Aerosol optical thickness and PM2.5 inversion correction method and system

Abstract

The embodiment of the invention discloses an aerosol optical thickness and PM2.5 inversion correction method and system and relates to the field of environment protection. Through the method, a basiscan be provided for the accuracy and precision of PM2.5 inversion in a research region, and meanwhile the influence degrees of other climatic conditions on an inversion result can be judged indirectly. The method comprises a data analysis step, wherein relative humidity of a preset region in a preset time period and the rough change trend of aerosol scale height over seasons are analyzed; an inflection point judgment step, wherein according to the change trend, a cumulative anomaly method is utilized to judge inflection points of the relative humidity and the aerosol scale height; and a calculation determination step, wherein a cumulant slope change rate comparison method is utilized to determine respective contribution rates of the relative humidity and the aerosol scale height to aerosoloptical thickness and PM2.5.

Description

Technical field [0001] The invention relates to the field of ecological environment, in particular to a method and system for inversion and correction of aerosol optical thickness and PM2.5. Background technique [0002] With the rapid development of the global industrialized economy, air pollution has become increasingly serious, and hot environmental issues such as haze have attracted more and more attention. Pollutants such as haze not only affect people's normal work, life and travel, and the urban atmospheric environment, but also fine-particle aerosols (such as inhalable fine particulate matter PM2.5, etc.) can cause respiratory and cardiovascular diseases, which are extremely harmful Human health. [0003] However, fine particulate matter PM2.5 and aerosol optical thickness (AOD) are important indicators of urban atmospheric environmental quality, so their effective monitoring and analysis are particularly important. Researchers from all over the world have extensively stu...

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Problems solved by technology

[0005] In the past, many scholars selected a certain research area, introduced humidity correction and vertical correction methods, and used aerosol AOD data to establish and compare PM2.5-AOD simple linear regression models and multiple linear regression models. It is often difficult to determine the contribution rates of relative humidity and vertical elevation when performing humidity correction and elevation correction during the simulation.

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