Method and system for inverting ground PM 2.5 through combination of geostatistical interpolation and satellite remote sensing

Abstract

The invention provides a method and system for inverting the ground PM 2.5 through combination of geostatistical interpolation and satellite remote sensing. The method comprises: based on a space-time kriging interpolation model and a constructed space-time variogram model, obtaining a first concentration value of the ground PM 2.5 of a to-be-inverted region; based on a constructed satellite AOD inversion model, obtaining a second concentration value of the ground PM 2.5 of the to-be-inverted region; and fusing the first and second concentration values to estimate a final concentration value of the ground PM 2.5 of the to-be-inverted region. A weight relationship is established according to the root-mean-square error of the first and second concentration values, and the first and second concentration values are fused according to the weight relationship to estimate the final concentration value of the ground PM 2.5 of the to-be-inverted region. According to the method and system, the estimation accuracy of PM 2.5 is improved in a situation that ground monitoring stations are less, and the defect that PM 2.5 cannot be estimated at the place where AOD data is lost is overcome.

Description

technical field [0001] The invention relates to the technical field of aerosol monitoring, and more specifically, relates to a method and system for jointly inverting ground PM2.5 by geostatistical interpolation and satellite remote sensing. Background technique [0002] With the rapid development of the economy, industrial activities and man-made emissions of harmful gases such as vehicle exhaust have increased sharply, resulting in continuous deterioration of air quality. PM2.5 refers to particulate matter in the air with an aerodynamic particle size of less than 2.5 microns. Compared with large-size particles, PM2.5 has a small particle size, is rich in a large amount of toxic and harmful substances, has a long residence time in the atmosphere, and has a long transportation distance, so it has a great impact on the quality of the human body and the atmospheric environment. A large number of epidemiological studies have proved that there is a certain relationship between ...

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Problems solved by technology

[0007] In view of the above problems, the object of the present invention is to provide a method and system for jointly inverting ground PM2.5 by geostatistical interpolation and satellite remote sensing, so as to solve the problem that the estimation accuracy of regional PM2.5 is not high by existing estimation methods

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