The Characteristics of Organic Carbon Isotope Records in Northeast China and Adjacent Areas During the Past 20,000 Years
The Last Glacial Maximum(LGM)occurred approximately 21,000 years ago,and the climatic evolution over the past 20,000 years constitutes a crucial aspect in the study of historical climate fluctuations as well as a pivotal factor in forecasting future climate variations.Based on the long chain normal paraffin monomer carbon isotope(δ13C)recorded in lakes,peat and soil organic matter carbon isotope(δ13CSOM),the temporal evolution sequence of carbon isotope since LGM in northeast China and neighboring areas was reconstructed.The results suggest that the δ13C value exhibited a peak(-23‰)during the transition from the Last Glacial Maximum(LGM)to the early Holocene,followed by a subsequent decline and stabilization after the Middle Holocene.Through comparison with paleoclimate records,it is evident that effective humidity plays a dominant role in influencing variations in 813C values in Northeast China and neighboring regions since LGM.
Last Glacial Maximumnortheast China and adjacent areascarbon isotopeeffective humidity
万方数据
维普
