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| 2005年6月广东特大暴雨垂直螺旋度分析 | |
| 引用本文： | 尤红,姜丽萍,彭端,夏冠聪.2005年6月广东特大暴雨垂直螺旋度分析[J].气象,2007,33(4):71-76. |
| 作者姓名： | 尤红 姜丽萍 彭端 夏冠聪 |
| 作者单位： | 1. 云南大学大气科学系,昆明,650091;云南省玉溪市气象台 2. 广东省中山市气象台 3. 广东省肇庆市气象台 |
| 摘 要： | 利用NCEP1°×1°格点资料和常规观测资料对2005年6月广东发生的连续性特大暴雨过程进行垂直螺旋度诊断分析，结果表明：广东特大暴雨范围、强度与该地区上空中低层正、高层负垂直螺旋度中心迅速增大、减小密切相关，并和中心增大、减小区域也有很好的对应关系。当中低层正螺旋度迅速增大，高层负螺旋度迅速减小或中低层正、高层负螺旋度中心增大、减小区重叠在同一经度或纬度线附近时，对应地面雨强最强和强降水范围最大。过程中龙门连续两天特大暴雨和广东最多暴雨日出现期间，其上空垂直螺旋度对应有中低层正、高层负螺旋度闭合中心向低层明显传送的特征。 |
| 关 键 词： | 特大暴雨 垂直螺旋度 传送 分析 |
| 收稿时间： | 2006/3/15 0:00:00 |
| 修稿时间： | 2006-03-152006-12-30 |
Analysis of Vertical Helicity for "05.6" Heavy Rainstorm Process over Guangdong |
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| You Hong,Jiang Liping,Peng Duan and Xia Guancong.Analysis of Vertical Helicity for "05.6" Heavy Rainstorm Process over Guangdong[J].Meteorological Monthly,2007,33(4):71-76. | |
| Authors: | You Hong Jiang Liping Peng Duan and Xia Guancong |
| Institution: | 1. Department of Atmosphereic Science, Yunnan University, Kunming 650091 ; 2. Yuxi Meteorological Observatory, Yunnan Province; 3. Zhongshan Meteorological Observatory, Guangdong Province; 4. Zhaoqing Meteorological Observatory, Guangdong Province |
| Abstract: | Using the NCEP grid 1°×1° data and convection observational data, The vertica l helicity was applied to analyze heavy rainstorm processe, which occurred in Ju ne, 2005 over Guangdong. The results of diagnostic analyses show that both the r apidly strengthening trend of the value in positive center of the vertical helic ity at lower level and the rapidly lessening trend of the negative one at upper level during the rainstorm can reflect the position and intensity of the heavy r ainstorm in Guangdong. When the value in negative center of hp at upper level ra pidly reduced and the positive one at lower level rapidly increased, and when th e region of both the positive helicity center turning strong and the negative on e turning poor overlapped near t he same longitudeor latitude, the rainfall over the corresponding region reached the maximum and the intensity of the rainstorm reached the strongest. During the heavy rainfall which is never suffered in a c entury in Longmen and the most heavy rainfall days in Guangdong, positive vertic al helicity center at the lower level troposphere and negative one at the uppe r troposphere tends downwards to the low level. |
| Keywords: | heavy rainstorm over vertical helicity propagation diagnostic analysis |
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