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 ›› 2013, Vol. 29 ›› Issue (3): 8-14.doi:

• 论文 • 上一篇    下一篇

河北省一次回流暴雪的数值模拟

宋晓辉1 田利庆2 田秀霞1 马鸿青3 张功文1 董方亮1   

  1. 1.邯郸市气象局,河北 邯郸 056001;2.河北省气象局,河北 石家庄 050021;3.保定市气象局,河北 保定 071000
  • 出版日期:2013-06-29 发布日期:2013-06-29

Numerical simulation on a return-flow snowstorm process in Hebei province

SONG Xiao-hui1 TIAN Li-qing2 TIAN Xiu-xia1 MA Hong-qing3 ZHANG Gong-wen1 DONG Fang-liang1   

  1. 1. Handan Meteorological Service, Handan 056001, China; 2. Hebei Meteorological Service, Shijiazhang 050021, China; 3. Baoding Meteorological Service, Baoding 071000, China
  • Online:2013-06-29 Published:2013-06-29

摘要: 应用WRFV3.2.1中尺度数值模式,利用每日4次1°×1°的NCEP-FNL全球分析场资料,对2009年11月9—12日河北省回流暴雪过程进行数值模拟,并利用模式输出的时空分辨率较高的资料,对冷流暴雪特征及其物理机制进行分析。结果表明:暴雪区近地层为干冷气团形成的冷垫,暖湿气流沿锋面上界自低层向高层输送,暴雪的出现与高温高湿能量的输送密切相关,水汽主要来自南方|近地层以辐散和反气旋性涡度为主,上升运动的加强与中尺度对流云团的活动相对应,太行山的地形影响使降水强度加大。

关键词: 回流暴雪, 数值模拟, 诊断分析

Abstract: Using the WRFV3.2.1 mesoscale numerical model, a return-flow snowstorm process occurred on November 9-12, 2009 in Hebei province was analyzed based on the 1°×1°NCEP-FNL reanalysis data four times a day. The characters of the return-flow snowstorm and its physical mechanism were discussed according to the products from the above model. The results indicate that the surface ground is cold cushion generated by dry and cold air mass. The warm-wet airflow transports from the lower level to upper level along the upper boundary of front surface. The occurrence of snowstorm is related with transportation of high temperature and high humidity energy, and water vapor is mainly from the south. Anticyclone and divergence area is main area near the ground surface, and strength of ascending motion?corresponds to?the activities of?mesoscale convective cloud mass.  The rainfall intensity increases because of the effect of topography of Taihang Mountain

Key words: Return-flow snowstorm, Numerical simulation, Diagnostic analysis