Mixing and Transport in the Upper Troposphere and Lower Stratosphere

对流层上层和平流层下层的混合和输送

• 批准号: 0527385
• 负责人: Richard Scott
• 金额: $ 27.3万
• 依托单位: NorthWest Research Associates, Incorporated
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-10-01 至 2008-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0527385&HistoricalAwards=false
• 关键词: Mixing; Transport; Upper; Troposphere; Lower

The upper troposphere/lower stratosphere (UTLS) is a transit region, the dynamics of which is still insufficiently understood. This research seeks to address a range of questions concerning the dynamics of the UTLS, the resulting impacts on UTLS tracers (H20 and O3), and dynamical forcing by the two tracers on the UTLS. A simple, yet dynamically consistent model will be used to generate flows and to isolate and understand associated transport processes and mixing regimes. An underlying theme is the search for an accurate description of the small-scale structures resulting from typical mixing processes in the UTLS region.Intellectual merit. The PI will improve our fundamental understanding of mixing and transport processes in the UTLS region. Particular attention will be paid to the mixing and transport of radiatively and chemically important trace species, stratosphere-troposphere exchange, the transport of water vapor from the tropics to the extratropics, and transport by monsoon circulations. Completion of this work will offer new insights into:1. Mixing processes and the resulting fine-scale constituent distributions in the UTLS region, and 2. Further understanding of climate sensitivity to dynamics of UTLS.Broader impacts. The issues addressed by this research are fundamental to our understanding of the mixing and transport processes in the UTLS on a range of spatial and temporal scales, an area of much recent research. A new flux parameterization may be developed. This work is closely related to key initiatives of the Stratospheric Processes And their Role in Climate (SPARC) project, a component of the World Climate Research Program.

对流层上部/平流层下部（UTLS）是一个过境区域，其动态仍然没有得到充分的了解。这项研究旨在解决一系列问题，有关UTLS的动态，对UTLS示踪剂（H20和O3）的影响，以及两种示踪剂对UTLS的动力学强迫。一个简单的，但动态一致的模型将被用来产生流量和隔离和了解相关的运输过程和混合制度。一个基本的主题是寻找一个准确的描述的小尺度结构所产生的典型混合过程中的UTLS区域。PI将提高我们对UTLS区域混合和传输过程的基本理解。将特别关注具有辐射和化学重要性的微量物质的混合和输送、平流层-对流层交换、水蒸气从热带到热带外的输送以及季风环流的输送。这项工作的完成将提供新的见解：1。混合过程和由此产生的细尺度组分分布在UTLS区域，和2。进一步了解气候对UTLS动态的敏感性。这项研究所解决的问题是根本的混合和运输过程中的UTLS在一系列的空间和时间尺度，最近的研究领域的理解。可能会开发新的通量参数化。这项工作与平流层过程及其在气候中的作用项目的关键举措密切相关，该项目是世界气候研究计划的一个组成部分。