Niu Zhenchuan, Zhou Weijian, Zhang Xiaoshan, Wang Sen, Zhang Dongxia, Lu Xuefeng, Cheng Peng, Wu Shugang, Xiong Xiaohu, Du Hua, Fu Yunchong
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China.
Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China.
Environ Sci Pollut Res Int. 2016 Jan;23(1):556-62. doi: 10.1007/s11356-015-5211-2. Epub 2015 Sep 2.
Atmospheric fossil fuel CO2 (CO2ff ) information is an important reference for local government to formulate energy-saving and emission reduction in China. The CO2ff spatial distribution in Beijing City was traced by Δ(14)C in the leaves of gingko (Ginkgo biloba L.) from late March to September in 2009. The Δ(14)C values were in the range of -35.2 ± 2.8∼15.5 ± 3.2 ‰ (average 3.4 ± 11.8 ‰), with high values found at suburban sites (average 12.8 ± 3.1 ‰) and low values at road sites (average -8.4 ± 18.1 ‰). The CO2ff concentrations varied from 11.6 ± 3.7 to 32.5 ± 9.0 ppm, with an average of 16.4 ± 4.9 ppm. The CO2ff distribution in Beijing City showed spatial heterogeneity. CO2ff hotspots were found at road sites resulted from the emission from vehicles, while low CO2ff concentrations were found at suburban sites because of the less usage of fossil fuels. Additionally, CO2ff concentrations in the northwest area were generally higher than those in the southeast area due to the disadvantageous topography.
大气中化石燃料二氧化碳（CO2ff）信息是中国地方政府制定节能减排政策的重要参考依据。通过测定2009年3月下旬至9月间银杏（Ginkgo biloba L.）叶片中的Δ(14)C，追踪了北京市CO2ff的空间分布情况。Δ(14)C值范围为-35.2±2.8‰至15.5±3.2‰（平均为3.4±11.8‰），郊区站点的值较高（平均为12.8±3.1‰），道路站点的值较低（平均为-8.4±18.1‰）。CO2ff浓度在11.6±3.7至32.5±9.0 ppm之间变化，平均为16.4±4.9 ppm。北京市的CO2ff分布呈现出空间异质性。道路站点因车辆排放形成CO2ff热点，而郊区站点由于化石燃料使用较少，CO2ff浓度较低。此外，由于地形不利，西北地区的CO2ff浓度总体高于东南地区。
