The Dynamics of Teleconnection Patterns and Their Relationship with the General Circulation

遥相关模式的动态及其与大气环流的关系

• 批准号: 0649512
• 负责人: Steven Feldstein
• 金额: --
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-02-01 至 2011-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0649512&HistoricalAwards=false
• 关键词: Dynamics; Teleconnection; Patterns; Their; Relationship

The dynamics of teleconnection patterns and their relationship with the general circulationThe month-to-month and year-to-year variability of the lower atmosphere appears in a set of recurrent patterns, denoted teleconnections. Teleconnections mediate the seasonal climate: heat and cold waves; seasonal droughts and periods of flooding. Feldstein will investigate the dynamical mechanisms that set the structures of these patterns and determine their behavior over time. Five specific questions will be addressed:1. What dynamical processes determine how teleconnections vary over time?2. How does the stratosphere influence the leading high-latitude patterns, which organize weather throughout the extratropics?3. Do teleconnection patterns represent distinct regimes or continua of states?4. The zonal-mean jet exhibits periods when it propagates poleward. Can such periods be predicted? If so, what are the implications for forecasting the weather?5. How do storms lead to the development of the leading teleconnection patterns over the North Atlantic and North Pacific Oceans?These questions will be answered by analyzing existing atmospheric data sets together with an extensive set of simulations using an idealized numerical model. The model simulations will include runs with topography and with a resolved stratosphere.A broader impact of the research will be to make available, to the community, the output of the extensive set of model simulations. A graduate student will be trained, and research opportunities will be provided for undergraduate honors students. These studies may ultimately lead to improvements in intraseasonal prediction.

远程连接模式的动态及其与一般循环的关系较低的大气的每月和每年变异性出现在一系列经常性模式中，表示远程连接。远程连接介导季节性气候：热和冷浪波；季节性干旱和洪水时期。 费尔德斯坦（Feldstein）将研究设定这些模式结构并随着时间的推移的行为的动力学机制。将解决五个具体问题：1。哪些动态过程决定了远程连接的变化？2。平流层如何影响领先的高纬度模式，这些高纬度模式在整个室外组织中组织天气？3。远程连接模式是否代表各州的不同政权或连续性？4。 Zonal均值射流表现出传播极点的时期。可以预测这样的时期吗？如果是这样，对天气的预测有何影响？5。风暴如何导致北大西洋和北太平洋领先的远程连接模式的发展？通过分析现有的大气数据集以及使用理想的数值模型的大量模拟来回答这些问题。模型模拟将包括具有地形和分辨率分辨率的运行。该研究的更广泛的影响是向社区提供广泛的模型模拟集合的输出。将对研究生进行培训，并将为本科荣誉学生提供研究机会。这些研究最终可能导致季节内预测的改善。