Speakers
Description
The correction of " Reservoir Effect" in lake sediments is a particularly challenging issue in radiocarbon chronology. The controlling factors of Reservoir Effect and how to correct for it remain unclear. A research team systematically reviewed the past 20 years of lake studies in different climatic regions of China, and systematically investigated the 14C ages and correction methods used in 81 lake studies. The study found that climate-vegetation cover and the distribution of carbonates around the lake are the main factors controlling the radiocarbon reservoir effect. In eastern China, the average 14C reservoir age is about 500 years, which is related to relatively dense vegetation. However, in northwestern China and the Tibetan Plateau, the widespread carbonate bedrock may significantly increase the radiocarbon reservoir age, typically around 1500 and 2500 years, respectively. The segmented linear regression model provides a more reliable method for 14C reservoir age correction, which takes into account the changes in sedimentary facies and sedimentation rates. It is worth mentioning that when the 14C age significantly deviates from the time series, the age anomaly may indicate significant impacts related to climate and environmental change research.
| Student Submission | No |
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