Large-Scale Dynamics and the Maintenance and Variability of the Hydrological Cycle of the Troposphere

PI将解决大尺度动力学，特别是斜压涡旋，如何有助于对流层水文循环的维持和变化的问题。PI将研究：（i）斜压涡旋相对于平均环流在输送水汽和维持全球尺度水汽分布方面的重要性;（ii）斜压涡旋输送水汽如何取决于环流特征，如极赤道温度梯度和对流层热力结构;以及（iii）水汽和潜热释放的存在如何影响斜压涡旋的尺度、结构和输送特性。PI将通过分析观测数据和用理想化的大气环流模式进行模拟来解决这些问题。一名博士后和一名研究生将参与这项研究。

The PI will address the question of how large-scale dynamics, and in particular baroclinic eddies, contribute to the maintenance and variability of the hydrological cycle of the troposphere. The PI will study: (i) how important baroclinic eddies are relative to mean circulations in transporting water vapor and in maintaining the global-scale water vapor distribution; (ii) how water vapor transport by baroclinic eddies depends on circulation characteristics such as the pole-to-equator temperature gradient and the thermal structure of the troposphere; and (iii) how the presence of water vapor and latent heat release affects scales, structures, and transport properties of baroclinic eddies. The PI will address these questions by means of analyses of observational data and simulations with an idealized general circulation model. A postdoctoral associate and a graduate student will participate in this research.