Articles | Volume 9, issue 2
Research article
25 Apr 2018
Research article |  | 25 Apr 2018

Geomagnetic field declination: from decadal to centennial scales

Venera Dobrica, Crisan Demetrescu, and Mioara Mandea

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Cited articles

Abarco del Rio, R., Gambis, D., and Salstein, D. A.: Interannual signals in length of day and atmospheric angular momentum, Ann. Geophys., 18, 347–364,, 2000.
Alexandrescu, M., Courtillot, V., and Le Mouël, J. -L.: Geomagnetic field direction in Paris since the mid-sixteenth century, Phys. Earth Planet. Inter., 98, 321–360, 1996.
Alexandrescu, M., Courtillot, V., and Le Mouël, J. -L.: High resolution secular variation of geomagnetic field in Western Europe over the last 4 centuries: comparison and integration of historical data from Paris and London, J. Geophys. Res., 102, 20245–20258, 1997.
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Alldredge, L. R.: A discussion of impulses and jerks in the geomagnetic field, J. Geophys. Res., 86, 7957–7965, 1984.
Short summary
By analyzing frequency constituents of declination secular variation at inter-decadal and sub-centennial timescales from geomagnetic observatories with data longer than 1 century and several historical data sets, we suggest that the geomagnetic jerk concept should be considered as a more general notion, namely the evolution of the secular variation as a result of the superposition of two (or more) constituents describing the effects of processes in the Earth’s core at two (or more) timescales.