Spectra of four different records for the period 300−9400 years BP. a) 10Be from the GRIP ice core in Greenland (Vonmoos et al. 2006). b) 14C production rate derived from the 14C INTCAL09 record (Reimer et al. 2009). c) φ record based on 10Be records from GRIP (Greenland) and Drowning Maud Land (Antarctica) and the 14C production rate (Steinhilber et al. 2012). d) Calculated torque based on planetary positions.
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