GEM: Global versus Local Control of Solar Wind-Magnetospheric Coupling

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项目编号	1602769
	GEM: Global versus Local Control of Solar Wind-Magnetospheric Coupling
	Paul Cassak
主持机构	West Virginia University Research Corporation
项目开始年	2017
	2017-08-15
项目结束日期	2020-07-31
资助机构	US-NSF
项目类别	Continuing grant
项目经费	89708(USD)
国家	美国
语种	英语
英文摘要	Magnetic reconnection is basically the breaking and reconfiguring of magnetic field lines so that the Earth's and interplanetary magnetic field lines (IMF) become interconnected for a time. In this process, magnetic energy is converted into heat and kinetic energy of charged particles and drives the circulation of plasmas and electromagnetic energy through the magnetosphere. A debate is ongoing in the space physics community about whether the integrated dayside magnetic reconnection rate is controlled by local plasma conditions at the reconnection site (called local-control) or whether the reconnection rate is controlled by the solar wind electric field (called global-control). The primary goal of the work is to use global MHD simulations to address this controversy. Knowledge of what controls the rate of dayside magnetic reconnection is critical to understanding how the geospace system works and, ultimately, improving space weather prediction of value to a technology-dependent society. Global magnetospheric simulations with selected changes to the local plasma parameters in the reconnection region (uniform resistivity, localized resistivity, or the Hall term) will be performed with identical solar wind conditions for a range of orientations of the IMF to determine whether the change in local reconnection physics alters the global magnetospheric response. A secondary goal is to determine how well 2D local reconnection models describe magnetic reconnection. Data-model comparisons will be conducted using satellite data to test the applicability of the modeling results to Earth's magnetosphere.
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文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/71519
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Paul Cassak.GEM: Global versus Local Control of Solar Wind-Magnetospheric Coupling.2017.