publications

(4 citation statements)

References 72 publications

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“…Moreover, simulations by De Zeeuw et al ( 2004) calculated an answer time of around 10 min for the subauroral ionospheric electric field after a northward IMF inversion. The relaxation time and magnetosphere dynamics due to variations in SW dynamic pressure and temperature were analyzed by Eastwood et al (2015), Zhang & Zong (2020), Nishimura et al (2020), Shi et al (2020), showing a large variety of transient events that can last from seconds to one hundred minutes. Consequently, several response times exist that are linked to different magnetospheric processes, although the main response time in our study is the relaxation time required by the dayside magnetopause to reach a new equilibrium position, which is linked to the time required by the Alfvén wave to travel a distance of about the magnetopause standoff distance (Alfvén crossing time).…”

Section: Numerical Modelmentioning

confidence: 99%

MHD study of the planetary magnetospheric response during extreme solar wind conditions: Earth and exoplanet magnetospheres applications

Varela

Brun

Strugarek

et al. 2022

A&A

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Context. The stellar wind and the interplanetary magnetic field modify the topology of planetary magnetospheres. Consequently, the hazardous effect of the direct exposition to the stellar wind, for example, regarding the integrity of satellites orbiting the Earth or the habitability of exoplanets, depends upon the space weather conditions. Aims. The aim of the study is to analyze the response of an Earth-like magnetosphere for various space weather conditions and interplanetary coronal mass ejections. The magnetopause standoff distance, the open-close field line boundary, and plasma flows toward the planet surface are calculated. Methods. We used the magnetohydrodynamics code PLUTO in spherical coordinates to perform a parametric study of the dynamic pressure and temperature of the stellar wind as well as of the interplanetary magnetic field intensity and orientation. The range of the parameters we analyzed extends from regular to extreme space weather conditions, which is consistent with coronal mass ejections at the Earth orbit for the present and early periods of the solar main sequence. In addition, implications of sub-Afvénic solar wind configurations for the Earth and exoplanet magnetospheres were analyzed. Results. The direct precipitation of the solar wind at the Earth dayside in equatorial latitudes is extremely unlikely even during super coronal mass ejections. On the other hand, for early evolution phases during the solar main sequence, when the solar rotation rate was at least five times faster (<440 Myr), the Earth surface was directly exposed to the solar wind during coronal mass ejections. Today, satellites at high, geosynchronous, and medium orbits are directly exposed to the solar wind during coronal mass ejections because part of the orbit at the Earth dayside is beyond the nose of the bow shock.

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Section: Numerical Modelmentioning

confidence: 99%

MHD study of the planetary magnetospheric response during extreme solar wind conditions: Earth and exoplanet magnetospheres applications

Varela

Brun

Strugarek

et al. 2022

A&A

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“…The general purpose of this Special Collection is to document the Challenge event from 18 November 2015 and our understanding of the magnetospheric condition at the time, by gathering the various available data sets and their analyses to a common location. Note, however, that some studies related to the event, namely, Kitamura et al (2016) and Nishimura et al (2019), have already been published elsewhere. We wish to highlight the current state-of-the-art tools, the capabilities of different methods, and their limitations and uncertainties.…”

Section: The Special Collectionmentioning

confidence: 99%

The Challenges and Rewards of Running a Geospace Environment Modeling Challenge

et al. 2020

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Geospace Environment Modeling (GEM) is a community-driven, National Science Foundation-sponsored research program investigating the physics of the Earth's magnetosphere and its coupling to the solar wind and the atmosphere. This commentary provides an introduction to a Special Issue collating recent studies related to a GEM Challenge on kinetic plasma processes in the dayside magnetosphere during southward interplanetary magnetic field conditions. We also recount our experiences of organizing such a collaborative activity, where modelers and observers compare their results, that is, of the human side of bringing researchers together. We give suggestions on planning, managing, funding, and documenting these activities, which provide valuable opportunities to advance the field.Plain Language Summary Geospace Environment Modeling (GEM) is a community-driven, National Science Foundation-sponsored research program investigating the physics of the Earth's magnetosphere and its coupling to the solar wind and the atmosphere. An integral part of the program is the so-called "Challenges", which bring people together to compare models and observations in order to advance our understanding of the near-Earth space environment. This commentary provides an introduction to a Special Issue collating recent studies related to one such collaborative effort. We also share our experiences as early-career scientists organizing such an activity, to aid those who might take part in such endeavors in the future. We give suggestions on planning, managing, funding, and documenting the activities.

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“…Kitamura et al (2016) have analyzed the MMS and Geotail data for this event and estimated the X‐line location to be around

Z_{G S M} = 2 R_{E}

. Recently, Nishimura et al (2020) studied the X‐line spreading of this event. We use the MHD‐EPIC model (Daldorff et al, 2014) to simulate the challenge event in the present paper.…”

Section: Introductionmentioning

confidence: 99%

Magnetohydrodynamic With Embedded Particle‐In‐Cell Simulation of the Geospace Environment Modeling Dayside Kinetic Processes Challenge Event

Chen

Tóth

Hietala

et al. 2020

Earth and Space Science

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Transient Solar Wind–Magnetosphere–Ionosphere Interaction Associated with Foreshock and Magnetosheath Transients and Localized Magnetopause Reconnection

Cited by 4 publications

References 72 publications

MHD study of the planetary magnetospheric response during extreme solar wind conditions: Earth and exoplanet magnetospheres applications

MHD study of the planetary magnetospheric response during extreme solar wind conditions: Earth and exoplanet magnetospheres applications

The Challenges and Rewards of Running a Geospace Environment Modeling Challenge

Magnetohydrodynamic With Embedded Particle‐In‐Cell Simulation of the Geospace Environment Modeling Dayside Kinetic Processes Challenge Event

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