Dynamics of Tropical Cyclones and the Hadley Circulation

热带动力学的几个方面仍然知之甚少，包括飓风中的位涡混合过程，以及飓风和热带辐合带（ITCZ）中对流尺度位涡生成的细节。 在这个奖项下，舒伯特博士寻求增加动力学的理解，并提高热带环流数值模拟的准确性。在飓风内部，最近的研究表明，有一些小尺度的、看似无关的现象与位涡混合有关，如中涡和多边形眼墙，它们具有一些共同的特征。 舒伯特博士将采用理论和数值模型的层次结构，从一个非辐散正压模型，采用非流体静力学，“全物理”方程来探索它们。 这项研究的令人兴奋的新方面将是在模式中纳入湿过程。第二个研究领域是使用一个完整的物理模型来探索哈德利环流和ITCZ的各个方面。 特别感兴趣的是云冰过程中的环流的作用和敏感性的云微物理参数化的性质在模型中的研究。这项研究，虽然高度理论化和理想化的模式进行，是至关重要的，以推进热带环流的基本动力学的理解。

Several aspects of tropical dynamics that are still poorly understood are the potential vorticity mixing processes in hurricanes and the details of the convective-scale generation of potential vorticity in both hurricanes and the Intertropical Convergence Zone (ITCZ). Under this award, Dr. Schubert seeks to increase dynamical understanding and to improve the accuracy of numerical simulations of tropical circulations. Within hurricanes, recent work has shown that there are smaller-scale, seemingly unrelated, phenomena associated with potential vorticity mixing such as mesovortices and polygonal eyewalls which have some common characteristics. Dr. Schubert will employ a hierarchy of theoretical and numerical models, from a nondivergent barotropic model to one that employs the nonhydrostatic, "full-physics" equations to explore them. The exciting new aspect of this study will be the incorporation of moist processes in the models. A second area of investigation is to use a version of the full physics model to explore aspects of the Hadley circulation and the ITCZ. Of particular interest is the study of the role of cloud ice processes in the circulations and the sensitivity to the nature of the cloud microphysics parameterizations employed in the models. This research, while highly theoretical and conducted with idealized models, is critical to advance the understanding of the basic dynamics of tropical circulations.