Abstract
Based on the data sources of OMI data and haze data in North China, this paper studies the spatial distribution characteristics of SO<sub>2</sub> column amounts in North China from 2015 to 2017, and compares the relationship between SO<sub>2</sub> column amounts and haze. Corresponding analysis reveals the objective regularity of its existence. The results revealed that: 1) spatially, the value of SO<sub>2</sub> column is distributed higher in south and lower in north. In time, the amount of SO<sub>2</sub> column is characterized by winter > autumn > spring > summer; 2) during the haze event, SO<sub>2</sub> increased first and then decreased. The correlation analysis between the monthly average concentration of SO<sub>2</sub> and the frequency of haze weather, showed that there is a high correlation between the SO<sub>2</sub> concentration and the frequency of haze occurrence, and there is consistency in the space-time distribution; 3) The haze in North China is affected by meteorological and climatic factors and human activities. Coordination within the region is an important means to control air quality. To clarify the spatial and temporal distribution of SO<sub>2</sub> during the haze weather in North China is conductive to smooth progress of haze events control in North China.
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