¦¤¹⁴C level of annual plants and fossil fuel derived CO₂ distribution across different regions of China

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• 作者：X.T. Xi^a ; X.F. Ding^a ; D.P. Fu^a ; L.P. Zhou^b ; K.X. Liu^a ; ^{kxliu@pku.edu.cn}
• 关键词：¦¤14C ; Fossil fuel derived CO2 ; Annual plant ; AMS
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：2013
• 出版时间：January, 2013
• 年：2013
• 卷：294
• 期：Complete
• 页码：515-519
• 全文大小：748 K

文摘

The ¹⁴C level in annual plants is a sensitive tracer for monitoring fossil fuel derived CO₂ in the atmosphere. Corn leave samples were selected from different regions of China, including high mountains in the Tibetan Plateau, grassland in Inner Mongolia, and inland and coastal cities during the summer of 2010. The ¹⁴C/¹²C ratio of the samples was measured with the NEC compact AMS system at the Institute of Heavy Ion Physics, Peking University. The fossil fuel derived CO₂ was estimated by comparing the measured ¦¤¹⁴C values of corn leave samples to background atmospheric ¦¤¹⁴C level. The influences of topography, meteorological conditions and carbon cycling processes on the fossil fuel derived CO₂ concentration are considered when interpreting the data. Our results show a clear association of the low ¦¤¹⁴C values with regions where human activities are intensive.