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Space Plasma and Magnetospheric Physics at Southampton (2021-4)

南安普顿的空间等离子体和磁层物理（2021-4）

基本信息

批准号：
ST/V000942/1
负责人：
Robert Fear
金额：
$ 54.25万
依托单位：
University of Southampton
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2021
资助国家：
英国
起止时间：
2021 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=ST%2FV000942%2F1
关键词：
Space Plasma Magnetospheric Physics Southampton

项目摘要

This Consolidated Grant application proposes research which will be undertaken at the University of Southampton in three related projects, all of which are connected to the manner in which the Earth's magnetosphere and bow shock respond to the solar wind.The first project will address questions about how the Earth's magnetosphere responds to the solar wind on a large scale. The nature of this interaction depends on the orientation of the interplanetary magnetic field, which is associated with the solar wind. This orientation is highly changeable, but can be referred to as 'northward' or 'southward'. We will use satellite observations to test mechanisms that have been advocated for previously observed complex structure in the magnetosphere during periods when the interplanetary magnetic field is 'northward', to hunt for the signature of that structure's predicted interaction with the solar wind, and to investigate equivalent structure present in global simulations of the magnetosphere.The second project will investigate how a process called 'turbulence' affects shock wave in plasmas. Turbulence is a process whereby chaotic flow causes energy to be transferred from large scales (e.g. the bulk flow of the solar wind) down to small scales (heating individual particles). A shock wave is formed when an obstacle (such as a magnetosphere) is present in a fast-flowing plasma (such as the solar wind). We will use a combination of observations from three satellite missions: MMS, which makes measurements of the plasma environment near Earth in unprecedented detail, and Parker Solar Probe & Solar Orbiter, both of which make measurements of the solar wind closer to the Sun than ever possible before. By combining spacecraft data with high-performance computational simulations, we will determine how the turbulence process and other solar wind transients affect the structure of plasma shock waves.The final project will investigate the link between plasma turbulence observed in the magnetosphere and turbulent structure that is present in the aurora (northern lights) when the aurora is observed on very fine scales. The plasma turbulence will be observed using measurements from MMS (as in Project 2, but this time looking at a different region of the magnetosphere), and the auroral turbulence will be observed using a unique auroral instrument called ASK, which is operated by the University of Southampton. ASK is capable of observing structure in the aurora down to scales of tens of metres, and changes on timescales down to fractions of a second - capabilities that are unique to ASK.

这项综合赠款申请提出了将在南安普顿大学进行的三个相关项目的研究，所有这些项目都与地球磁层和弓形激波对太阳风的反应方式有关，第一个项目将解决地球磁层如何对太阳风作出大规模反应的问题。这种相互作用的性质取决于行星际磁场的方向，这与太阳风有关。这个方向是高度可变的，但可以被称为“向北”或“向南”。我们将利用卫星观测来测试以前在行星际磁场“向北”期间观察到的磁层复杂结构所倡导的机制，以寻找该结构预测与太阳风相互作用的特征，并研究全球磁层模拟中存在的等效结构。第二个项目将研究一种称为“湍流”的过程影响等离子体中的冲击波。湍流是一个过程，其中混沌流导致能量从大尺度（例如太阳风的整体流动）转移到小尺度（加热单个粒子）。当障碍物（如磁层）出现在快速流动的等离子体（如太阳风）中时，就会形成冲击波。我们将使用来自三个卫星任务的观测组合：MMS，它以前所未有的细节测量地球附近的等离子体环境，以及帕克太阳探测器和太阳轨道飞行器，这两个卫星都比以往任何时候都更接近太阳风的测量。通过将航天器数据与高性能计算模拟相结合，我们将确定湍流过程和其他太阳风瞬变如何影响等离子体冲击波的结构，最后一个项目将研究在极细尺度上观测极光时，在磁层中观测到的等离子体湍流与极光（北方光）中存在的湍流结构之间的联系。等离子体湍流将使用MMS的测量结果进行观测（与项目2一样，但这次观测的是磁层的不同区域），极光湍流将使用一种独特的极光仪器ASK进行观测，该仪器由南安普顿大学操作。ASK能够观测极光中几十米尺度的结构，并在时间尺度上变化到几分之一秒-这是ASK独有的能力。

项目成果

期刊论文数量（8）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

3D GUMICS Simulations of Northward IMF Magnetotail Structure

DOI：
10.1029/2023ja031317
发表时间：
2023-07
期刊：
Journal of Geophysical Research: Space Physics
影响因子：
0
作者：
L. J. Fryer;R. Fear;I. Gingell;J. Coxon;M. Palmroth;S. Hoilijoki;P. Janhunen;A. Kullen;P. Cassak
通讯作者：
L. J. Fryer;R. Fear;I. Gingell;J. Coxon;M. Palmroth;S. Hoilijoki;P. Janhunen;A. Kullen;P. Cassak

Exploring solar-terrestrial interactions via multiple imaging observers

DOI：
10.1007/s10686-021-09784-y
发表时间：
2021-08
期刊：
Experimental Astronomy
影响因子：
3
作者：
G. Branduardi‐Raymont;Matthieu Berthomier;Y. Bogdanova;J. Carter;M. R. Collier;A. Dimmock;Malcolm Dunlop;R. Fear;C. Forsyth;B. Hubert;E. Kronberg;K. Laundal;Mark Lester;S. Milan;K. Oksavik;N. Østgaard;M. Palmroth;F. Plaschke;F. Porter;I. J. Rae;A. Read;A. Samsonov;S. Sembay;Y. Shprits;D. Sibeck;Brian M. Walsh;M. Yamauchi
通讯作者：
G. Branduardi‐Raymont;Matthieu Berthomier;Y. Bogdanova;J. Carter;M. R. Collier;A. Dimmock;Malcolm Dunlop;R. Fear;C. Forsyth;B. Hubert;E. Kronberg;K. Laundal;Mark Lester;S. Milan;K. Oksavik;N. Østgaard;M. Palmroth;F. Plaschke;F. Porter;I. J. Rae;A. Read;A. Samsonov;S. Sembay;Y. Shprits;D. Sibeck;Brian M. Walsh;M. Yamauchi

Fine-Scale Electric Fields and Joule Heating From Observations of the Aurora

极光观测中的精细电场和焦耳热