主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2016, Vol. 32 ›› Issue (3): 41-46.doi: 10.3969/j.issn.1673-503X.2016.03.006

• 论文 • 上一篇    下一篇

东北冷涡暴雨落区统计与诊断分析

徐红1, 晁华1, 王文2, 陈军庆3   

  1. 1. 沈阳区域气候中心, 辽宁 沈阳 110166;
    2. 南京信息工程大学, 江苏 南京 210144;
    3. 北部战区空军气象中心, 辽宁 沈阳 110000
  • 收稿日期:2015-02-09 修回日期:2015-08-14 出版日期:2016-06-30 发布日期:2016-06-30
  • 作者简介:徐红,女,1986年生,工程师,主要从事气候资源开发与利用研究,E-mail:lnqxny@163.com
  • 基金资助:

    国家自然科学基金项目(41275091)资助。

Statistic and diagnosis of storm rainfall areas based on the Northeast Cold Vortex cases

XU Hong1, CHAO Hua1, WANG Wen2, CHEN Jun-qing3   

  1. 1. Regional Climate Center of Shenyang, Shenyang 110166, China;
    2. Nanjing University of Information Science & Technology, Nanjing 210144, China;
    3. Air Force Meteorologial Center of North Theatre, Shenyang 110000, China
  • Received:2015-02-09 Revised:2015-08-14 Online:2016-06-30 Published:2016-06-30

摘要:

选取2008-2011年35个东北冷涡个例,利用Micaps实况资料对东北冷涡暴雨落区进行统计和诊断分析。结果表明:2008-2011年东北冷涡暴雨最易发生在冷涡的第Ⅱ和第Ⅲ象限内,第Ⅱ象限中有吉林省中部地区、中朝边境和辽东半岛3个暴雨落区高概率区,样本概率值最大达0.6;第Ⅲ象限中有河北省北部1个暴雨落区高概率区,样本概率值为0.5。基于NCEP/NCAR再分析资料,利用合成分析法,以动力学条件和热力学条件为诊断量,对比实况暴雨落区概率分布可知,东北冷涡形成时,低空存在明显天气尺度的水汽输送带,水汽辐合形成了较明显的湿舌,暴雨落区位于湿舌舌尖的位置上;水汽通量散度、矢量散度和湿位涡对东北冷涡暴雨落区的短时预报指示效果较好,特别是在东北冷涡的第Ⅰ、第Ⅱ及第Ⅲ象限内,诊断量大值中心与暴雨高概率区基本重合。

关键词: 东北冷涡, 暴雨落区, 概率分布, 诊断量

Abstract:

Based on 35 Northeast Cold Vortex cases during 2008-2011 and Micaps observation data,the statistic and diagnosis for storm rainfall areas of Northeast Cold Vortex were carried out.The results indicate that most of storm rainfalls occur in the Ⅱand Ⅲ quadrants.There are three high probability areas with storm rainfall in theⅡquadrant.The three areas include the middle part of Jilin province,the borders of China and Korea and Liaodong Peninsula with the maximum probability of 0.6.There is only one high probability area (the North of Hebei province) in the Ⅲ quadrant with probability of 0.5.Furthermore,based on the NCEP/NCAR reanalysis data and the method of composite analysis with the diagnostic values of dynamic conditions and thermal conditions,the distribution of probability of storm rainfall areas are compared.The above analysis shows that there is an obvious transportation of water vapor belt on synoptic scale at low altitudes when the Northeast Cold Vortex is forming.At the same time,a clear wet tongue is formed when water vapor convergence together and the storm rainfall tends to occur on the tip of the wet tongue.Moisture flux divergence, vector divergence and moisture potential vorticity could be factors for satisfactional forecast of the storm rainfall areas and the areas with high diagnostic value coincide with the high probability areas of storm rainfall,especially in the I,Ⅱ and Ⅲ quadrants of the Northeast Cold Vortex.

Key words: Northeast Cold Vortex, Storm rainfall areas, Probability distribution, Diagnosis

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