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Mesoscale Ensemble Experiments on Potential Parameters for Tornado Outbreak

机译：龙卷风爆发潜在参数的中尺度集合实验

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References(11) Cited-By(2) Supplementary materials(2) Energy Helicity Index (EHI), defined by the product of Convective Available Potential Energy (CAPE) and Storm Relative Environmental Helicity (SREH), is one of potential parameters to diagnose the possibility of tornado outbreak. In this study, probabilities that EHI exceed some criteria were examined with a mesoscale ensemble prediction system, whose grid interval was 15 km, in two tornado events in Japan (Nobeoka and Saroma tornado events). High probability regions (HPR, hereafter) of large SREH existed in the northeastern quadrants of a typhoon or a low-pressure system, while HPRs of large CAPE extended along the warm humid airflow from the Pacific Ocean. In the two events, the tornados were formed near HPRs of large EHI, where HPRs of large SREH and CAPE were overlapped. This result indicates the possibility of the probability forecast of the potential parameter for tornado outbreak.
机译：参考文献（11）引用依据（2）补充材料（2）由对流有效位能（CAPE）和风暴相对环境螺旋度（SREH）乘积定义的能量螺旋指数（EHI）是诊断的潜在参数之一龙卷风爆发的可能性。在这项研究中，在日本的两次龙卷风事件（延冈和萨罗玛龙卷风事件）中，使用网格间隔为15 km的中尺度集合预测系统检查了EHI超出某些标准的概率。在台风或低压系统的东北象限中存在大型SREH的高概率区域（以下称HPR），而大型CAPE的HPR沿太平洋的温暖湿润气流延伸。在这两次事件中，龙卷风在大型EHI的HPR附近形成，大型SREH和CAPE的HPR重叠。该结果表明可能预测龙卷风爆发的潜在参数。

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