Effects of Mesoscale Thermal Forcing in a Shear Flow

对风暴系统的基本了解，以及因此改进的预测，取决于许多相互作用的气象现象知识的进步。在这项研究中，首席研究人员建议调查大气热强迫在具有“临界水平”的气流区域中的影响。临界高度是环境风速与大气扰动传播速度相一致的高度。以前的工作表明，临界水平可以在触发和/或维持对流方面发挥重要作用。首席调查员将利用理论研究和数值模拟来研究热力强迫和具有临界水平的大气流动之间的关系，以及这些关系如何与两个不同的大气风暴系统--中纬度咆哮线和东海岸冬季气旋的形成和维持有关。//

Fundamental understanding of storm systems and, hence, improved predictions depend upon advances in knowledge of many interacting meteorological phenomena. In this study, the Principal Investigator proposes to investigate the effects of atmospheric thermal forcing in flow regimes that posses a "critical level". A critical level is the height at which the velocity of the ambient wind coincides with the propagation speed of atmospheric disturbances. Previous work has shown that critical levels can play an important role in triggering and/or maintaining convection. The Principal Investigator will use both theoretical investigations and numerical modelling to study the relationship between thermal forcing and atmospheric flows with critical levels and how these relate to the formation and maintenance of two diverse atmospheric storm systems -- mid-latitude squall lines and east coast wintertime cyclones. //