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The Climatic Record of Organic Matter in the Paleosol from the Yuanbao Holocene Profile

HE Yong,\ QIN Da\|he,\ REN Jia\|wen,\ LI Feng\|xia (Key Laboratory of Ice Core and Cold Regions Environment, CAREERI, CAS, 730000, China)  
On the basis of the carbon isotope analysis of organic matter in the paleosol from the Yuanbao Holocene Profile, the values of δ\+\{13\}C are observed between \{-28.23\}~\{-25.19‰\}, with the average of \{-26.88‰\}. Combining the pollen record, it is found that the higher values of δ\+\{13\}C corresponds to warm and humid climate condition, and the lower values corresponds to cold and arid climate condition, which suggests that the climate change has resulted in the changes in δ\+\{13\}C and vegetation types. Three Holocene stages can be recognized from the variation in the characteristics of \{δ\+\{13\}C\} in the Yuanbao Holocene Profile. The Holocene climate features recorded in the profile were similar with those in other places of China. The carbon isotope of organic matter in the paleosol is also suggested as an indicator for climate change.
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