Method for measuring backscattering coefficient of atmospheric particulates and ozone concentration profile simultaneously

Abstract

The invention relates to a method for measuring backscattering coefficient of atmospheric particulates and ozone concentration profile simultaneously. A dual-wavelength differential absorption laser radar receives On and Off dual-wavelength backscattering echo signals of different cross sections of ozone simultaneously, and the acquired On and Off dual-wavelength backscattering echo signals are subjected to pretreatments such as background deduction, square distance correction, filtering and the like; the initial ozone concentration value is assumed, the atmospheric molecule mode is a united states standard atmosphere mode, the corrected off wavelength echo signal is utilized to invert the Off wavelength backscattering coefficient, and the On wavelength backscattering coefficient is obtained according to the wavelength conversion relation, and the ozone concentration is inverted in combination with the On wavelength backscattering echo signal; if the difference between the inverted ozone concentration and the initial ozone concentration value is more than a preset value, the above process is carried out in a loop iteration manner until the difference reaches the preset value, and therefore, the backscattering coefficient of atmospheric particulates and ozone concentration can be obtained simultaneously. The method can effectively reduce aerosol interference and improve the zone measurement precision.

Description

technical field [0001] The invention relates to the fields of environmental science and laser radar, in particular to a method for simultaneously measuring the backscattering coefficient of atmospheric particles and the ozone concentration profile. Background technique [0002] The urban environment is an important factor affecting the health and quality of life of urban people. At present, the problem of combined atmospheric pollution characterized by high concentrations of fine particulate matter and ozone has become a major problem in the urban environment. Exploring the method of measuring the backscattering coefficient of atmospheric particulate matter and the ozone concentration profile is crucial to understanding the relationship between ozone and particulate matter mechanism is important. [0003] Differential absorption lidar has the advantages of high measurement accuracy, high temporal and spatial resolution, and continuous day and night measurement, so it has be...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a method for simultaneously measuring the backscattering coefficient of atmospheric particles and the ozone concentration profile, to solve the problem of large errors, complicated operation, and more resources needed in the traditional method effectively solve the problem of aerosol interference, and provide particle backscattering coefficients at ultraviolet wavelengths, providing technical support for the study of optical characteristics and fine particle mass concentration of ultraviolet wavelength particles

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