We present continuous 10Be data extending to 3.5 Ma that show strong response to the Earth's magnetic field shielding. We find a prominent enhancement in 10Be at geomagnetic reversals and in particular at the Brunhes/ Matuyama geomagnetic boundary and several geomagnetic excursions during the Brunhes Chron. Similarity in 10Be 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.
|Number of pages||4|
|Journal||Geophysical Research Letters|
|Publication status||Published - Mar 15 2003|
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)