Remarks on astrochronology and time series analysis of Lake Sake varved sediments
A 4190-yr varve record from lake Saki (Crimea) was recently re -analyzed using five different spectral methods, applied both overall and to separate segments of the record (Xanthakis et al., 1995a). Here we consider its palaeoclimatic implications, spanning much of the Holocene Subboreal and Subatlantic biozones, and compare the spectra with those of planetarysola r orbital and radiation periodicities. Linkage is found with both the data on harmonics of the Earth-Moon Milankovitch parameters, and with harmonics and resonances of (a) the major planets, (b) the proxy solar activity record disclosed by 14C flux in the Stuiver and Braziunas dendroscronological record, and (c) the long-term observations of geomagnetics and auroras. The most significant (>95%) of the Xanthakis et al data are in the ranges 20-25, 44-46, 57-67, 120-130 and 200-250 yr (Liritzis and Fairbridge, 1998). All of these clusters are strongly represented in the spectra of both palaeoclimatic and astronomic frequency series.