Cheng JIANG, Gui-qian TANG, Qi-hua LI, Bao-xian LIU, Meng WANG, Yue-si WANG. Vertical Profile of Aerosol in Spring in Beijing Based on Multi-Axis Differential Optical Absorption Spectroscopy Detection[J]. Spectroscopy and Spectral Analysis, 2022, 42(1): 265