Abstract In this study, the spatiotemporal distribution of the NO2 and SO2 Vertical Columns Densities (VCDs) in the North China Plain (NCP) region was measured by long-distance mobile measurements using a mobile Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) instrument. The mobile observations were performed in both summer (July 2017) and winter (January and February 2018) and the total driving mileage exceeded 3000 km. The concentrations of NO2 and SO2 in different seasons and areas were significantly different. During winter, serious NO2 and SO2 pollution was observed in northern Anhui Province, central Shandong Province, and the Beijing-Tianjin-Hebei Region. The evolution and transportation processes of three typical heavy pollution cases were discussed in detail. Combined with the Weather Research and Forecasting with Chemistry model simulated wind field information, the NO2 transportation flux from northern Jiangsu Province to northern Anhui Province is quantified as 7.12 kg s−1. Finally, we estimated the NO2 and SO2 emissions from the Dezhou and Hengshui power plants by plume cross section scanning and encircled observations, respectively. The NO2 and SO2 emission fluxes of the Dezhou Power Plant are 0.79 kg s−1 and 1.11 kg s−1, respectively, while the NO2 and SO2 emission fluxes of the Hengshui Power Plant are 0.12 kg s−1 and 0.36 kg s−1, respectively. This study quantitatively analyzed the transportation of atmospheric pollutants and power plant emissions, which is helpful for understanding the occurrence and evolution of pollution and is also useful for the government to introduce policies to protect and control the atmospheric environment.

中文翻译：

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华北平原 NO2 和 SO2 远程移动 MAX-DOAS 观测及区域交通和电厂排放识别

摘要 本研究采用移动式多轴差分光吸收光谱仪 (MAX-DOAS) 对华北平原 (NCP) 地区 NO2 和 SO2 垂直柱密度 (VCDs) 的时空分布进行了长距离移动测量。 ） 乐器。移动观测分别在夏季（2017年7月）和冬季（2018年1月和2月）进行，总行驶里程超过3000公里。不同季节和地区NO2和SO2的浓度存在显着差异。冬季，皖北、鲁中、京津冀地区二氧化氮、二氧化硫污染严重。详细讨论了三个典型的重污染案例的演变和运输过程。结合 Weather Research and Forecasting with Chemistry 模型模拟的风场信息，从苏北到皖北的 NO2 输送通量量化为 7.12 kg s−1。最后，我们分别通过烟羽截面扫描和环绕观测估算了德州电厂和衡水电厂的 NO2 和 SO2 排放量。德州电厂NO2和SO2排放通量分别为0.79 kg s-1和1.11 kg s-1，而衡水电厂NO2和SO2排放通量分别为0.12 kg s-1和0.36 kg s-1 ， 分别。本研究定量分析了大气污染物的输送和电厂排放，