2016年7月24日宁夏中北部暴雨螺旋度特征分析  

Analysis of Helicosity Characteristics of Rainstorm on July 24,2016 in Ningxia

作　　者：李婷[1,2,3] 葛森[1,2,3] 王勇 肖艳红 谭志强 何劲夫[1,2,3] LI Ting;GE Sen;WANG Yong;XIAO Yanhong;TAN Zhiqiang;HE Jingfu(Key Laboratory of Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions, China Meteorological Administration, Yinchuan 750002, China;Key Laboratory of Meteorological Disaster Prevention and Mitigation in Ningxia,Yinchuan 750002, China;Ningxia Meteorological Observatory, Yinchuan 750002, China;Ningxia Meteorolgical Observatory, Observation and Network Office, Yinchuan 750002,China)

机构地区：[1]中国气象局旱区特色农业气象灾害监测预警与风险管理重点实验室,宁夏银川750002 [2]宁夏气象防灾减灾重点实验室,宁夏银川750002 [3]宁夏气象台,宁夏银川750002 [4]宁夏气象局观测与网络处,宁夏银川750002

出　　处：《宁夏工程技术》2019年第1期23-27,共5页Ningxia Engineering Technology

摘　　要：利用宁夏加密自动站观测资料、欧洲中心格点再分析资料等气象资料,对2016年7月24日宁夏全区性强降水天气过程的螺旋度特征进行分析。结果表明,对流层中低层的垂直螺旋度与强降水的强弱变化有良好的对应关系,强降水区对应600 hPa正垂直螺旋度的强梯度区;正水平螺旋度的发展对强降水有预示性;强降水落区与700 hPa水平螺旋度强度正极值区有较好的对应关系。Abstract: Based on conventional meteorological observation data, mesoscale automatic weather station data and NC reanalysis data, the characteristics of helicity for the severe convection weather occurred in total Ningxia province on 24 July in 2016 was analyzed using statistical analysis methods. The results show that the vertical helicity of the middle and lower troposphere has indicative function to the intensity of rainfall activity. The heavy rainfall zone corresponds to the strong gradient region of vertical helicity at 600 hPa. The horizontal helicity has prediction ability in some extent of heavy precipitation occurrence. Simultaneously, the positive horizontal helicity at 700 hPa corresponds better with the area of strong rainfall.

关 键 词：水平螺旋度 垂直螺旋度 暴雨 

分 类 号：P458.1[天文地球—大气科学及气象学]