A method for ozone source apportionment based on observational data and chemical mechanism

Abstract

The invention discloses an ozone source analysis method based on observation data and chemical mechanisms, which belongs to the field of environmental air detection technology; specifically, it is an ozone source analysis method based on ozone precursor observation data and atmospheric chemical reaction mechanisms. This method first measures the concentration of VOCs in the ambient air, and obtains the NOx, O 3 concentration and meteorological data; then use the atmospheric chemical reaction box model to calculate O 3 Generation rate, screen adaptive atmospheric chemical reaction mechanisms and conduct ozone generation sensitive factor analysis; perform source analysis of sensitive precursors for ozone generation based on sensitivity analysis, and finally couple the atmospheric chemical reaction box based on the source analysis results of sensitive precursors Formula model analysis O 3 Source; established new methods and opened up new ideas for source analysis and chemical behavior research of ozone in the environment. This method has important scientific significance and important practical promotion and application value.

Description

technical field [0001] The invention belongs to the technical field of ambient air detection, and in particular relates to an ozone source analysis method based on observation data and chemical mechanism; specifically, an ozone source analysis method based on ozone precursor observation data and atmospheric chemical reaction mechanism. Background technique [0002] O in ambient air 3 The secondary pollutants, which are mainly produced by precursors such as NOx and VOCs under the action of light, have become important pollutants affecting the ambient air quality in summer and autumn in my country. In the actual photochemical reaction process, NOx and VOCs on O 3 The resulting effect is a highly nonlinear process, resulting in O 3 It is extremely difficult to identify the source of pollution, so it is necessary to study the source of ozone. [0003] earlier O 3 The source research method is to use the O 3 The empirical kinetic simulation method of the correlation between ...

AI Technical Summary

Problems solved by technology

However, the emission inventory used in the air quality model is obtained through the statistics of product output and energy consumption combined with emission factors. 3 There is uncertainty and hysteresis in the emission of precursors, and the inaccuracy of the emission source inventory will cause certain errors in the analysis results of ozone sources

In addition, the simulation process has very high requirements on computer capacity and speed, the amount of data calculation is very large, and the output is very complicated

[0005] Furthermore, both the earlier observation-based models and the O 3 The difference in the generation chemical mechanism will directly lead to the O 3 Generate differences in simulation results, which in turn lead to O 3 There is a certain error between the generated simulation results and the actual results

Images