DOI: 10.1002/2017JA024526
Scopus记录号: 2-s2.0-85040200183
论文题名: Analyzing the Magnetopause Internal Structure: New Possibilities Offered by MMS Tested in a Case Study
作者: Rezeau L. ; Belmont G. ; Manuzzo R. ; Aunai N. ; Dargent J.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 1 起始页码: 227
结束页码: 241
语种: 英语
英文关键词: magnetopause
英文摘要: We explore the structure of the magnetopause using a crossing observed by the Magnetospheric Multiscale (MMS) spacecraft on 16 October 2015. Several methods (minimum variance analysis, BV method, and constant velocity analysis) are first applied to compute the normal to the magnetopause considered as a whole. The different results obtained are not identical, and we show that the whole boundary is not stationary and not planar, so that basic assumptions of these methods are not well satisfied. We then analyze more finely the internal structure for investigating the departures from planarity. Using the basic mathematical definition of what is a one-dimensional physical problem, we introduce a new single spacecraft method, called LNA (local normal analysis) for determining the varying normal, and we compare the results so obtained with those coming from the multispacecraft minimum directional derivative (MDD) tool developed by Shi et al. (2005). This last method gives the dimensionality of the magnetic variations from multipoint measurements and also allows estimating the direction of the local normal when the variations are locally 1-D. This study shows that the magnetopause does include approximate one-dimensional substructures but also two- and three-dimensional structures. It also shows that the dimensionality of the magnetic variations can differ from the variations of other fields so that, at some places, the magnetic field can have a 1-D structure although all the plasma variations do not verify the properties of a global one-dimensional problem. A generalization of the MDD tool is proposed. ©2017. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114869
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: LPP, CNRS, Ecole polytechnique, UPMC Univ Paris 06, Univ. Paris-Sud, Observatoire de Paris, Université Paris-Saclay, Sorbonne Universités, PSL Research University, Paris, France; IRAP, CNRS, Université de Toulouse, Toulouse, France
Recommended Citation:
Rezeau L.,Belmont G.,Manuzzo R.,et al. Analyzing the Magnetopause Internal Structure: New Possibilities Offered by MMS Tested in a Case Study[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(1)