DOI: 10.1002/2015GL063603
论文题名: Magnetic field fluctuation features at Swarm's altitude: A fractal approach
作者: De Michelis P. ; Consolini G. ; Tozzi R.
刊名: Geophysical Research Letters
ISSN: 0094-9103
EISSN: 1944-8834
出版年: 2015
卷: 42, 期: 9 起始页码: 3100
结束页码: 3105
语种: 英语
英文关键词: fluctuations
; geomagnetic field
; polar ionosphere
Scopus关键词: Fractals
; Ionosphere
; Ionospheric measurement
; Magnetic fields
; Magnetosphere
; Essential characteristic
; European Space Agency
; Fluctuations
; Geomagnetic fields
; Local Hurst exponent
; Magnetic field fluctuations
; Polar ionospheres
; Statistical parameters
; Geomagnetism
; altitude
; geomagnetic field
; ionosphere
; magnetic field
; spatiotemporal analysis
; statistical analysis
; turbulence
英文摘要: The European Space Agency's Swarm mission provides a qualitatively new level of observational geomagnetic data, which allows us to study the spatial features of magnetic field fluctuations, capturing their essential characteristics and at the same time establishing a correlation with the dynamics of the systems responsible for the fluctuations. Our study aims to characterize changes in the scaling properties of the geomagnetic field's spatial fluctuations by evaluating the local Hurst exponent and to construct maps of this index at the Swarm's altitude (∼460km). Since a signal with a larger Hurst exponent is more regular and less erratic than a signal with a smaller one, the maps permit us to localize spatial structures characterized by different scaling properties. This study is an example of the potential of Swarm data to give new insights into ionosphere-magnetosphere coupling; at the same time, it develops new applications where changes in statistical parameters can be used as a local indicator of overall magnetospheric-ionospheric coupling conditions. Key Points Scaling features of magnetic spatiotemporal fluctuations at Swarm's altitude Change of the geomagnetic fluctuation scaling properties with activity level Ionospheric high-latitude turbulence ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930480154&doi=10.1002%2f2015GL063603&partnerID=40&md5=5bbf4c213ce2ec9d57aa9858745ff9c4
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8719
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy
Recommended Citation:
De Michelis P.,Consolini G.,Tozzi R.. Magnetic field fluctuation features at Swarm's altitude: A fractal approach[J]. Geophysical Research Letters,2015-01-01,42(9).