Distinctive Signals in 1‐min Observations of Overshooting Tops and Lightning Activity in a Severe Supercell Thunderstorm
Distinctive Signals in 1‐min Observations of Overshooting Tops and Lightning Activity in a Severe Supercell Thunderstorm
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强超级单体雷暴中的冲顶和闪电活动 1 分钟观测中的独特信号
DOI：
10.1029/2020jd032856
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Nesbitt, Stephen W.
中科院分区：
文献类型：
--
作者：
Borque, Paloma;Vidal, Luciano;Rugna, Martín;Lang, Timothy J.;Nicora, María Gabriela;Nesbitt, Stephen W.
这项工作研究了2018年12月11日在阿根廷中部发生的一次恶劣天气事件。通过高时间分辨率的观测，分析了风暴从开始、快速组织成超级单体和最终衰变的演变。这项工作提供了对风暴运动学（上升气流面积和寿命），云顶冷却速率和导致恶劣天气的闪电产生的时空协同演化的见解。分析的风暴提出了两个对流周期与相关的恶劣天气。云顶局部最小红外亮温（MinIR）和闪电跃变（LJ）的整体下降先于这两个时期。LJ为恶劣天气的发生提供了最长的提前时间，地面闪电网络提供了约30分钟的最长预警时间。与地面闪电网络的探测相比，地球同步闪电测绘仪（GLM）的闪电计数被低估了。GLM探测效率较低的可能原因包括位于闪电源上方的光学致密介质以及发生的闪电小于GLM的足迹。最小MinIR提供了较短的预警时间，以恶劣天气的发生。然而，在MinIR中，在绝对最小值之前的第二个最小值将此警告时间延长了10分钟以上。MinIR中时间尺度短于6分钟的趋势显示快速冷却和升温的周期较短，这提供了风暴内上升气流生命周期的信息。利用高时间分辨率的观测资料分析对流风暴的演变和强度的优势进行了讨论。
This work examines a severe weather event that took place over central Argentina on 11 December 2018. The evolution of the storm from its initiation, rapid organization into a supercell, and eventual decay was analyzed with high‐temporal resolution observations. This work provides insight into the spatio‐temporal co‐evolution of storm kinematics (updraft area and lifespan), cloud‐top cooling rates, and lightning production that led to severe weather. The analyzed storm presented two convective periods with associated severe weather. An overall decrease in cloud‐top local minima IR brightness temperature (MinIR) and lightning jump (LJ) preceded both periods. LJs provided the highest lead time to the occurrence of severe weather, with the ground‐based lightning networks providing the maximum warning time of around 30 min. Lightning flash counts from the Geostationary Lightning Mapper (GLM) were underestimated when compared to detections from ground‐based lightning networks. Among the possible reasons for GLM's lower detection efficiency were an optically dense medium located above lightning sources and the occurrence of flashes smaller than GLM's footprint. The minimum MinIR provided the shorter warning time to severe weather occurrence. However, the secondary minima in MinIR that preceded the absolute minima improved this warning time by more than 10 min. Trends in MinIR for time scales shorter than 6 min revealed shorter cycles of fast cooling and warming, which provided information about the lifecycle of updrafts within the storm. The advantages of using observations with high‐temporal resolution to analyze the evolution and intensity of convective storms are discussed.
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影响因子：
4.6
作者：
A. Carril;C. Menéndez;A. Remedio;F. Robledo;A. Sörensson;B. Tencer;J. Boulanger;M. Castro;D. Jacob;H. Treut;L. Li;O. Penalba;S. Pfeifer;M. Rusticucci;P. Salio;P. Samuelsson;E. Sánchez;P. Zaninelli
通讯作者：
A. Carril;C. Menéndez;A. Remedio;F. Robledo;A. Sörensson;B. Tencer;J. Boulanger;M. Castro;D. Jacob;H. Treut;L. Li;O. Penalba;S. Pfeifer;M. Rusticucci;P. Salio;P. Samuelsson;E. Sánchez;P. Zaninelli
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影响因子：
5.2
作者：
G. Marion;R. Trapp;S. Nesbitt
通讯作者：
S. Nesbitt
使用 AMIE/DYNAMO 现场活动期间收集的数据评估与马登-朱利安振荡相关的云群的对流允许模型模拟
DOI：
10.1002/2014jd022143
发表时间：
2014
期刊：
Journal of Geophysical Research: Atmospheres
影响因子：
--
作者：
S. Hagos;Zhe Feng;C. Burleyson;K. Lim;C. Long;Di Wu;G. Thompson
通讯作者：
G. Thompson
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影响因子：
2.9
作者：
Paloma Borque;P. Salio;M. Nicolini;Yanina García Skabar
通讯作者：
Yanina García Skabar
根据卫星观测和云顶地块模型推断的雷暴云顶动态
DOI：
--
发表时间：
1986
期刊：
影响因子：
--
作者：
R. Adler;R. Mack
通讯作者：
R. Mack