Laboratory and Theoretical Studies of the Effects of Parameter Variations on Flow over Topography

9318137 Pfeffer首席调查员将通过一系列旋转环的实验室实验，对大气中的定常波和瞬变波的行为进行调查。这项研究代表了环带工作的继续，并辅之以诊断和理论分析。特别是，PIS将探索基本态位涡梯度和潜热释放对波浪行为的影响，以及当地形诱导的中纬度波遇到具有不同流型(反射或吸收)的热带时的命运。在进行实验室实验时，PI将测试产生潜在涡度梯度的新技术，以及模拟所谓临界线上的潜热释放和波吸收的新技术。这些实验，结合诊断和模型研究，应该会为关于行星尺度大气波动行为的仍未解决的问题提供见解。***

9318137 Pfeffer The principal investigators will conduct an investigation into the behavior of stationary and transient waves in the atmosphere through a series of laboratory experiments with a rotating annulus. This research represents a continuation of work with the annulus which is complemented by diagnostic and theoretical analyses. In particular, the PIs will explore the effects of the basic state potential vorticity gradient and latent heat release on wave behavior as well as the fate of topographically-induced midlatitude waves as they encounter the tropics with its different flow regime (reflection or absorption). In conducting the laboratory experiments, the PIs will test new techniques for creating the potential vorticity gradients and for simulating latent heat release and wave absorption at the so-called critical line. These experiments, combined with the diagnostic and modeling studies, should provide insights into still unresolved questions about planetary scale atmospheric wave behavior. ***