Band conversion method and system for atmospheric extinction coefficient in mild haze

Abstract

The invention relates to a band conversion method and system for an atmospheric extinction coefficient in the mild haze. The method comprises steps that aerosol optical property measurement is carriedout through employing a laser radar and a solar photometer, and laser radar data and solar photometer data are acquired; the optical atmosphere thickness is acquired through inversion based on the solar photometer data, aerosol particle spectrum distribution of the lower atmosphere is acquired through inversion by employing the extinction method, and an extinction coefficient when the wavelengthmatches the emission laser wavelength of the laser radar is calculated; the extinction coefficient corresponding to the lower atmosphere is calculated according to the laser radar data; the extinctioncoefficient calculated based on the solar photometer data is compared with the extinction coefficient calculated based on the laser radar data, if yes, the extinction coefficient of each wavelength is calculated based on aerosol particle spectral distribution of the lower atmosphere, and band conversion for the extinction coefficient is realized. The method is advantaged in that in combination with the measurement data of the laser radar and the solar photometer, band conversion for the extinction coefficient is realized, and error reduction is realized through data comparison.

Description

technical field [0001] The invention relates to the technical field of atmospheric optics, in particular to a method and system for converting the bands of atmospheric extinction coefficients during mild haze. Background technique [0002] Smog is a common weather phenomenon. It is caused by the fact that the total amount of particulate matter and nitrogen oxides contained in the air exceeds the normal level, resulting in cloudy air and reduced visibility. The impact of smog on the atmosphere is directly related to the distribution of its aerosol particles. For haze weather, both the concentration of small particles and the concentration of large particles in the air are much larger than normal weather. Compared with foggy days, the concentration of small aerosol particles in haze days is greater than that in foggy days, and the concentration of large aerosol particles in haze days is much smaller than that in foggy days. [0003] The atmospheric extinction coefficient can...

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Problems solved by technology

But the problem is that the atmospheric extinction coefficient obtained at this time is related to the wavelength of the lidar, and the atmospheric extinction coefficient of other bands cannot be obtained directly.

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