Use of 10Be in polar ice to trace the 11-year cycle of solar activity

Beer, J.; Blinov, A.; Bonani, G.; Finkel, R. C.; Hofmann, H. J.; Lehmann, B.; Oeschger, H.; Sigg, A.; Schwander, J.; Staffelbach, T.; Stauffer, B.; Suter, M.; Wölfli, W. (1990). Use of 10Be in polar ice to trace the 11-year cycle of solar activity. Nature, 347(6289), pp. 164-166. Nature Publishing Group 10.1038/347164a0

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A detailed knowledge of the history of solar magnetic activity is important in several respects. From satellite data there is increasing evidence that solar magnetic activity and solar irradiance are positively correlated, a conclusion with important implications for climatology (1). Because of the complexity of variations in solar activity, a long record is necessary for understanding the mechanisms responsible for heliomagnetic cyclicity (2). Here we show that 10Be concentrations in polar ice can be used to study variations in the solar activity—particularly the 11-year cycle—in time periods pre-dating historical records.

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