A REVIEW IN STABLE ISOTOPE STUDIES FOR BURIED WOOD DURING THE CENOZOIC
Stable isotope studies on tree rings significantly enhance our understanding of past climates.The Cenozoic era,characterized by varying warming conditions and numerous climate extremes,emerges as an important epoch for predicting future climate change.Buried fossil wood within Cenozoic strata,which preserves the cellulose and lignin from its growth ages,would offer valuable insights into paleoclimatic shifts ranging from seasonal to interdecadal scales.A review of buried wood isotope studies reveals a predominant concentration of research sites in Europe and the Americas.These studies mainly focus on three areas:(1)using buried wood stable isotopes for reconstructing paleoprecipitation and paleotemperature;(2)integrating multiple isotopes of buried wood to determine relative humidity and other climate parameters;and(3)utilizing seasonal isotopic variations in buried wood to reconstruct fluctuations in seasonal precipitation and trace the origin of source water.Future research holds great potential,especially in integrating multiple isotopes in buried wood,elucidating the paleoclimatic significance of seasonal isotope variations,and applying isotopes in lignin clusters.
fossil woodcellulosecarbon isotopes for tree ringsoxygen isotopes for tree ringspalaeoclimate
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