| 基于雷达和卫星资料对一次冰雹天气过程的中尺度特征分析 |
| Analysis on mesoscale characteristics of a hailstorm case based on the Radar and Satellite data |
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| DOI： |
| 中文关键词: 冰雹 中尺度特征 多普勒天气雷达 卫星资料 |
| 英文关键词:hail Mesoscale features Doppler weather radar Satellite data |
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| 中文摘要: |
| 本文利用多普勒天气雷达资料以及FY2D逐小时亮温（TBB）资料对2015年4月28日发生在苏皖地区的一次冰雹天气过程进行分析研究，结果表明：（1）利用多普勒天气雷达资料分析可知，此次冰雹天气是由超级单体风暴造成的，这次风暴不但发展的非常强烈并且持续时间较长，13时左右对流风暴产生，16时45分左右对流风暴发展成为超级单体，从22时02分开始，超级单体逐渐减弱并向东南沿海方向移去。另外，0℃层高度为3.7km左右，-20℃层高度为7.0km左右，反射率因子强度达到50dBZ的区域伸展到了-20℃高度以上，表明有产生大冰雹的可能性。（2）利用FY2D逐小时亮温（TBB）资料分析可得，此次中尺度对流风暴云团产生于中午13时，并于24时减弱入海，而后消失。冷云中心TBB最小值达到-60℃，与实际降雹区域进行比较可得，降雹发生在亮温梯度较大的区域。 |
| 英文摘要: |
| This study has analyzed a case of hailstorm over Jiangsu-Anhui area on 28 April 2015 by using Doppler Radar data and hourly FY2D TBB satellite data. The results show that: (1)Based on the Doppler Radar data, the hailstorm stemmed from a supercell storm with strong intensity and long lifetime. The convective storm generated at 13:00 BJT and grew to a supercell storm until 16:45 BJT. After 22:02 BJT the supercell storm weakened gradually as it moved toward southeast coast. In addition, the 0℃ and -20℃ layers located at the height of 3.7km and 7.0km respectively. The region of reflectivity intensity up to 50 dBZ stretched upward beyond the -20℃ layer, which indicate high occurrence probability of strong hailstorm. (2) Based on hourly FY2D TBB satellite data, a mesoscale convective storm generated at 13:00 BJT, then weakened and moved to sea at 24:00 BJT. After that it dissipated on the sea. Corresponding the hail region, the minimum TBB reached to -60℃ at the center of cold cloud and the hailstorm tended to generate in the area with larger TBB gradient. |
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