Geomagnetic and climatic variability reflected by 10Be during the Quaternary and late Pliocene -: art. no. 1301

被引:14
作者
Aldahan, A [1 ]
Possnert, G
机构
[1] Uppsala Univ, Dept Earth Sci, Inst Earth Sci, S-75236 Uppsala, Sweden
[2] Uppsala Univ, Tandem Lab, S-75121 Uppsala, Sweden
关键词
FIELD INTENSITY; ICE CORE; MODULATION; BERYLLIUM; GREENLAND; REVERSALS; FLUX; SUN; KYR;
D O I
10.1029/2002GL016077
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
[1] We present continuous Be-10 data extending to 3.5 Ma that show strong response to the Earth's magnetic field shielding. We find a prominent enhancement in Be-10 at geomagnetic reversals and in particular at the Brunhes/Matuyama geomagnetic boundary and several geomagnetic excursions during the Brunhes Chron. Similarity in Be-10 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.
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页数:4
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