A 20-Year Climatology of Nocturnal Convection Initiation over the Central and Southern Great Plains during the Warm Season
A 20-Year Climatology of Nocturnal Convection Initiation over the Central and Southern Great Plains during the Warm Season
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DOI：
10.1175/mwr-d-16-0340.1
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发表时间：
2017-04
影响因子：
3.2
通讯作者：
D. Reif;H. Bluestein
中科院分区：
文献类型：
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作者：
D. Reif;H. Bluestein
摘要 大平原中部的夜间最大降雨量和雷暴活动已被广泛记录，但该地区夜间雷暴发展的机制仍不清楚。地表锋锋边界上方的高对流是一种解释，但这项研究表明，许多雷暴是在夜间形成的，而不存在高额逆温或附近地表边界。这项研究记录了 1996 年至 2015 年 4 月至 7 月期间大平原中部夜间对流启动 (CI) 事件。记录了风暴类型、线性系统方向、引发时间和位置等风暴特征。一旦所有案例都被记录下来，就会检查表面数据以定位任何附近的表面边界。记录了事件相对于这些边界（如果存在边界）的起始位置。确定了相对于表面边界的两个主要引发位置：在表面上......
AbstractA nocturnal maximum in rainfall and thunderstorm activity over the central Great Plains has been widely documented, but the mechanisms for the development of thunderstorms over that region at night are still not well understood. Elevated convection above a surface frontal boundary is one explanation, but this study shows that many thunderstorms form at night without the presence of an elevated frontal inversion or nearby surface boundary.This study documents convection initiation (CI) events at night over the central Great Plains from 1996 to 2015 during the months of April–July. Storm characteristics such as storm type, linear system orientation, initiation time and location, and others were documented. Once all of the cases were documented, surface data were examined to locate any nearby surface boundaries. The event’s initiation location relative to these boundaries (if a boundary existed) was documented. Two main initiation locations relative to a surface boundary were identified: on a surface...