Method of calculating PM2.5 background concentration in different orientations at different observation points of prediction area

Abstract

The invention discloses a method of calculating PM2.5 background concentration in different orientations at different observation points of a prediction area. The method is characterized in that a plurality of meteorological observation station points and adjacent PM2.5 observation points in different orientations of the prediction area are selected; meteorological observation data and PM 2.5 value observation data are processed, and extreme value data is eliminated; by adopting a clipping average value calculation method, a high monitoring extreme value and a low monitoring extreme value are eliminated; background concentration of a mathematical statistic method is acquired by using 20% clipping average value; based on a scenario analysis method, background concentration of numerical simulation is acquired; the spatial distribution of the PM2.5 background concentration in different orientations is acquired according to the background concentration of the mathematical statistic method and the background concentration of the numerical simulation. The invention discloses a method of calculating PM2.5 background concentration at different points of the prediction area. By adopting the mathematical statistic method, the physical identification method, and the numerical simulation method in an integrated way, the background value concentration is accurately simulated, the uncertainty of the background concentration analysis is greatly reduced, and multi-angle decision support information is provided for management departments.

Description

Technical field [0001] The present invention relates to atmospheric environment PM 2.5 The technical field of concentration distribution, more specifically relates to a prediction area of ​​different azimuths, observation points PM 2.5 Calculation method of background concentration. Background technique [0002] Previous studies on the establishment of the background value of pollutants in the ambient air in a certain area generally rely on the establishment of environmental background stations to obtain corresponding monitoring data. However, with the development of the national urbanization process, the pollutants discharged by the continuous urban agglomeration are increasing. Long-distance transportation under certain weather conditions will inevitably lead to an increase in the concentration of pollutants in the background area. [0003] These research PM 2.5 Background value methods are mostly mathematical statistics and physical identification methods. How to reasonably elim...

AI Technical Summary

Problems solved by technology

[0002] In previous studies, the establishment of the background value of pollutants in ambient air in a certain area generally relied on the establishment of environmental background stations to obtain corresponding monitoring data. Long-distance transportation under certain meteorological conditions will inevitably lead to an increase in the concentration of pollutants in the background area

Images