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

An optical thickness and aerosol technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of difficulty in determining the contribution rate of humidity and vertical elevation, etc.

Active Publication Date: 2018-11-06
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

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Embodiment 1

[0062] This embodiment provides an aerosol optical thickness and PM2.5 inversion correction method, which can provide a basis for the accuracy and precision of PM2.5 inversion in the study area, and can also indirectly determine the influence of other climatic conditions on the inversion results The size of the degree.

[0063] figure 1 It is a schematic flowchart of an aerosol optical thickness and PM2.5 inversion correction method according to an embodiment of the present invention.

[0064] In step S1, the model building step: use the CALIPSO lidar secondary aerosol data product within a preset time period, introduce aerosol humidity correction method and aerosol vertical elevation correction method, and take the aerosol optical thickness below the preset height near the ground as The independent variables and near-ground PM2.5 mass concentration data are the dependent variables, and five regression fitting models are established: linear, quadratic, power, logarithmic and expone...

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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...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 李卫东董立晔王珂段金龙董前林张学海赵晨曦孟凡谦张定文庞留记
Owner HENAN UNIVERSITY OF TECHNOLOGY
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