V2EX magnetosheath

Magnetosheath

定义 Definition

magnetosheath(磁鞘):行星磁层外侧、弓形激波(bow shock)与磁层顶(magnetopause)之间的一层区域。这里的太阳风等离子体在穿过弓形激波后被减速、加热并变得更湍动,磁场也会被压缩与扭曲;它是太阳风与行星磁层相互作用的重要“过渡带”。(该词主要用于空间物理与空间天气语境。)

发音 Pronunciation (IPA)

/mnitiθ/

例句 Examples

The spacecraft crossed the magnetosheath before reaching Earth’s magnetopause.
航天器在到达地球磁层顶之前先穿过了磁鞘。

During strong solar wind conditions, turbulence in the magnetosheath can intensify and transfer energy toward the magnetosphere, affecting space weather near Earth.
在强太阳风条件下,磁鞘中的湍动可能增强,并将能量传递到磁层,从而影响近地空间天气。

词源 Etymology

magnetosheath 由 **magneto-**(与“磁/磁场”有关的前缀,源自希腊语 magnetis 一类词根传统)+ sheath(“鞘、套”,指包覆在外的一层)组成,字面意思是“磁(层)的外鞘/包层”。该命名形象地强调它位于磁层外部、像“外套”一样包围在磁层前方的一层受扰动等离子体区域。

相关词 Relaed Words

文学与典籍 Literary Works

  • Introduction to Space Physics(Kivelson & Russell 编)在讨论太阳风磁层相互作用时频繁使用 magnetosheath
  • Magnetohydrodynamics of the Sun(Eric Priest)涉及太阳风与行星空间等离子体环境时会出现该术语。
  • NASA/ESA 任务论文与报告(如 Cluster、THEMIS、MMS 相关文献)常以 magnetosheath 描述观测到的磁鞘湍动、边界层与能量传输过程。
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