气候变化领域集成服务门户(CCPortal): Formation and Evolution of the Large-Scale Magnetic Fields in Venus' Ionosphere: Results From a Three Dimensional Global Multispecies MHD Model

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DOI	10.1029/2020GL087593
	Formation and Evolution of the Large-Scale Magnetic Fields in Venus' Ionosphere: Results From a Three Dimensional Global Multispecies MHD Model
	Ma Y.; Toth G.; Nagy A.; Luhmann J.; Russell C.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:11
英文摘要	Large-scale magnetic fields have been observed in Venus' ionosphere by both the Pioneer Venus Orbiter (PVO) and Venus Express spacecraft. In this study, we examine the formation and evolution of the large-scale magnetic field in the Venus ionosphere using a sophisticated global multispecies Magnetohydrodynamics (MHD) model that has been developed for Venus (Ma et al., 2013, https://doi.org/10.1029/2012JA018265). A time-dependent model run is performed under varying solar wind dynamic pressure. Based on model results, we find that (1) the initial response of the induced magnetosphere is fast (~min), (2) a large-scale magnetic field gradually forms in the ionosphere when the solar wind dynamic pressure suddenly exceeds the ionospheric thermal pressure, (3) both the penetration and decay of the large-scale magnetic field in the ionosphere are slow (~hr), and (4) the ion escape rate has a nonlinear response to the change of solar wind dynamic pressure. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Ionosphere; Ionospheric measurement; Magnetosphere; Orbits; Solar wind; Formation and evolutions; Induced magnetospheres; Non-linear response; Pioneer Venus Orbiters; Solar wind dynamic pressure; Thermal pressure; Time-dependent models; Venus Express; Magnetohydrodynamics; ionosphere; magnetic field; magnetosphere; penetration; solar power; solar wind; three-dimensional modeling; time dependent behavior
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170303
作者单位	Department of Earth, Planetary, and Space Sciences, University of California Los Angeles, Los Angeles, CA, United States; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States; Space Sciences Laboratory, University of California, Berkeley, CA, United States
推荐引用方式 GB/T 7714	Ma Y.,Toth G.,Nagy A.,et al. Formation and Evolution of the Large-Scale Magnetic Fields in Venus' Ionosphere: Results From a Three Dimensional Global Multispecies MHD Model[J],2020,47(11).
APA	Ma Y.,Toth G.,Nagy A.,Luhmann J.,&Russell C..(2020).Formation and Evolution of the Large-Scale Magnetic Fields in Venus' Ionosphere: Results From a Three Dimensional Global Multispecies MHD Model.Geophysical Research Letters,47(11).
MLA	Ma Y.,et al."Formation and Evolution of the Large-Scale Magnetic Fields in Venus' Ionosphere: Results From a Three Dimensional Global Multispecies MHD Model".Geophysical Research Letters 47.11(2020).