Bond et al. (1997) Science 278: 1257 established quasi-periodic (c.1500 years) climate fluctuations during the Holocene. They related ice-rafted debris (IRD) with the slowdown of the Atlantic thermohaline circulation (THC) and, later, to variations in solar radiation, as the IRD fluctuations were coherent with the production rates of cosmogenic nuclides of ¹⁴C and ¹⁰Be (Bond et al. (2001) Science 294: 2130). Therefore, Bond cycles suggest that solar radiation must have had a marked influence on Holocene climate variation in all regions influenced by changes in Atlantic ocean circulation (R. W. Battarbee, F. Gasse, and C. E. Stickley (eds) 2004). See also Pèlachs et al. (2011) Holocene 21: 95.