Composite VORTEX2 Supercell Environments from Near-Storm Soundings
Composite VORTEX2 Supercell Environments from Near-Storm Soundings
复制标题
来自近风暴探测的复合 VORTEX2 超级单体环境
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
M. Parker
中科院分区：
文献类型：
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作者：
M. Parker
利用第二次验证龙卷风旋转起源实验（VORTEX2）的134个探测资料进行的三维合成分析揭示了超级单体雷暴环境中近风暴变率的本质。根据完整的分析，似乎垂直风切变会随着流入扇区内的超级单体的接近而增加，为超级单体的维持（可能还有龙卷风的形成）提供了有利条件，尽管风暴附近有少量的低空冷却。七个分析龙卷风超级单体有一个复合环境，显然是更令人印象深刻的（在广泛使用的指标）比五个分析的非龙卷风超级单体，包括更多的对流可用位能（CAPE），更多的垂直风切变，更高的边界层相对湿度，和较低的对流层水平涡度，这是在近风暴流入流向。提出了目前广泛应用的超单体复合参数（SCP）和龙卷风的重要参数。
AbstractThree-dimensional composite analyses using 134 soundings from the second Verification of the Origins of Rotation in Tornadoes Experiment (VORTEX2) reveal the nature of near-storm variability in the environments of supercell thunderstorms. Based upon the full analysis, it appears that vertical wind shear increases as one approaches a supercell within the inflow sector, providing favorable conditions for supercell maintenance (and possibly tornado formation) despite small amounts of low-level cooling near the storm. The seven analyzed tornadic supercells have a composite environment that is clearly more impressive (in terms of widely used metrics) than that of the five analyzed nontornadic supercells, including more convective available potential energy (CAPE), more vertical wind shear, higher boundary layer relative humidity, and lower tropospheric horizontal vorticity that is more streamwise in the near-storm inflow. The widely used supercell composite parameter (SCP) and significant tornado param...