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Measuring method and device for inverting optical properties of aerosol based on tetrapolyoxygen absorption

A technology of optical characteristics and measurement methods, which is applied in the direction of color/spectral characteristic measurement, measuring devices, scientific instruments, etc., can solve the problems that parameters cannot be obtained, it is very time-consuming, and there are few atmospheric radiation transfer models, so as to achieve real-time and accurate acquisition and avoid effect of error

Pending Publication Date: 2020-01-14
HUAIBEI NORMAL UNIVERSITY
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Problems solved by technology

In recent years, the existing passive differential absorption spectroscopy technology has begun to use the atmospheric Ring effect observed by MAX-DOAS to invert the optical properties of aerosols and clouds. However, this method also has certain defects: on the one hand, the atmospheric radiative transfer There are few models and it is very time-consuming; on the other hand, the atmospheric Ring effect accounts for a small proportion in the optical depth, which is easily affected by other gases during the inversion process, and some parameters cannot be obtained (such as aerosol asymmetry factor, single diffuse albedo)

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  • Measuring method and device for inverting optical properties of aerosol based on tetrapolyoxygen absorption
  • Measuring method and device for inverting optical properties of aerosol based on tetrapolyoxygen absorption
  • Measuring method and device for inverting optical properties of aerosol based on tetrapolyoxygen absorption

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Embodiment 1

[0069] see figure 1 as well as figure 2 , this embodiment provides a measurement method for inverting aerosol optical properties based on tetramer oxygen absorption, and the measurement method is used to measure the optical properties of atmospheric aerosols. The measurement method of the present embodiment is based on the observation of the passive differential absorption spectrometer. 4 The method for measuring aerosol asymmetry factor and single scattering albedo for absorption research includes the following steps (step 1 to step 7).

[0070] Step 1. Select observational parameters and aerosol optical parameters to establish an atmospheric radiative transfer model (McArtim). The observation parameters selected in this embodiment include solar zenith angle, azimuth angle, observation elevation angle, azimuth angle, and aerosol optical parameters may include aerosol optical thickness, single scattering albedo, asymmetry factor, aerosol boundary layer Height and aerosol p...

Embodiment 2

[0103] This embodiment provides a measurement method for aerosol optical properties based on tetramer oxygen absorption inversion, which further refines the parametric formula of the aerosol profile on the basis of Embodiment 1. In this embodiment, since most of the aerosol is located in the boundary layer, the extinction of the aerosol is not sensitive to β, which is assumed to be a constant 5 km. In addition, if the entire height of the troposphere is set to 15km, then:

[0104]

[0105] The value of A can be solved by the above formula, and the aerosol profile can finally be expressed as:

[0106]

[0107] Of course, in some other embodiments, the parametric formula of the aerosol profile is:

[0108]

[0109] where Ht is the height of the troposphere in the atmosphere.

Embodiment 3

[0111] see Figure 9, this embodiment provides a method for measuring aerosol optical properties based on tetramer oxygen absorption inversion, which is similar to the measurement method of embodiment 1, the difference is that the ground-based passive differential absorption optical system of this embodiment is a ground-based two-dimensional multi- Axis difference system spectroscopic system (two-dimensional MAX-DOAS), and includes telescope 1, two-dimensional rotating platform 2, optical fiber bundle 3, spectrometer 4, heat preservation box 5, inclinometer 6 and electronic compass. The telescope 1 is used to receive scattered light from the sun, and deliver the processed light beam to the spectrometer 4 through the fiber bundle 3 . The telescope 1 realizes scanning observation with an elevation angle range of 0-90 degrees and an azimuth angle range of 0-360 degrees through a two-dimensional rotating platform 2 . The spectrometer 4 is set in the heat preservation box 5 and is...

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Abstract

The invention discloses a measuring method and device for inverting optical properties of aerosol based on tetrapolyoxygen absorption. The method comprises the steps of: establishing an atmospheric radiation transmission model; analyzing and calculating the sensitivity of O4 batter post concentration to aerosol optical parameters; performing parameterization expression on inversion key parametersto obtain aerosol optical parameters; substituting different atmospheric aerosol states into the atmospheric radiation transmission model, simulating O4 absorption intensity, and establishing a lookuptable; building a ground-based passive differential absorption optical system capable of performing all-sky observation; obtaining actual scattered spectrum of all-sky different angles in the atmosphere, performing passive differential absorption spectrum fitting, and measuring the actual O4 absorption intensity; and performing least square fitting on the actual measurement result and the simulation result, and performing inversion. By adopting the measuring method and device disclosed by the invention, an asymmetry factor and a single scattering albedo of the aerosol are obtained, the measurement of atmospheric extinction is realized without the need for absolute light intensity, and errors introduced by horizontal unevenness and vertical distribution difference of the aerosol are eliminated.

Description

technical field [0001] The present invention relates to a measurement method in the technical field of atmospheric aerosol observation, in particular to a measurement method based on tetramer oxygen absorption inversion of aerosol optical properties, and also relates to the application of the measurement method based on tetramer oxygen absorption inversion aerosol Measuring device for optical properties. Background technique [0002] Atmospheric aerosols are an important part of the Earth's atmospheric system. Aerosol particles can affect the Earth's atmospheric radiation budget through scattering and absorption, and ultimately affect the global climate. Because tropospheric aerosols exist for a long time and change significantly, there will be very obvious changes in radiative forcing on a regional scale. There are different types of aerosols in the atmosphere, and the aerosols in different regions are affected by the optical properties of their particles, the surface albe...

Claims

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Application Information

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IPC IPC(8): G01N15/00G01N15/06G01N21/31
CPCG01N15/00G01N15/06G01N21/31G01N15/075Y02A90/10
Inventor 牟福生李素文雒静陈浩
Owner HUAIBEI NORMAL UNIVERSITY
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