Spatial-Temporal Distribution and Variation of NO2 and Its Sources and Chemical Sinks in Shanxi Province, China

In present China, continuing to control PM2.5 (particulate matter < 2.5 μm) and preventing the rise of O3 are most urgent environmental tasks in its air clean actions. Considering that NO2 is an important precursor O3, a comprehensive analysis around this pollutant was conducted based on real-time-monitoring data from Jan 2018 Mar 2019 11 prefecture-level cities Shanxi Province China. The results showed annual average concentration mainly distributed range 28.84–48.93 μg/m3 with values five exceeding Chinese Grade Ⅱ standard limit (40 μg/m3). over-standard days were all concentrated heating season large pollution peak occurring winter except Lvliang, while four also had small summer. High polluted areas central part Shanxi, trended whole southwest northeast (Lvliang/Linfen—Taiyuan/Jinzhong—Yangquan/Jinzhong), which different spatial distribution O3. Lvliang hot spot summer, Taiyuan winter. Concentration Weighted Trajectory (CWT) indicated central-north Shaanxi, central-south northern Henan, south Shijiazhuang Erdos Inner Mongolia source besides local emissions. Our findings expected provide valuable implications policymakers China effectively abate pollution.