The camp century 10Be record: Implications for long-term variations of the geomagnetic dipole moment

Beer, Jürg; Andree, Michael; Oeschger, Hans; Siegenthaler, Ulrich; Bonani, G.; Hofmann, H.; Morenzoni, E.; Nessi, E.; Suter, M.; Wölfli, W.; Finkel, R.; Langway Jr., C. (1984). The camp century 10Be record: Implications for long-term variations of the geomagnetic dipole moment. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 5(2), pp. 380-384. Elsevier 10.1016/0168-583X(84)90545-7

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10Be concentrations measured in ice samples from Camp Century, Greenland, show short term variations which in general correspond to the 100–200 year “wiggles” in the 14C tree ring record. There is, however, no evidence for a long term variation over the last 5000 years. This constancy is in contrast to the approximately sinusoidal variation of the atmospheric 14C concentration which has generally been attributed to a changing geomagnetic dipole moment. This discrepancy implies that the 14C trend might stem from other causes such as changes of oceanic circulation processes or from higher production rates during the Wisconsin rather than from variation in the geomagnetic field.

Item Type:	Journal Article (Original Article)
Division/Institute:	08 Faculty of Science > Physics Institute > Climate and Environmental Physics
Subjects:	500 Science > 530 Physics
ISSN:	0168-583X
Publisher:	Elsevier
Language:	English
Submitter:	BORIS Import 2
Date Deposited:	16 Sep 2021 15:16
Last Modified:	16 Sep 2021 15:16
Publisher DOI:	10.1016/0168-583X(84)90545-7
URI:	https://boris.unibe.ch/id/eprint/158474