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The characteristics of cloud top physical quantities of severe convective clouds were analyzed by using Himawari-8 satellite data for two short-time heavy precipitation processes over Liaoning Province on September 9, 2021 (referred to as the "9.9" process) and October 3, 2021 (referred to as "10.3" process ). The results demonstrate that the range of convective clouds is wider and the value of the water vapor brightness temperature difference and infrared cloud top height of the "10.3" process are greater than those of the "9.9" process. In the "10.3" process, the top of the convective cloud is always near the troposphere or above the top of the troposphere, whereas in the "9.9" process, it is only in the initial and mature stages of convection. The physical features of cloud tops can be used to determine the life cycle of cloud masses. Strong convective clouds are already visible in the early stages of convection, and both the rate of cloud growth and the rate of decline in infrared brightness temperature are faster in the beginning stage than in the mature stage. The early stage of cloud production, on the side of the low-level inflow area, has the most pronounced cooling area. As a result, the cloud body's optical thickness grows at this point, and the freezing process for water clouds starts to take place. In the stage of cloud maturity, the height of the cloud top achieves its highest point, and in comparison to the early stage, the optical thickness, density of water or ice cloud particles, and cloud height all diminish.
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