| 广州短时大暴雨多普勒特征和成因分析 |
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| 引用本文： | 伍志方,易爱民,叶爱芬,张东.广州短时大暴雨多普勒特征和成因分析[J].气象科技,2006,34(4):455-459. |
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| 作者姓名： | 伍志方 易爱民 叶爱芬 张东 |
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| 作者单位： | 广州中心气象台,广州,510080 |
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| 基金项目： | 广东省科技厅课题(2003C32607)，广东省气象局重点项目(200301)共同资助 |
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| 摘 要： | 利用广州CINRAD-SA新一代天气雷达各种产品,对发生在广州市的一次短时大暴雨的多普勒特征进行了详细分析,同时分析了该过程的天气特征及其变化,探讨了短时大暴雨的成因。结果表明:此次短时大暴雨产生于低空急流、低层辐合、高层辐散的强抽吸作用的有利环流背景下,由多个单体排列成与单体移动方向一致的走向,依次穿越同一地区造成的。强度最强、强回波维持时间最长的单体同时伴有弱中气旋特征,并与强降水发生区域相对应。逆风区对对流的维持和加强起到了十分重要的作用。
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| 关 键 词： | 新一代天气雷达 短时大暴雨 多普勒特征 |
| 收稿时间： | 2005-03-28 |
| 修稿时间： | 2005-07-05 |
Formation Mechanism Analysis of Very-Short-Range Torrential Rains in Guangzhou Based on CINRAD-SA Radar |
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| Wu Zhifang,Yi Aiming,Ye Aifen,Zhang Dong.Formation Mechanism Analysis of Very-Short-Range Torrential Rains in Guangzhou Based on CINRAD-SA Radar[J].Meteorological Science and Technology,2006,34(4):455-459. |
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| Authors: | Wu Zhifang Yi Aiming Ye Aifen Zhang Dong |
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| Institution: | Guangzhou Central Meteorological Office, Guangzhou 510080 |
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| Abstract: | An overview of the weather conditions associated with the very-short-range torrential rains in Guangzhou is presented,with emphasis on the evolution of environmental and several storm-cell's Doppler characteristics relevant to the forecasting of heavy rains,using data from a new generation Doppler weather radar(CINRAD-SA) in Guangzhou and conventional weather observation networks.The formation mechanisms of the torrential rains are investigated.It is found that this severe rainstorm case occurred in the favorable synoptic conditions with the multi-cell echo band orientated from northeast to southwest,being consistent with its moving direction.The weak mesocyclone features are found in the strongest cell with the longest life time.The "inverse-wind region" played an important role in the development and maintenance of convection. |
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| Keywords: | CINRAD-SA very-short-range torrential rain Doppler characteristic |
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