Using Overshooting Top Area to Discriminate Potential for Large, Intense Tornadoes
Using Overshooting Top Area to Discriminate Potential for Large, Intense Tornadoes
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利用超调顶部区域来区分大型、强烈龙卷风的可能性
DOI：
10.1029/2019gl084099
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发表时间：
2019
影响因子：
5.2
通讯作者：
S. Nesbitt
中科院分区：
文献类型：
--
作者：
G. Marion;R. Trapp;S. Nesbitt
最近的研究建立了风暴上升气流宽度和龙卷风强度之间的强烈联系，表明上升气流宽度可以用来测量潜在的龙卷风强度。它还假定，超射顶部区域(OTA)可以用作上升气流宽度的模拟，从而作为评估观测到的风暴中潜在龙卷风强度的一种手段。新的高分辨率GOES-R系列卫星的实施为在恶劣天气观测中调查这些发现提供了一个独特的机会。本文探讨了一种利用GOES-16长波红外卫星资料定量计算龙卷风OTA的方法。将观测到的龙卷风强度与OTA进行比较，得出了很强的相关性(R2=0.54)。这些结果表明，无论风暴模式、季节性或地理位置如何，这些量化方法都有可能用于龙卷风风暴的实时观测，从而使预报员能够确定哪些风暴对生命和财产构成最大的风险。
Recent work established strong links between storm updraft width and the tornado intensity, suggesting that updraft width could be used to gauge potential tornado intensity. It was also posited that overshooting top area (OTA) could be used as an analog for updraft width and, thus, as a means to assess potential tornado intensity in observed storms. The implementation of new high‐resolution GOES‐R series satellites presents a unique opportunity to investigate these findings in severe weather observations. Herein, a method using GOES‐16 longwave infrared satellite data to quantify OTA of tornadic storms is explored. A comparison between observed tornado strength and OTA yields a strong correlation (R2 = 0.54). These results show the potential of these quantifications to be used with real‐time observations of tornadic storms, irrespective of storm mode, seasonality, or geographic location, allowing forecasters to determine which storms pose the highest risk to life and property.