基于CAPPI的赣东北暴雨三维回波特征分析

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Abstract In order to deeply analyze the three-dimensional echo structure of Rainstorm in Northeast Jiangxi and get familiar with the characteristics of rainstorm echo CAPPI,this paper uses the "Tianyan" radar mosaic product to analyze the rainstorm process in Northeast Jiangxi from May 4 to 5,2025.The results show that the swing of stationary front in Jiangxi is the most important rainstorm weather situation,but the radiosonde data index of rainstorm process is less violent than that of hail process.The rainstorm in Northeast Jiangxi is a thunderstorm echo zone with an approximate East-West trend.The echo that produces short-term heavy rainfall is a tight echo short band.Although the CR and VIL intensity(≤55 dBZ and ≤20 kg/m²) are not as strong as the hail echo(≥60 dBZ and ≥60 kg/m²),the continuous precipitation time of the echo short band is longer,which can also form rainstorm or heavy rainstorm.The short band combined reflectivity of Jingdezhen rainstorm echo is 55 dBZ,the maximum vertical integrated liquid water content is 20 kg/m²,the minimum is 15 kg/m²,and the average is 17.5 kg/m².The average extension height of 50-55 dBZ echo is 5.4 km,and 55 dBZ strong echo at 3 km altitude.The above research results provide an analysis basis for correctly identifying and judging whether short-term heavy rainfall can occur,so as to release rainstorm warning and forecast in advance.

Key words： rainstorm in northeastern Jiangxi CAPPI echo characteristics

Received: 24 December 2025

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	Sheng Mengting

Cite this article:

Sheng Mengting. Analysis of three-dimensional echo characteristics of rainstorm in northeastern Jiangxi based on CAPPI[J]. Meteorological Hydrological and Marine Instrument, 2026, 43(1): 111-114.

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http://www.qxswhy.com/EN/ OR http://www.qxswhy.com/EN/Y2026/V43/I1/111

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