A simple method for estimating convective rain volume over an area
A simple method for estimating convective rain volume over an area
复制标题
估算某个地区对流雨量的简单方法
DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
S. Sengupta
中科院分区：
文献类型：
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作者：
A. Doneaud;Paul L. Smith;A. Dennis;S. Sengupta
之前的作者报告说，对流阵雨或风暴的水平范围与其产生的降雨量之间存在显着相关性。本文采用这一想法，通过仅考虑降水的水平范围和持续时间，开发了一种估算对流降雨的简化方法。本分析基于北达科他州西部地区的雨量计和雷达数据。对雷达雨量估计进行了天气调整。一个称为综合降雨覆盖范围的量可以根据雨量计或雷达数据计算出来，并且被发现与雨量有很好的相关性。一小时内任何一次扫描期间的最大回波面积似乎是与雨量最相关的每小时雷达测量值。这项有限的研究表明，简化方法的准确性接近使用雷达反射率数据的方法，并且在某些特殊情况下可能具有操作价值。
Previous authors have reported significant correlations between the horizontal extent of convective showers or storms and the volume of rain they produce. This paper employs that idea to develop a simplified method for estimating convective rainfall by considering only the horizontal extent and duration of the precipitation. The present analysis is based on rain gage and radar data from an area in western North Dakota. A synoptic adjustment is applied to the radar rain volume estimates. A quantity called the integrated rainfall coverage can be calculated from either gage or radar data and is found to be well correlated with the rain volumes. The maximum echo area during any one scan in one hour seems to be the hourly radar measurement best correlated with the rain volumes. This limited study suggests that the accuracy of the simplified method approaches that of methods using radar reflectivity data and may have operational value in some special situations.