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AuthorsDe Santis, A.* 
Falcone, C.* 
Torta, J. M.* 
TitleSimple additional constraints on regional models of the geomagnetic secular variation field
Issue DateOct-1996
Series/Report no.1-4 / 97 (1996)
Keywordsgeomagnetic regional models
secular variation
Subject Classification04. Solid Earth::04.05. Geomagnetism::04.05.03. Global and regional models 
05. General::05.01. Computational geophysics::05.01.03. Inverse methods 
AbstractStandard ways of building regional models of the geomagnetic field fail when one wishes to model secular variation (SV). The reason for this is that the SV is mainly a large-scale feature, while regional modelling is most appropriate for characterizing small-scale features. The new idea presented in this note consists in reducing this effect by requiring that the spatial derivatives of the SV produced by the regional model fit the values given by global (and smoother) models such as the international geomagnetic reference field.
DescriptionLecter section of Physics of the Earth and Planetary Interiors 97 (1996)
Appears in Collections:Papers Published / Papers in press

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