Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/9558
AuthorsDe Michelis, P.* 
Consolini, G.* 
Tozzi, R.* 
TitleMagnetic field fluctuation features at Swarm's altitude: a fractal approach
Issue Date2015
Series/Report no.9/42 (2015)
DOI10.1002/2015GL063603
URIhttp://hdl.handle.net/2122/9558
Keywordsrapid time variations
ionosphere-magnetosphere interaction
turbulence
Subject Classification05. General::05.07. Space and Planetary sciences::05.07.01. Solar-terrestrial interaction 
AbstractThe ESA Swarm mission provides a qualitatively new level of observational geomagnetic data, \textbf{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 \textbf{at the Swarm's altitude ($\sim460$ km)}. 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.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
DeMichelisGRL.pdfMain article - final draft307.6 kBAdobe PDFView/Open
Show full item record

Page view(s)

165
Last Week
1
Last month
checked on Jun 23, 2017

Download(s)

130
checked on Jun 23, 2017

Google ScholarTM

Check

Altmetric