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A Method for Retrieving Aerosol Composition Using Lidar Ratio and Depolarization Ratio

A laser radar and aerosol technology, which is applied in the directions of using re-radiation, analyzing materials, and electromagnetic wave re-radiation, etc., can solve problems such as the difference in depolarization ratio, and achieve the effect of high accuracy and low detection cost.

Active Publication Date: 2022-02-08
INST OF ATMOSPHERIC PHYSICS CHINESE ACADEMY SCI
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Problems solved by technology

It should be noted that the actual observed lidar ratio (Burton et al., 2012; Murayama et al., 2004) is relatively close to the water-soluble aerosol, but the depolarization ratio of the two is significantly different

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  • A Method for Retrieving Aerosol Composition Using Lidar Ratio and Depolarization Ratio
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  • A Method for Retrieving Aerosol Composition Using Lidar Ratio and Depolarization Ratio

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[0067] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0068] Such as figure 1 As shown, a method for retrieving aerosol components using lidar ratio and depolarization ratio, including: S1, distinguishing dust, spherical aerosol, and a mixture of dust and spherical aerosol according to the depolarization ratio; S2, Calculating the mixing ratio of the dust in the mixture of the dust and the spherical aerosol; S3, distinguishing the soot and the water-soluble aerosol in the spherical aerosol according to the lidar ratio.

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Abstract

The invention discloses a method for retrieving aerosol components by using a laser radar ratio and a depolarization ratio, comprising: S1, distinguishing sand dust, spherical aerosol, and a mixture of sand dust and spherical aerosol according to the depolarization ratio; S2 , calculating the mixing ratio of the dust in the mixture of the dust and the spherical aerosol; S3, distinguishing the soot and the water-soluble aerosol in the spherical aerosol according to the lidar ratio. The invention only needs to pass the wavelength with a polarization channel to realize the identification of the aerosol components, and the detection cost is low and the accuracy is high.

Description

technical field [0001] The invention relates to the technical field of atmospheric environment monitoring, in particular to a method for retrieving aerosol components by using a laser radar ratio and a depolarization ratio. Background technique [0002] The lidar ratio (S) is the ratio of the extinction coefficient to the backscatter coefficient, and the calculation formula is: S i = σ i / β i (1) where i represents different aerosol components; σ i Represents the extinction coefficient of different components; β i Represents the backscattering coefficients of the different components. It is an important parameter by which aerosol components can be distinguished. For different types of aerosols, the lidar ratios vary greatly. Previous studies have shown that the lidar ratio for dust particles from Asia or the Sahara is about 50sr (Burton et al., 2012; Murayama et al., 2004). The variation in the LiDAR ratio for pure dust particles is mainly attributed to the differenc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/48G01N15/00
CPCG01S7/4802G01N15/00G01N33/0062G01S7/499G01S17/95Y02A90/10G01N15/1429G01N15/1434G01S17/88
Inventor 杨婷王自发王海波
Owner INST OF ATMOSPHERIC PHYSICS CHINESE ACADEMY SCI
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