Estimation of Convective Rainfall from Lightning Observations
Estimation of Convective Rainfall from Lightning Observations
复制标题
根据闪电观测估计对流降雨
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
M. Dixon
中科院分区：
文献类型：
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作者：
A. Tapia;J. Smith;M. Dixon
摘要：本研究的目的是发展一种利用闪电观测来估计对流降雨的技术。建立了一个估算雨量的框架，其中的关键要素是：1)降雨闪电比，即每云对地闪电的对流降雨质量；2)降雨相对于闪点的空间分布；3)降雨相对于闪电发生时间的时间分布。通过对1992年8月和1993年8月在佛罗里达州墨尔本WSR-88D雷达覆盖范围内的22次夏季雷暴的研究，对这三个要素进行了检验。分析是通过将国家闪电探测网的闪电观测与使用雷暴识别跟踪和临近预报风暴跟踪和分析算法从三维反射率观测计算的风暴参数相结合进行的。主要对流状态对雷电关系变率的影响。
Abstract The objective of this study is to develop a technique to use lightning observations for estimating convective rainfall. A framework for rainfall estimation is developed in which key elements are 1) the rainfall–lightning ratio, that is, the convective rainfall mass per cloud-to-ground lightning flash; 2) the spatial distribution of rainfall relative to flash locations; and 3) the temporal distribution of rainfall relative to the time of lightning occurrence. These three elements are examined through a study of 22 summer thunderstorms in the domain covered by the Melbourne, Florida, WSR-88D radar during August of 1992 and 1993. The analyses are carried out by combining lightning observations from the National Lightning Detection Network with storm parameters computed from 3D reflectivity observations using the Thunderstorm Identification Tracking and Nowcasting storm-tracking and analysis algorithms. The effect of the prevailing convective regime on the variability of lightning–rainfall relationsh...