Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007geoji.168..541b&link_type=abstract
Geophysical Journal International, Volume 168, Issue 337, pp. 541-550.
Astronomy and Astrophysics
Astronomy
10
Cals7K.2, Excursions, Field Reversals, Geomagnetism, Palaeomagnetism
Scientific paper
We have used the model CALS7K.2 to explore the possible influence of the time-varying non-dipole components of the geomagnetic field during field reversals and excursions. Our findings suggest that non-dipole components could add significant structure to the field during the reversal and excursion processes. Globally, the main polarity reversal is variable in duration and rapid reversals on subdecadal timescales are seen for a small number of locations. The model generates variable reversal paths; however, there is a longitudinal preference both spatially and, more weakly, temporally. Directional reversal features are not globally synchronous: some polarity changes finish before they start elsewhere. Global intensity variations, however, appear more coherent. We also find support for the idea that field intensity changes occur some time before and after the major directional changes of the reversal. Large excursions appear naturally when the axial dipole has been reduced to 20 per cent for the whole time period; however, they are not globally synchronous or uniform.
Bargery Alistair
Brown Maxwell C.
Holme Richard
No associations
LandOfFree
Exploring the influence of the non-dipole field on magnetic records for field reversals and excursions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Exploring the influence of the non-dipole field on magnetic records for field reversals and excursions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exploring the influence of the non-dipole field on magnetic records for field reversals and excursions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-738535