Physics
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005e%26psl.236..339g&link_type=abstract
Earth and Planetary Science Letters, Volume 236, Issue 1-2, p. 339-347.
Physics
27
Scientific paper
We obtained new archeointensity data from French faience potsherds dated from the 17th to 19th century. These results further document the occurrence of sharp changes in geomagnetic field secular variation in Western Europe over the past three millennia. The intensity variation curve shows several maxima whose rising parts appear to coincide in time with the occurrence of cooling events documented in this region from natural and historical data. This coincidence suggests a causal link between enhanced secular variation of the geomagnetic field and climate change over centennial time scales, challenging the role of solar forcing as the sole factor provoking these climatic variations. We propose that the archeomagnetic jerks described by Gallet et al. [1] [Y. Gallet, A. Genevey, V. Courtillot, On the possible occurrence of archeomagnetic jerks in the geomagnetic field over the past three millennia, Earth Planet. Sci. Lett. 214 (2003) 237 242.] may engage the mechanism for centennial climate change.
Fluteau Frédéric
Gallet Yves
Genevey Agnès
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