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。指出:短时强降水的雷达回波形状主要以带状回波、块状回波、片状混合回波为主。最强回波一般为41.0~71.5 dBz之间,降水发生时最强回波基本维持在50.0~55.0 dBz之间,50.0 dBz强度回波的出现标志着降水强度增强,消失标志着降水强度开始减弱。平均VIL值为25.0 kg/m~2;当强降水发生时配合的最大回波顶高在11.0~18.4 km之间。
Based on the data of heavy rainfall in Hainan Qinghai Province from June to September of 2017 to 2018,13typical 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 71.5dBz,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/m~2,and the maximum echo top height during heavy rainfall events ranged from 11 to 18.4 km.
作者
辛元瑜
李博
梁宁
Xin Yuan-yu(Meteorological Bureau of Hainan Prefecture,Gonghe,Qinghai 813000)
出处
《农业灾害研究》
2023年第11期122-124,共3页
Journal of Agricultural Catastrophology
关键词
短时强降水
雷达回波
指标
Short-term heavy rainfall
Doppler-radar echo
Indicators
