Using 14C of tree rings to study CO2 emissions from fossil sources in Beijing
Zhao Qingzhang1, Ming He1, Wenhui Zhang1, Yijun Pang1, Hongyu He1, Jingjing Jia2, Aiguo Li2, Pan Hu1
1China Institute of Atomic Energy, 2Institute of Atmospheric Physics, Chinese Academy of Sciences
The study of fossil fuel-derived CO2 is important to understanding urban carbon emissions，which can help us to devise strategies to reduce emission. Using accelerator mass spectrometry to measure 14C of cedar tree rings near Beijing’s North Fourth Ring Road, the emission trends of large burned fossil sources during the process of Beijing’s urbanization were analyzed and studied. The results show that the concentration of 14C has a decreasing trend, and is positively correlated with the burning of a large number of fossil fuels in the economic and social development. Because burning large amounts of 14C-free fossil fuels emits CO2 and dilutes the concentration of CO2 in the atmosphere. This study lays a foundation for further research on the tracer application of 14C in the environment.
Keywords: fossil fuel-derived CO2; accelerator mass spectrometry;
Qingzhang Zhao received his ph. D. degree in particle and nuclear physics, associate Professor, Institute of Nuclear Physics, China Institute of Atomic Energy. His research interests include accelerator mass spectrometry and its applications, nuclear radiation detection system, computer system control, quantum mechanics, high energy physics, nuclear chemical sample preparation, etc.