Please use this identifier to cite or link to this item:
Authors: De Santis, A.* 
Qamili, E.* 
Title: Equivalent monopole source of the geomagnetic South Atlantic Anomaly
Issue Date: May-2009
Keywords: South Atlantic Anomaly
equivalent monopole source
Earth core topography
Subject Classification04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals 
04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies 
Abstract: The South Atlantic magnetic Anomaly (SAA) is an important feature of the present geomagnetic field. In this paper we model the space-time evolution of this anomaly for the last 400 years in terms of the resultant between a decrease of a global axial dipole and an increase of a virtual local monopole source. Some characteristics of this evolution are investigated and some considerations are made on the light of a possible special state of the global geomagnetic field dynamical regime. Among the possible speculations, one is made regarding the topography of the core-mantle boundary (CMB) and its possible aspect underneath the SAA region in terms of simple sinusoidal undulations met by the monopole source during its centennial motion.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
SAA_Monopole_Pageoph_rev3_in press.pdf1.13 MBAdobe PDFView/Open
Show full item record

Page view(s)

Last Week
Last month
checked on Aug 13, 2018


checked on Aug 13, 2018

Google ScholarTM