Atmospheric pollution simulation and prediction algorithm with added methane chemistry and natural source discharging

Abstract

The invention discloses a mid-scale atmospheric photochemistry pollution simulation and prediction algorithm with added methane chemistry changes. Based on a CALGRID chemistry mode, influences of atmospheric chemistry reaction, atmosphere conveying and diffusing, settling, a ground surface source and an elevation discharging source are considered, and an OH free radical and CH4 are used as variables on the basis; natural source discharging of methane is considered, a chemical reaction of the OH free radical and the methane (CH4) is introduced, and the concentration changes of the OH free radical and the CH4 are calculated according to a chemical reaction list of the OH free radical and CH4. In the algorithm, an air quality mode is utilized for simulating the space-time distribution of theOH free radical and the CH4, in this way, the atmosphere oxidation capacity of a simulated region is easily learned about, and details of the photochemical reaction are easily and deeply learned about.

Description

technical field [0001] The invention belongs to the technical field of atmospheric environmental pollutant detection, and in particular relates to an improved prediction model of mesoscale atmospheric photochemical pollution. Background technique [0002] The air quality model is based on the understanding of a series of physical and chemical processes such as transmission, diffusion, transformation and removal of pollutants discharged into the atmosphere, using research methods and computer technologies in meteorology, environment, physics, chemistry and other disciplines. The method of simulating and forecasting the distribution and trend of air pollutant concentration on different spatial scales has important practical application value in air quality forecasting, air pollution control, environmental planning and management, urban construction and public health, and has Broad development prospects. [0003] CALGRID was developed by the ARB (Air Resources Board) in Califo...

AI Technical Summary

Problems solved by technology

[0005] as atmospheric O 3 Precursors of CH, although CH 4 The reactivity is lower than that of O 3 The other two important precursors of NMHC and NO x (Zhu Bin et al., 2000), but due to their longer lifetime in the atmosphere, they affect a wider range, play an important role in clean areas and regional and global scale photochemical reactions, and affect the oxidation capacity of the troposphere (Wang Xingxing et al., 1999; Qin Yu et al., 2003)

Images