Method for rapidly calculating emission source intensity based on gas concentration monitoring data

The invention discloses a method for quickly calculating emission source intensity based on gas concentration monitoring data. The method comprises the following steps: acquiring position distribution data of a target area wind field observation station; acquiring wind field data of the target area, performing quality control processing, determining a wind field model, and performing wind field assimilation; acquiring atmospheric pollutant concentration data for basic processing, and performing concentration field assimilation in combination with wind field assimilation data; solving grid point data of pollutant concentration space distribution in the target area based on the position distribution data, the wind field assimilation data and the concentration field assimilation data of the wind field observation stations; modal analysis of pollutant diffusion is carried out, and the total emission source intensity of atmospheric pollutants in the target area is calculated. Spatial four-dimensional assimilation