The ZK isotopic records during the past nine millennia (IMAGE)
Caption
(a) The ZK δ18O record, thin line indicates the raw data, thick line indicates 30-year means, and black line indicates the long-term trend. The numbers 1 to 4 indicate the four cooling events during the 7-9 thousands years ago. (b) The δ18O record after applying a 200-600 year band-pass filter to show the centennial-scale variability. (c) and (d) same as (a) and (b) but for the d-excess record. Error bars at the bottom indicate the calibrated 14C ages and the uncertainty (1σ).
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