Idealized Modelling of Stratospheric Impacts on Weather and Climate

人们越来越认识到平流层是气候系统的一个重要组成部分。观测和模拟研究表明，平流层条件可能同时影响天气和气候。在之前的国家科学基金会的支持下，这位研究人员在几个方面进行了工作，以阐明平流层对对流层环流的影响。在这个项目中，研究将进一步研究平流层对天气和气候的影响，重点是理想化的模型研究。这些研究旨在补充使用最先进的气候模型所做的工作。理想气候模式与综合气候模式的不同之处在于物理参数化高度简化；这允许对参数空间敏感性的探索，并建立计算结果的数值鲁棒性。这些理想模式将用于研究平流层臭氧和温室气体对平流层-对流层耦合系统环流的影响，包括它们对Brewer-Dobson环流的影响，以及平流层突然变暖的动力学和可预测性及其对对流层环流和天气预报的影响。该项目的更广泛影响包括：对归因气候变化这一重要任务的贡献，特别是对平流层作用的贡献，利用平流层条件的知识可能改进大范围天气预报，对开发和改进综合气候模式的贡献，与国际研究工作的联系，以及对博士后科学家、研究生和本科生的培训。

The stratosphere is increasingly recognized as an important component of the climate system. Observational and modeling studies show that stratospheric conditions may be able to influence both weather and climate. Under previous National Science Foundation support, the researcher has worked on several fronts to elucidate the influences of the stratosphere on the tropospheric circulation. In this project, the research will further investigate the stratospheric impacts on weather and climate by focusing on idealized modeling studies.These studies are intended to complement work done with state-of-the art climate models. Idealized climate models differ from comprehensive climate models in that the physical parameterizations have been highly simplified; this permits explorations of parameter space sensitivities and establishes the numerical robustness of the computed results. These idealized models will be used to study the impact of stratospheric ozone and greenhouse gases on the circulation of the coupled stratosphere-troposphere system, including their effects on the Brewer-Dobson circulation, and to investigate the dynamics and predictability of stratospheric sudden warmings and their impacts on the tropospheric circulation and weather forecasts.The broader impacts of this project include contributions to the important task of attributing climate change, specifically, the stratospheric role, the possible improvement of extended-range weather forecasts from using knowledge of stratospheric conditions, contributions to the development and improvement of comprehensive climate models, links to international research efforts, and the training of postdoctoral scientists and graduate and undergraduate students.