Detection device and system for nucleation of atmospheric ice nucleus

Abstract

The invention discloses a detection device and system for nucleation of an atmospheric ice nucleus. The detection device comprises a humidity control component, an image acquisition component, a temperature control component and a cooling table, wherein the cooling table comprises an upper-layer cooling table cover, a lower-layer cooling table cover and a cavity; a transparent glass sheet is arranged at the top part of the upper-layer cooling table cover; a chamber is formed between the upper-layer cooling table cover and the lower-layer cooling table cover; a cavity is arranged below the lower-layer cooling table cover, and a copper table is arranged in the cavity; a hydrophobic silicon wafer for bearing a sample is arranged at the top part of the copper table, and a vent hole is formed in the lower-layer cooling table cover so that the cavity can be communicated with the hydrophobic silicon wafer; the humidity control component is connected with the chamber through a connecting piece so as to adjust humidity; a first groove is formed in the copper table, and the temperature control component is arranged in the first groove to adjust the temperature; and the image acquisition component is arranged above the transparent glass sheet so as to acquire images of the hydrophobic silicon wafer in real time through the transparent glass sheet and the vent holes. According to the detection device and the system, the temperature and relative humidity of ice crystals formed by nucleation of atmospheric particulates as ice nuclei can be detected.

Description

technical field [0001] The invention relates to the technical field of atmospheric physical observation, in particular to a detection device and system for nucleation of atmospheric ice nuclei. Background technique [0002] Atmospheric ice nuclei are particles in the atmosphere that can cause water vapor to condense or supercooled water droplets to freeze to form ice crystals. Aerosol particles can participate in the heterogeneous nucleation process of supercooled liquid droplets as ice nuclei, affecting and changing the microphysics, lifespan and precipitation efficiency of clouds, thereby affecting the radiation balance and energy budget of the earth system, and indirectly affecting the global climate. effect. Therefore, measuring the nucleation conditions of ice nuclei in the atmosphere can improve the understanding of cloud microphysical processes, deepen the understanding of indirect climate effects of aerosols, and improve the accuracy of climate prediction models. ...

AI Technical Summary

Problems solved by technology

The current cold stage device still has the following deficiencies: 1) The cold stage method mainly focuses on the measurement in the infiltration freezing mode, and most of them cannot realize the determination of ice nuclei in the lower temperature desublimation freezing mode; A device that precisely controls temperature and relative humidity at the same time in freezing mode; 3) The measurement temperature range is narrow, generally higher than 235K

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