Russian Meteorology and Hydrology ( IF 0.7 ) Pub Date : 2020-12-02 , DOI: 10.3103/s1068373920090010 V. B. Popov , A. A. Sin’kevich , J. Yang , Yu. P. Mikhailovskii , M. L. Toropova , Yu. A. Dovgalyuk , N. E. Veremei , D. S. Starykh
Abstract
The characteristics of the сumulonimbus cloud with waterspout that has passed over the Gulf of Finland are analyzed. The characteristics were obtained from polarimetric Doppler weather radar, radiometer, and lightning detector data. The waterspout was formed close to the cyclone center. The analysis of instability indices revealed high atmospheric instability. The sinking of the rotational motion in the cloud before the waterspout generation is shown. The radar characteristics of the cloud at the moment of waterspout observation are considered in detail. It is concluded that good identifiers for the waterspout detection are the “Zdr column” and the zone in the lower part of the cloud with differently directed values of Doppler velocity and with the high values of velocity spectrum width.
中文翻译:
芬兰湾上积水的积雨云的特征和结构
摘要
分析了经过芬兰湾的带有喷水的雨水云。这些特性是从极化多普勒天气雷达,辐射计和闪电探测器数据获得的。喷水嘴在旋风中心附近形成。不稳定指数分析表明,大气不稳定程度很高。示出了旋转运动产生之前云中旋转运动的下沉。详细介绍了注水观测时云的雷达特征。结论是,用于水喷淋检测的良好标识符是“ Z dr列”和云下部的区域,其多普勒速度的方向值不同,而速度谱宽度的值较高。