Many lacustrine chronology records suffer from radiocarbon reservoir effects. A continuous, accurate varve chronology, in conjunction with accelerator mass spectrometry (AMS) ~(14)C dating, was used to determine the age of lacustrine sediment and to quantify the past ~(14)C reservoir effect in Sugan Lake (China). Reservoir age varied from 4340 to 2590 yr due to ~(14)C-depleted water in the late Holocene. However, during the Little Ice Age (LIA), ~(14)C reservoir age was relatively stable. According to this study, ~(14)C reservoir age in the late Holocene may be driven by hydrological and climatic changes of this period. Therefore, special caution should be paid to the correction of the ~(14)C reservoir effect by a unique ~(14)C reservoir age in paleoclimatic and paleolimnological study of northwest China.
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