Off-line detection device of ice nucleus concentration and ice formation activity under nucleus infiltration mode and method thereof

Abstract

The invention discloses an off-line detection device and measurement method for ice nuclei concentration and ice-forming activity in the mode of infiltrating nuclei, comprising: a liquid separator, a PCR plate, a PCR bracket, a water bath, a computer, a lens, and a CCD camera; Temperature control, temperature recording, picture acquisition and data processing modules; the PCR plate is placed on the PCR support, and together with the PCR support is placed in the condensate in the water bath; the water bath and CCD camera are connected to the computer; through picture collection The module controls image acquisition, image storage, and data processing. The invention realizes that the liquid holding tank can hold more liquid droplets; reduces the loss of particles to be tested; adopts the PCR board to reduce the problem of mutual influence of liquid droplets in the cooling process, increases the volume of liquid droplets that can be measured, and reduces the The difficulty of liquid, reducing the error caused by inaccurate quantification of droplet volume. The invention is easy to operate, and can simultaneously perform temperature recording, image acquisition and data processing.

Description

technical field [0001] The invention belongs to the technical field of atmospheric physical measurement, relates to cloud ice nuclei measurement technology, and in particular relates to an off-line detection device and detection method for atmospheric ice nuclei concentration and particulate matter ice-forming activity in an infiltration mode. Background technique [0002] Atmospheric ice nuclei refer to aerosol particles in the atmosphere that can cause water vapor to evaporate to produce desublimation or supercooled water droplets to freeze to form ice crystals. Particulate matter emitted by man-made or natural processes can act as ice nuclei, thereby affecting the number and size of ice crystals formed in mixed clouds and high clouds, further affecting the microphysical processes, existing forms, and lifespan of clouds, and ultimately plays a vital role in global radiation and hydrological cycles. influences. Therefore, measuring the concentration of ice nuclei in the at...

AI Technical Summary

Problems solved by technology

[0007] (2) During the implementation process, the number of droplets that can be measured at one time is too small. When calculating the proportion of frozen droplets to the total droplets at each temperature, the uncertainty that can be introduced by a single droplet is very large, so that the corresponding Inaccurate estimation of the concentration of ice nuclei at freezing temperatures

[0008] (3) After membrane sampling is performed on the atmosphere, it is difficult for particulate matter to be completely extracted from the membrane, which may lead to low measurement results

[0009] (4) Lack of software for recording temperature and pictures at the same time, lack of data calculation software for judging the proportion of frozen droplets to total droplets at each temperature

[0010] (5) The sample holding range of the existing traditional cold and hot table is relatively small, about 10-20cm 2 , so that the volume of the droplet required for droplet measurement is required to be small, about a few microliters, and there may be errors in the volume quantification of the droplet

Images