A Measuring Instrument for Atmospheric Aerosol Hygroscopicity and Body Angle Scattering Coefficient

Abstract

The invention discloses an instrument for measuring the moisture absorption characteristic and the body angle scattering coefficient of an atmospheric aerosol, which belongs to the technical field of atmospheric monitoring and meteorological monitoring equipment and is used for monitoring gas and aerosols in the environment. According to the technical scheme, the instrument consists of a sampler, a water vapor generator, a gas supply device and a detector, wherein gas enters a humidification tube and a direct detection tube respectively through the sampler; after gas entering the humidification tube is humidified, the gas is charged into the detector and is used for measuring the light scattering coefficient of the aerosol; the detector drives a light blocking sheet to rotate according to a set program through a stepping motor, and then light emitted from a light source at a certain angle is blocked, so that the body angle scattering coefficient can be detected; the water vapor generator and the gas supply device can provide different detection humidity. The instrument can be used for continuously and automatically measuring optical characteristics such as the body angle scattering coefficient of the aerosol by simulating different humidity conditions, is applicable to monitoring of environment air quality, observation of meteorological conditions, research on climatic variation and research on the optical characteristics of the aerosol, and has remarkable economic and social benefits.

Description

Technical field [0001] The invention relates to an instrument for real-time and automatic monitoring of body angle scattering coefficients before and after moisture absorption of atmospheric aerosols, and belongs to the field of environmental monitoring and meteorological monitoring equipment. Background technique [0002] Global warming has had a major impact on the global environment on which we depend for survival, and its extensiveness and complexity have attracted the attention of countries all over the world. There are many factors that cause global change or climate change, and these different types and directions of changes will affect the earth's radiation balance. The warming of the earth mainly depends on solar radiation entering the atmosphere, and part of the solar radiation enters the atmosphere and is scattered into space. Monitoring the amount of backscattered solar radiation is of great significance for studying changes in the earth's radiation balance. [0003] ...

AI Technical Summary

Problems solved by technology

At present, domestic aerosol scattering coefficient monitoring instruments only measure part of the scattering coefficient of the aerosol, such as the back scattering coefficient, the total scattering coefficient or the forward scattering coefficient. The scattering coefficient is measured at the same time as the body angle scattering coefficient

In addition, aerosols have strong hygroscopic properties, and the impact on atmospheric visibility before and after moisture absorption is completely different. Current monitoring instruments use heating to reduce relative humidity to overcome the influence of humidity on aerosol scattering coefficients, but they have not been used to simulate different humidity. Aerosol Scattering Coefficient Meter

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