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Geomagnetic and climatic variability reflected by 10 Be during the Quaternary and late Pliocene
Author(s) -
Aldahan A.,
Possnert G.
Publication year - 2003
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2002gl016077
Subject(s) - earth's magnetic field , geology , quaternary , geophysics , geomagnetic secular variation , geomagnetic reversal , paleomagnetism , isotopes of oxygen , paleontology , magnetic field , geomagnetic storm , physics , geochemistry , quantum mechanics
We present continuous 10 Be data extending to 3.5 Ma that show strong response to the Earth's magnetic field shielding. We find a prominent enhancement in 10 Be at geomagnetic reversals and in particular at the Brunhes/Matuyama geomagnetic boundary and several geomagnetic excursions during the Brunhes Chron. Similarity in 10 Be fluxes of Holocene to Eemian period occurs during oxygen isotope stages 11 through 13. According to our data, climatic patterns of these periods may likely represent exception rather than the rule during the last million years. We suggest that the interplay between the geomagnetic field shielding and solar activity had effectively regulated paleoclimatic attenuation.