Polarimetric Variability of Classic Supercell Storms as a Function of Environment
Polarimetric Variability of Classic Supercell Storms as a Function of Environment
复制标题
经典超级单体风暴的极化变化随环境的变化
DOI：
10.1175/jamc-d-15-0346.1
复制
发表时间：
2016
影响因子：
3
通讯作者：
S. Matthew
中科院分区：
文献类型：
--
作者：
V. Broeke;S. Matthew
摘要经典的超级单体风暴发生在一个普遍理解的环境中，其特征是不稳定和垂直风切变。在这种广泛有利的环境中，环境参数的大的日常变化可能导致风暴的雷达呈现大不相同。这里感兴趣的是，特定的风暴结构是否在类似的环境中表现出可重复的特征，以及是否可以用环境特征的知识来预测雷达呈现。具体而言，本文侧重于（i）上升气流特征推断使用差分反射率ZDR列，（ii）风暴相对流入推断使用ZDR弧的特点，和（iii）的面积范围和周期性的偏振推断冰雹在低层。这些雷达功能的变化之间的风暴在类似的环境中，并在一个更大的子集的风暴在高度变化的环境进行比较。在相似和不同的环境中的风暴的相似性进行了量化，一个…
AbstractClassic supercell storms occur in a generally well understood environment characterized by instability and vertical wind shear. Within this broadly favorable environment, large day-to-day variability in environmental parameters may lead to widely varying radar presentation of storms. Of interest here is whether specific storm structures exhibit repeatable characteristics in similar environments and whether radar presentation can be predicted with knowledge of environmental characteristics. Specifically, this paper focuses on (i) updraft characteristics inferred using differential reflectivity ZDR columns, (ii) characteristics of storm-relative inflow inferred using ZDR arcs, and (iii) areal extent and cyclicality of polarimetrically inferred hailfall at low levels. Variability of these radar features is compared among storms in similar environments and among a larger subset of storms across highly varying environments. The similarity of storms in similar and different environments is quantified, a...