The Role of Topography on Tropical Cyclogenesis in the Eastern North Pacific

马德雷山脉以西的北太平洋东部地区是热带气旋形成的高发区。风暴的初始位置和盛行的低层风向表明，地形可能在气旋发生中起作用。观测还表明，成熟的热带气旋登陆墨西哥东海岸时产生的次级环流也可能有助于该区域的气旋生成。以往的理论研究表明，东风纬向流与地形的相互作用可能产生东风波，作为触发东太平洋热带气旋形成的初始环流。首席研究员将进行进一步的研究，主要是建模研究，使用模型的层次结构来更好地诊断循环系统的演变。***

The eastern North Pacific, just west of the Sierra Madre Mountains, experiences a high incidence of tropical cyclone formation. The initial location of the storms and the prevailing low-level wind direction suggest that the terrain may play a role in the cyclogenesis. Observations also suggest that secondary circulations generated as mature tropical cyclones make landfall on the east coast of Mexico may contribute to cyclogenesis in the region as well. Previous theoretical studies indicate that the interaction of easterly zonal flows with the terrain may generate easterly waves which serve as the initial circulations that trigger tropical cyclone formation in the eastern Pacific. The principal investigator will conduct further studies, principally modeling studies, using a hierarchy of models to better diagnose the evolution of the circulation systems. ***