2016—2021年海南中部山区对流云系特征分析  

Characteristics of convective cloud systems in the mountainous area of central Hainan province from 2016 to 2021

作　　者：邢峰华 黄彦彬[1] 李光伟[1] 毛志远 敖杰[1] 黄光瑞[1] 黄巧明[1] XING Feng-hua;HUANG Yan-bin;LI Guang-wei;MAO Zhi-yuan;AO Jie;HUANG Guang-rui;HUANG Qiao-ming(Hainan Institute of Meteorological Science,Haikou 570203,China;Key Laboratory of South China Sea Meteorological Disaster Prevention and Mitigation of Hainan Province,Haikou 570203,China)

机构地区：[1]海南省气象科学研究所,海南海口570203 [2]海南省南海气象防灾减灾重点实验室,海南海口570203

出　　处：《气象与环境学报》2023年第2期84-91,共8页Journal of Meteorology and Environment

基　　金：海南省自然科学基金项目(421QN372);海南省气象局科研项目(hnqxZC202112)共同资助。

摘　　要：选取2016—2021年3—9月双偏振雷达数据等资料,对海南中部山区对流云系时空变化特征进行分析。结果表明:海南中部山区共951次对流云系个例,占同期海南全岛对流云系总数(4412次)的21.55%。其中,变暖高压脊和南海低压槽是相对最易引发海南中部山区对流云系的天气系统,分别发生207次和189次。3月和4月是海南中部山区对流云系在全岛对流云系总数占比最高的两个月份,占比均超过30%。13:00—17:00是海南中部山区对流云系的主要发生时段,共计发生777次。中部山区对流云系空间的移向大多为东北和东南方向,引导气流以西南和西北气流为主;其云系移动速度以6~10 km·h^(-1)及11~15 km·h^(-1)两个区间的频次最多,分别为306次和229次;云系的移动距离主要集中在11~15 km和16~20 km。山区对流云系典型个例在云系初期出现明显“ZDR柱”现象,且中低层的双偏振相关系数值较低,云系中部有强雷达回波悬垂。Using dual-polarization radar data from March to September from 2016 to 2021,the spatiotemporal variation characteristics of convective cloud systems in the mountainous area of central Hainan province were analyzed.The results show that there are 951 cases of convective cloud systems in the mountainous area of central Hainan,accounting for 21.55% of the total number of convective cloud systems in the whole islands of Hainan province during the same period(4412).Among them,the warming high-pressure ridge and the South China Sea trough are relatively easy to cause convective cloud systems in the mountainous area of central Hainan province,207 times and 189 times,respectively.March and April are the two months with the highest proportion of convective cloud systems in the mountains area of central Hainan province,both accounting for more than 30%.The main period of convective cloud systems in the mountainous area of central Hainan province is from 13:00 to 17:00,with 777 occurrences.The space of the convective cloud system in the central mountainous area mostly moves to the northeast and southeast,and the guiding air is mainly southwest and northwest.The most frequent cloud system moving velocity is 6~10 km·h^(-1) and 11~15 km·h^(-1),which are 306 times and 229 times respectively.The moving distance of the cloud systems is mainly concentrated in the 11~15 km and 16~20 km intervals,which are 26.5% and 19.2%,respectively.The typical case of convective cloud systems in the mountainous area shows an obvious"ZDR column"phenomenon at the early stage of the cloud systems,and the dual polarization phase relation value is low in the middle and low layers.There is a strong radar echo overhang in the middle of the cloud system.

关 键 词：天气系统 地形云系 双偏振雷达 

分 类 号：P426.5[天文地球—大气科学及气象学]