Constraining the magnetic connection of Jupiter's and Saturn's ring planes with their stratospheres

限制木星和土星环平面与其平流层的磁连接

• 批准号: 169821322
• 负责人: Dr. Paul Hartogh
• 金额: --
• 依托单位: Max-Planck-Institut für Sonnensystemforschung (MPS)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/169821322?language=en
• 关键词: Constraining; magnetic; connection; Jupiter; Saturn

Saturn’s spin-symmetric magnetic field provides a natural coordinate system mapping any latitude of the middle atmosphere to corresponding locations in the ring plane. So-called conjugate latitudes and ring-plane conjugates have been proposed for the first time by Connerney in 1982. His Z3 model provides a quantitative description of connection between mid atmosphere latitudes with locations in the ring plane. High charge-to-mass-ratio particles which are confined to motion along field lines are subject to mass transport from the ring plane into the neutral atmosphere and may therefore lead to ring erosion and mass loss. This mass transport (mainly water) would also play an important role in the chemistry of the middle atmosphere (oxygen supply) and would be a tracer for constraining the meridional circulation. Up to now there is no direct proof of the possible transport of water and the related mechanisms of its distribution. Instead variations in the haze density of the lower stratosphere have been used to constrain the mass transport. This is a very indirect method, since it requires insight into the microphysics of condensation nuclei of unknown nature and leaves of lot of space for speculations about the fate of the water transported from the rings into the middle atmosphere. Herschel will for the first time provide highly resolved observations of the vertical profile of water vapour in the middle atmospheres and its meridional distribution in late 2009 / early 2010 and therefore provide a strong constraint for the proposed connection processes. It is the goal of this application to analyse these observations with respect to the magnetic ring plane – middle atmosphere connections.

土星的自旋对称磁场提供了一个自然坐标系，将中间大气的任何纬度映射到环平面中的相应位置。康纳尼（Connerney）在1982年首次提出了所谓的共轭纬度和环形平面缀合物。他的Z3模型提供了对中大气中与环平面位置之间的连接的定量描述。沿野外线限制的高电荷到质量比率颗粒会从环平面进入中性气氛，因此可能导致环侵蚀和质量损失。这种大规模运输（主要是水）也将在中间大气的化学（氧气供应）中发挥重要作用，并且将是恢复子午循环的示踪剂。到目前为止，还没有直接证明水的运输及其分布的相关机制。取而代之的是，平流层的雾度密度的变化已被用于限制质量转运。这是一种非常间接的方法，因为它需要深入了解未知性质和叶子的凝结核的微物理学，以便猜测从环向中间大气中运送的水的命运。 Herschel将首次对中间大气中水蒸气的垂直曲线及其在2009年末 / 2010年初的子午线分布提供高度解决的观察结果，因此为拟议的连接过程提供了强烈的限制。该应用程序是针对磁环平面 - 中间气氛连接分析这些观察结果的目标。