Idealized Modelling of Stratospheric Impacts on Weather and Climate

平流层对天气和气候影响的理想化建模

• 批准号: 0839843
• 负责人: Lorenzo Polvani
• 金额: $ 50万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-01-15 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0839843&HistoricalAwards=false
• 关键词: Idealized; Modelling; Stratospheric; Impacts; Weather

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.

人们日益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，平流层条件可能会影响天气和气候。在以前的国家科学基金会的支持下，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，研究将进一步调查平流层对天气和气候的影响，重点是理想化的模拟研究。这些研究旨在补充最先进的气候模式所做的工作。理想化气候模型与综合气候模型的不同之处在于物理参数化已被高度简化;这允许探索参数空间敏感性并建立计算结果的数值稳健性。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，包括它们对布鲁尔-多布森环流的影响，并研究平流层突然变暖的动力学和可预报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以下重要任务的贡献：这些活动包括：确定气候变化的作用，特别是平流层的作用;利用平流层状况的知识可能改进长期天气预报;为开发和改进综合气候模型作出贡献;与国际研究工作建立联系;以及培训博士后科学家和研究生及本科生。