Century-Scale Shifts in Early Holocene Atmospheric CO2 Concentration
作者： Friederike Wagner , Sjoerd JP Bohncke , David L Dilcher , Wolfram M Kurschner , Bas van Geel
DOI: 10.1126/SCIENCE.284.5422.1971
关键词:
摘要: The inverse relation between atmospheric carbon dioxide concentration and stomatal frequency in tree leaves provides an accurate method for detecting quantifying century-scale fluctuations. Stomatal signatures of fossil birch reflect abrupt increase at the beginning Holocene. A succeeding decline matches Preboreal Oscillation, a 150-year cooling pulse that occurred about 300 years after onset In contrast to conventional ice core estimates 270 280 parts per million by volume (ppmv), signal suggests early Holocene concentrations were well above ppmv.
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