青海省海南州短时强降水雷达回波特征分析

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作者简介 辛元瑜（1988—），女，青海共和人，工程师，主要从事气象服务与应用研究。

收稿日期 2023-06-12

Analysis of Radar Echo Features of Short-term Heavy Precipitation in Hainan Qinghai Province

Xin Yuan-yu et al（Meteorological Bureau of Hainan Prefecture， Gonghe， Qinghai 813000）

Abstract Based on the data of heavy rainfall in Hainan Qinghai Province from June to September of 2017 to 2018， 13 typical cases were selected for analysis. The study applied the new generation of Doppler radar products in Hainan Qinghai Province to classify short-term heavy rainfall and summarize the main types of heavy rainfall weather in Hainan region. Indicators for radar forecast and warning of heavy rainfall in Hainan region were extracted. The radar echo shapes of short-term heavy rainfall mainly included Banded echoes， Block-shaped echoes， and Plate mixed echos. The strongest echoes generally ranged from 41 to 71.5 dBz， and during precipitation， the strongest echoes were typically maintained between 50 and 55 dBz. The appearance of a 50 dBz intensity echo indicated an intensification of precipitation， while its disappearance indicated a weakening of precipitation intensity. The average VIL （Vertically Integrated Liquid） value was 25 kg/m2， and the maximum echo top height during heavy rainfall events ranged from 11 to 18.4 km.

Key words Short-term heavy rainfall; Doppler-radar echo; Indicators

摘要 根据海南州2017—2018年6—9月强降水资料，从中归纳出13个个例进行分析，并应用海南州新一代多普勒雷达产品对短时强降水进行分类研究，总结海南州强降水天气主要类型，提炼出海南州强降水雷达预报预警的指标。（剩余3569字）