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Attribution analysis method for near-surface fine particles

A fine particle and analysis method technology, applied in the field of satellite remote sensing, to achieve the effect of enhanced specific gravity, simple calculation and high efficiency

Active Publication Date: 2020-03-24
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

It is speculated that if 15 years of data are simulated, it will take 4 years

Method used

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  • Attribution analysis method for near-surface fine particles
  • Attribution analysis method for near-surface fine particles

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Embodiment

[0046] The attribution analysis method of the near-ground fine particulate matter among the present invention, research goal is to PM 2.5 The attribution analysis of man-made and gas-phase factors for the change of mass concentration is based on a remote sensing estimation method with a physical basis. The remote sensing estimation method is PM 2.5 Remote sensing (PMRS) model, the specific formula of the model is as follows:

[0047]

[0048] Among them: AOD is the aerosol optical thickness; FMF is the proportion of fine-mode aerosol to the total optical thickness; VEf is the volume extinction ratio parameter with FMF as the independent variable, which is obtained by empirical fitting; PBLH is the planetary boundary layer Height; RH is the relative humidity of the environment; ρ f,dry is the effective density of fine particles; f 0 Characterize the moisture absorption growth factor of fine particles with RH as the independent variable;

[0049] Based on the definite PMRS...

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Abstract

The invention discloses an attribution analysis method for near-surface fine particles. According to the method, attribution analysis can be carried out on the contribution of he PM2.5 mass concentration based on direct observation, compared with a chemical transmission model, the uncertainty of an emission source is abandoned, the proportion of observation in attribution is increased, and the method has the advantages of being simple in calculation, high in efficiency and more suitable for near-real-time satellite monitoring service. The dominant contribution ratio of man-made and weather contributions to PM2.5 evolution is obtained by utilizing the man-made and weather dominant contributions calculated by the change rate of the influence factor and the evolution quantity, and important support is provided for environmental monitoring and treatment.

Description

technical field [0001] The invention relates to the field of satellite remote sensing, in particular to an attribution analysis method for fine particles near the ground. Background technique [0002] Suspended particulate matter (PM) in the atmosphere can not only scatter and absorb solar radiation, which affects the energy balance of the earth and atmosphere, but also can reduce the visibility near the ground level, posing a serious threat to public transportation safety (highways, airports, etc.). The increase of atmospheric particulate matter may also affect cloud albedo and life force, indirectly causing climate change. At the same time, the environmental impact of atmospheric particulate matter cannot be ignored. Particles with a particle size of less than 10 μm will be inhaled by the human body and cause harm to the respiratory tract, while particles smaller than 2.5 μm (PM 2.5 ) can enter the alveoli and cause various diseases. Currently, China's rapid development...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06
CPCG01N15/06G01N15/075
Inventor 李正强张莹陈杰魏媛媛
Owner INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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