Tropical-extratropical Interactions in a Hierarchy of Atmospheric Models

将建立一系列理想化的大尺度大气模型。 模型的范围从准地转β-平面模型，干燥的原始方程模型的球体上，理想化的潮湿的原始方程模型的球体上，所有的纬向对称的气候。 这些模型将用于研究大气环流理论中与气候变化研究以及天气和气候预报模型开发有关的一些问题。 研究的动力学问题可分为两类：1）中纬急流位置对Hadley环流强度、地面摩擦强度、平流层极涡、对流层顶高度和大气中水汽含量等因素的敏感性;热带环流特征（如Hadley环流和热带辐合带位置）的强度对热带气旋的敏感性地球能量平衡在高纬度和低纬度的扰动。 总体目标是帮助缩小理想化的大气环流理论与综合大气环流模型实践的高端建模之间的差距。模型的层次结构将作为社区的资源提供。 这一资源应该对大学社区的教育以及研究具有价值，特别是对年轻研究人员和模型开发资源有限的研究人员。

A hierarchy of idealized large-scale models of the atmosphere will be constructed. The models range from quasi-geostrophic beta-plane models, to dry primitive equation models on the sphere, to idealized moist primitive equation models on the sphere, all with zonally symmetric climates. These models will be used to study a number of problems in general circulation theory that are relevant to both climate change studies and to weather and climate forecast model development. The dynamical problems to be studied fall into two classes: 1) the sensitivity of the position of the mid-latitude jet streams to such factors as the strength of the Hadley cell, the strength of surface friction, the stratospheric polar vortex, the tropopause height, and the amount of water vapor in the atmosphere; and 2) the sensitivity of the strength of tropical circulation features such as the Hadley cell and the position of the InterTropical Convergence Zone (ITCZ) to perturbations to the Earth's energy balance in both high and low latitudes. The overall goal is to help close the gap between idealized theories of the general circulation and the high-end modeling that is practiced with comprehensive general circulation models.The hierarchy of models will be made available as a resource to the community. This resource should be of value for education in the university community, as well as to research, particularly to young researchers and those with limited model development resources.