To Evaluate the Characteristics of Cloud Parameters Retrieved by Satellite and Cloud Structure of the Northward Typhoon In-Fa

Abstract

Cloud parameters retrieved by Satellite and model data with detailed cloud microphysical processes are used in this paper to conduct a comprehensive analysis of the precipitation process of the northward typhoon "Infa" in Hebei Province. The main conclusions are as follows: optical thickness (>20), cloud top temperature (10°C~-25°C), and cloud top height (>9km) of cloud characteristics parameters retrieved by FY-2 satellite (Fengyun meteorological satellite) have obvious indications for the range and intensity of precipitation. The effective radius of cloud particles needs to be combined with multi-parameter comprehensive analysis. Satellite monitoring products can be used to compare and correct cloud model forecast products. In the early stage of the low-pressure precipitation process of this typhoon, cold clouds are thicker, and the content of hydrometeor and supercooled water in cold clouds are abundant. After 17:00 on the 29th, the hydrometeor and supercooled water contents of cold clouds have decreased significantly and increased obviously in warm cloud, the large value center of water content have also decreased, ice crystals number concentration and snow-graupel mixing ratio have declined, and the main precipitation mechanism changed from cold cloud precipitation to warm cloud precipitation.