Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/5115
AuthorsDe Michelis, P.* 
Tozzi, R.* 
Meloni, A.* 
TitleOn the terms of geomagnetic daily variation in Antarctica
Issue Date22-Jun-2009
Series/Report no.6 / 27 (2009)
URIhttp://hdl.handle.net/2122/5115
KeywordsGeomagnetism and paleomagnetism (Time variations, diurnal to secular)
Magnetospheric physics (Polar cap phenomena; Solar wind-magnetosphere interactions)
Subject Classification04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals 
05. General::05.07. Space and Planetary sciences::05.07.01. Solar-terrestrial interaction 
AbstractThe target of this work is to investigate the nature of magnetic perturbations produced by ionospheric and magnetospheric currents as recorded at high-latitude geomagnetic stations. In particular, we investigate the effects of these currents on geomagnetic data recorded in Antarctica. To this purpose we apply a mathematical method, known as Natural Orthogonal Composition, to analyze the magnetic field disturbances along the three geomagnetic field components (X, Y and Z) recorded at Mario Zucchelli Station (IAGA code TNB; geographic coordinates: 74.7° S, 164.1° E) from 1995 to 1998. Using this type of analysis, we characterize the dominant modes of the geomagnetic field daily variability through a set of empirical orthogonal functions (EOFs). While such mathematically independent EOFs do not necessarily represent physically independent modes of variability, we find that some of them are actually related to well known current patterns located at high latitudes.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Annales2009.pdfmain article3.24 MBAdobe PDFView/Open
Show full item record

Page view(s)

75
checked on Apr 29, 2017

Download(s)

64
checked on Apr 29, 2017

Google ScholarTM

Check