Tropical Cyclogenesis within Equatorial Waves

该项目的主要目标是对观察到多个热带气旋形成的热带波包进行个案研究。特别令人感兴趣的是赤道Rossby波和西太平洋的混合Rossby重力波。在早期的工作中发现，两个长寿命波包总共产生了14个热带气旋。在新的工作中，将研究这些波包的形成，维持和衰减，以及热带气旋如何，何时和何地在其中形成。智力价值：PI将（1）评估现有理论对拉伸变形、垂直风切变和向中纬度发散对波包行为的作用，（2）尝试将预报员对西太平洋热带气旋生成的观点与结合了热带波动理论的框架相联系。完成这项工作将提供：1.改进热带气旋预报的潜力; 2.更广泛的影响：该项目为本科生和研究生提供热带气旋和赤道波领域的学习经验和培训。

The primary objective of this project is to carry out case studies of tropical wave packets within which multiple tropical cyclones are observed to form. Of particular interest are equatorial Rossby waves and mixed Rossby gravity waves in the western Pacific Ocean. In earlier work it was found that two long-lived wave packets produced a total of 14 tropical cyclones. In the new work, the initiation, maintenance, and decay of such wave packets will be studied, as well as how, when, and where tropical cyclones form within them.Intellectual merit: The PI will (1) perform an evaluation of existing theory on the role of stretching deformation, vertical wind shear, and emanation to middle latitudes on the behavior of the wave packets, and (2) attempt to connect the forecaster's view of western Pacific tropical cyclogenesis with a framework that incorporates tropical wave theory. Completion of this work will offer:1. the potential to improve forecasting of tropical cyclones, and 2. the introduction of an equatorial wave paradigm into tropical forecasting.Broader impacts: This project provides learning experiences and training for undergraduate and graduate-level students in the field of tropical cyclones and equatorial waves.