TY - JOUR A1 - Yang, Y. A1 - Zhou, M. A1 - Wang, T. A1 - Yao, B. A1 - Han, P. A1 - Ji, D. A1 - Zhou, W. A1 - Sun, Y. A1 - Wang, G. A1 - Wang, P. T1 - Spatial and temporal variations of CO2 mole fractions observed at Beijing, Xianghe, and Xinglong in North China JO - Atmos. Chem. Phys. J1 - ACP VL - 21 IS - 15 SP - 11741 EP - 11757 Y1 - 2021/08/06 PB - Copernicus Publications SN - 1680-7324 UR - https://acp.copernicus.org/articles/21/11741/2021/ L1 - https://acp.copernicus.org/articles/21/11741/2021/acp-21-11741-2021.pdf DO - 10.5194/acp-21-11741-2021 ER -