| 四川一次超级单体风暴的多普勒雷达观测分析 |
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| 引用本文： | 范思睿,陶丽,张恒,等.四川一次超级单体风暴的多普勒雷达观测分析[J].高原山地气象研究,2017,37(1):73-79. |
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| 作者姓名： | 范思睿 陶丽 张恒 等 |
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| 作者单位： | 1. 四川省人工影响天气办公室室, 成都 610072; |
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| 基金项目： | 公益性行业(气象)科研专项(GYHY201406032)西南区域气象中心区域重大科研业务项目(西南区域气2011-02)四川省气象局开发研究课题(川气课题2015-开发-22)四川省气象局青年基金课题(川气课题2015-青年-14)四川省气象局青年基金课题(川气课题2015-青年-18) |
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| 摘 要： | 利用常规天气资料和多普勒天气雷达等资料对2015年7月27日发生在四川资阳的一次伴随冰雹大风的超级单体进行综合分析。结果表明:(1)该超级单体具有较大的CAPE值,适宜的0℃层和-20℃层高度,有利于雹粒的增长,为大暴雨和冰雹提供了不稳定能量。(2)此次风暴具有超级单体风暴的典型特征,在雷达反射率因子上,中低层有“钩状回波”、弱回波区、三体散射长钉,中高层有回波悬垂现象,速度图上是气旋式流场,后发展为中气旋,中气旋首先出现在中低层,随后向上向下发展。(3)垂直累计液态水含量(VIL)在发生冰雹前会有一个跃增变化,在30分钟内从5kg/m2跃增到75kg/m2,VIL跃增变化提前冰雹发生,对冰雹具有警示作用。(4)三体散射长钉是预示冰雹的一个重要特征,此次风暴的三体散射出现在高度5~10km,只在2个体扫时间内出现过。
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| 关 键 词： | 超级单体风暴 VIL跃增 三体散射 钩状回波 |
| 收稿时间： | 2016-12-13 |
Analysis of Supercell Storm with Doppler Weather Radar Data |
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| Institution: | 1. Weather Modification Office of Sichuan Provincee, Chengdu 610072, China;2. Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Provincee, Chengdu 610072, China;3. Sichuan Meteorological Service Centree, Chengdu 610072, China;4. Bazhong Meteorological Office of Sichuan Province, Bazhong 636000, China;5. Neijiang Meteorological Office of Sichuan Province, Neijiang 641000, China |
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| Abstract: | Based on Chengdu Doppler Weather Radar and other conventional meteorological data, the supercell storm occurred on 27 July 2015 in the middle of Sichuan is analyzed. The result show that: (1) The value of CAPE is significantly increased and the appropriate height of 0℃ layer and-20℃ layer, which provided instability energy for storm and hail. (2) There are many supercell features of Doppler radar echo, such as hook echo, weak echo region, vault, meso-cyclone and etc. meso-cyclone appear in mid-level at first, then spread up and down. (3) It is also found that the abrupt increase of vertical integration of liquid water content (VIL) is ahead of hail, which has indicating significance on hail forecasting. (4) TBSS (three-body scattering spike) is another feature of hail forecasting, TBSS are found at 5 ~ 10 km, which only appear in two volume scan ahead of hail. |
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