摘要：Suborbital climate variability during the last glacial period has been sug-gested to be paced with a 1500-year period, but the expression and spatial distribution of this oscillation during interglacials remain unclear. Millennial-scale variations during the Holocene were first reported by Bond et al. (1997) based on ice-rafted hematite-stained grains (HSG) in North Atlantic sedi-ments. Although spectral analyses did not yield a significant 1500-year period, the abundance of these grains peaked on average every 1.5 millennia (Bond et al. 2001). However, few other climate records have shown a clear 1500-year periodicity in the Holocene
