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Method for simultaneously inversing fine particle aerosol optical thickness and aerosol types

An aerosol and fine particle technology, applied in the field of remote sensing, can solve the problems of lack of aerosols, inability to meet the needs of atmospheric environment monitoring, air pollution, etc., and achieve the effect of improving accuracy and spatial resolution

Active Publication Date: 2016-12-14
AEROSPACE INFORMATION RES INST CAS
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Problems solved by technology

The air pollution in North China is serious, and the types of aerosols are complex and diverse. The aerosol physical and optical parameters used in the inversion algorithm are mainly based on the results of European clean atmospheric environment observations, which cannot represent the characteristics of aerosols in North China.
2) The current PARASOL satellite polarization payload lacks aerosol type products
3) The spatial resolution of PARASOL fine particle AOD products obtained by inversion of PARASOL official algorithm is 18.5×18.5km 2 , and the spatial resolution is low, which cannot meet the needs of atmospheric environment monitoring between cities

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  • Method for simultaneously inversing fine particle aerosol optical thickness and aerosol types
  • Method for simultaneously inversing fine particle aerosol optical thickness and aerosol types

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Embodiment Construction

[0016] Such as figure 1 As shown, a kind of fine-particle AOD and aerosol type simultaneous inversion method based on multi-angle polarization technology of the present invention, including establishing aerosol parameter look-up table based on East Asian aerosol type and vector radiation transfer model, combined with PARASOL observation information and BPDF The model inversion simultaneously obtained PARASOL fine particle AOD and aerosol types. The inversion process is as follows:

[0017] 1) First, select the types of fine particle aerosols in East Asia, and use MIE scattering theory to calculate the polarization and scattering characteristics of fine particle aerosols. The six types of fine particle aerosols in East Asia are shown in Table 1:

[0018] Table 1 Six types of fine particle aerosols in East Asia (Lee et al., 2010)

[0019]

[0020] Among them, r m is the median radius of aerosol particles, S is the standard deviation, and C is the particle concentration; m ...

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Abstract

The invention discloses a method for simultaneously inversing fine particle aerosol optical thickness and aerosol types. The method includes the steps of establishing an aerosol parameter look-up table according to East Asia aerosol types and RT3 vector radiation transmission model, determining an earth polarization reflectivity according to a Maignan BPDF model, inversing to simultaneously obtain PARASOL loading fine particle AOD and aerosol types by combining a PARASOL loading observation radiation brightness, the aerosol parameter look-up table and the BPDF model, verifying the inversion precision of the PARASOL loading fine particle AOD and aerosol types by using AERONET Beijing station and Xianghe Station ground observation data, and drawing a PARASOL loading fine particle AOD thematic map by using ArcMap software. Air quality of North China areas can be accurately inversed, and precision and spatial resolution of PARASOL loading fine particle AOD can be improved. Aerosol types of a researched area can be known, thereby providing technical support for atmosphere quality monitoring of the North China areas.

Description

technical field [0001] The invention relates to the field of remote sensing, in particular to a simultaneous inversion method for fine particle aerosol optical thickness and aerosol type. Background technique [0002] Atmospheric aerosols generally refer to suspended in the atmosphere with a diameter of 10 -3 Particles of ~100um are an important component of the atmosphere. Aerosols have a direct impact on climate by scattering and absorbing short-wave radiation from the sun and long-wave radiation from the earth; aerosols interact with clouds to have an indirect impact on climate. In addition, near-surface aerosols affect the environment and human health, and can also cause traffic accidents. Therefore, to address these issues, it is necessary to study the characteristics of aerosol distribution and its source. [0003] Since aerosol scattered radiation has strong polarization characteristics, while most land surface reflected radiation has weak polarization characterist...

Claims

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Application Information

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IPC IPC(8): G01B11/06
CPCG01B11/06
Inventor 顾行发郭红程天海余涛陈好包方闻徐斌仁
Owner AEROSPACE INFORMATION RES INST CAS
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