Dynamical Influences of Anvil Shading on Simulated Supercell Thunderstorms
Dynamical Influences of Anvil Shading on Simulated Supercell Thunderstorms
复制标题
砧遮蔽对模拟超级单体雷暴的动力学影响
DOI：
10.1175/mwr-d-12-00146.1
复制
发表时间：
2013
影响因子：
3.2
通讯作者：
P. Markowski
中科院分区：
文献类型：
--
作者：
Jeffrey Frame;P. Markowski
使用先进的区域预测系统（ARP）模型，对超级电池雷暴进行了抽象的模拟，以研究低级空气温度在芯片阴影中的定义如何影响模拟的风暴。太阳加热会使垂直混合抑制并稳定近距离的层，并在固定风暴的情况下修饰近表面的垂直风剪切。云辐射的辐射和排放没有显着影响模拟的超级电池。
AbstractNumerical simulations of supercell thunderstorms including parameterized radiative transfer and surface fluxes are performed using the Advanced Regional Prediction System (ARPS) model to investigate how low-level air temperature deficits within anvil shadows affect the simulated storms. The maximum temperature deficits within the modeled cloud shadows are 1.5–2.0 K, which is only about half that previously observed. Within the shadows, the loss of strong solar heating cools and stabilizes the near-surface layer, which suppresses vertical mixing and modifies the near-surface vertical wind shear. In a case of a stationary storm, the enhanced easterly shear present beneath the anvil leads to a thinning of the outflow layer and corresponding acceleration of the rear-flank gust front far ahead of the overlying updraft, weakening the low-level mesocyclone. It is further shown that the direct absorption and emission of radiation by clouds does not significantly affect the simulated supercells. Varying th...