| 河北中南部两次超级单体雷达特征对比分析 |
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| 引用本文： | 裴宇杰,王福侠,李云川.河北中南部两次超级单体雷达特征对比分析[J].气象科技,2006,34(Z1):99-105. |
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| 作者姓名： | 裴宇杰 王福侠 李云川 |
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| 作者单位： | 1. 河北省气象台
2. 河北省人工影响天气办公室,石家庄,050021 |
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| 摘 要： | 2004年河北省中南部地区共有17次冰雹天气过程,以6月20日和24日2次天气过程最为典型。将这2个典型个例对照天气背景和灾情,主要运用新一代多普勒天气雷达的基本反射率、平均径向速度、垂直积分液态含水量(VIL)等产品进行对比分析,发现6月20日是典型超级单体,24日呈强降水超级单体。回波强度大于等于50dBz、回波顶高大于等于10 km、垂直积分液态含水量大于等于35 kg/m2时极易降雹,冰雹落区与VIL的大值区有较好的对应关系,VIL高值维持时间越长冰雹直径越大,降雹范围越大,三体散射维持的时间越长产生的灾情越是严重。风暴相对径向速度产品上,可更早更清楚地得到对流风暴将发展加强的信息。
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| 关 键 词： | 新一代多普勒雷达 冰雹 中气旋 超级单体 |
| 修稿时间： | 2006年3月21日 |
Comparison and Analysis of Radar Echo Characteristics of Two Supercells in Hebei Province |
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| Pei Yujie,Wang Fuxia,Li Yunchuan.Comparison and Analysis of Radar Echo Characteristics of Two Supercells in Hebei Province[J].Meteorological Science and Technology,2006,34(Z1):99-105. |
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| Authors: | Pei Yujie Wang Fuxia Li Yunchuan |
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| Abstract: | Two hail weather processes occurred on 20 and 24 June 2004 in the midsouth part of Hebei Province are analyzed,which are very typical in a total of 17 hail weather processes in the area in 2004.The comparison is made between two weather processes from the weather situation,circulation background and damage by means of Doppler radar data such as the basic reflectivity,the average radial velocity,the vertical integration of liquid water content(VIL),etc.It is found out that the process on 20 June is a typical supercell and that on 24 is a supercell with accompanying severe rainfall.When the echo intensity being up to 50 dBz,the echo top up to 10 km,and the vertical integration liquid water content being 35 kg/m~2,there is high possibility of hail fall.There is good correlation between the area of hail fall and VIL value: the longer the high VIL value lasts,the greater the hail diameter is,and the greater the hail-fall area;the longer the three body scatter lasts,the more serious the disaster is.The relative radial velocity(SRM) products can be used to obtain the information about the development and intensification of convective storms more clearly and earlier. |
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| Keywords: | new generation Doppler radar hail mesocyclone supercell |
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