| “6.3”区域致灾雷暴大风形成及维持原因分析 |
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| 引用本文： | 王秀明,俞小鼎,周小刚,牛淑贞.“6.3”区域致灾雷暴大风形成及维持原因分析[J].高原气象,2012,31(2):504-514. |
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| 作者姓名： | 王秀明 俞小鼎 周小刚 牛淑贞 |
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| 作者单位： | 1. 中国气象局气象干部培训学院,北京,100081
2. 河南省气象台,河南郑州,450003 |
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| 基金项目： | 国家自然科学基金资助项目，气象行业专项 |
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| 摘 要： | 利用商丘和郑州雷达资料,结合地面加密观测等多种资料,分析了2009年6月3日傍晚至次日凌晨,河南商丘、安徽和江苏北部出现的大范围致灾雷暴大风。本文分两个阶段从中尺度环境、风暴结构、风暴与环境相互作用、雷暴间相互作用的角度对商丘风暴的发展、维持及灾害性大风成因进行了深入探讨,得到以下结论:(1)商丘雷暴大风环境类似美国暖季型Derecho环境;(2)商丘风暴由晋冀雷暴群下沉气流导致的出流阵风锋移动到水汽相对充沛处触发,在有利的环境条件下迅速发展成具有较强的中层径向辐合超级单体风暴,多个超级单体的强下沉气流合并产生了超级单体阶段的地面大风;(3)飑线发展、维持的原因是飑线的自组织结构,飑线与环境入流的相互作用既有利于强上升气流发展,亦有利于强下沉气流发展,干线及叠加在干线上扰动触发的新生回波带不断并入飑线北端;(4)根据径向速度增幅估计,风暴强下沉气流辐散、强冷池密度流和层状云部分降水粒子蒸发对弓形回波阶段地面灾害性大风的增幅作用几乎相当,冷池合并是商丘极端雷暴大风产生的重要原因。
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| 关 键 词： | 雷暴大风 强对流 弓形回波 下击暴流 |
Study on the Formation and Evolution of ‘6.3’ Damage Wind |
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| WANG Xiu-ming,YU Xiao-ding,ZHOU Xiao-gang,NIU Shu-zhen.Study on the Formation and Evolution of ‘6.3’ Damage Wind[J].Plateau Meteorology,2012,31(2):504-514. |
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| Authors: | WANG Xiu-ming YU Xiao-ding ZHOU Xiao-gang NIU Shu-zhen |
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| Institution: | 1.China Meteorological Administration Training Center,Beijing 100081,China; 2.Henan Meteorological Observatory,Zhengzhou 450003,China) |
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| Abstract: | A damage wind event occurred on 3 June 2009 over an extensive area,which cause great damage and casualty in Shangqiu and North of Anhui and Jiangsu Province.The convective storm develops from superscell to bow echo squall line,severe convection last more than seven hours.It′s hard to forecast the storm′s evolution and the surface damage wind.The mesocale environment,the storm structure and the interaction between storm and circumstances are analyzed,the results are as follows:(1) The mesoscale circumstances are favorable for ’Derecho’ where Shangqiu damage wind occurred.(2) Shangqiu wind storm is triggered by gust front of old thunderstorm clusters,when it moves to the place in where is enough moisture.Storm quickly developed into supercell storm with strong middle altitude radial velocity.The surface wind damage was driven by downdrafts incorporation of multi-supercell;(3) The reasons of strong long-life squall line are self-organization structure of squall line;interaction between squall line and surrounding inflow jet;incorporation of line-shape cumulus which was triggered by dryline and overlapped disturbances again and again;(4) The damage winds of bow echo are driven by strong downdraft divergence flow,strong cold pool outflow and evaporation of stratus hydrometeors.From estimate of radial velocity it can see that the effect of these three elements is almost equal.The incorporation of cold pool plays an important role of damage wind in Yongcheng. |
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| Keywords: | Strong thunderstorm wind Severe convection Bow echo Downburst |
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