CAREER: The Atmospheric Energy Variability of Tropical-Extratropical Interactions Associated with the Madden–Julian Oscillation and Equatorial Waves

职业：与马登朱利安涛动和赤道波相关的热带-温带相互作用的大气能量变化

• 批准号: 2045542
• 负责人: Naoko Sakaeda
• 金额: $ 65.2万
• 依托单位: University of Oklahoma Norman Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-07-01 至 2026-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2045542&HistoricalAwards=false
• 关键词: CAREER; Atmospheric; Energy; Variability; Tropical

Organized tropical convection can produce modes of variability on the intraseasonal timescale. Two prominent tropical modes are the Madden-Julian Oscillation (MJO) and the convectively coupled equatorial waves (CCEWs). They can generate disturbances that influence the extratropical atmosphere (i.e., the mid-latitude storm track and extreme weather events). Conversely, midlatitude atmospheric disturbances can propagate into the tropics to influence the MJO and CCEWs. This project aims to improve our understanding of the tropical-extratropical interactions associated with the MJO and CCEWs. Emerging results have the potential to improve subseasonal-to-seasonal prediction, enhance the nation’s capability for weather forecasting, and advance our understanding of climate change. The project activities include the training of underrepresented students in research and broadening interests in atmospheric science among K-12 students in Oklahoma. These activities will inspire the next generation of diverse scientists.The underlying mechanisms of the tropical-extratropical interactions associated with the MJO and CCEWs are still unclear. The main research goal is to understand the physical processes underlying these interactions from the energetics perspectives. The project intends to reveal (1) the atmospheric energy variability associated with tropical-extratropical interactions, (2) the role of energy exchanges among weather-to-climate timescales, and (3) how much of the tropical and extratropical kinematic and thermodynamic variabilities are sustained by their interactions. The investigator will analyze reanalysis and satellite data using various diagnostic techniques to understand the mechanisms that maintain global energy anomalies associated with the MJO and CCEWs. The project will integrate a K-12 summer in-person course that blends art and science to educate about the global atmospheric circulation including tropical-extratropical interactions. The developed educational activity modules will be shared online and through K-12 teacher training workshops. These research and educational activities serve as the foundation of the investigator’s career-long vision to advance and broadly disseminate the knowledge of tropical-extratropical interactions.This project is jointly funded by the division of Atmosphere and Geospace Science (AGS) under the Climate and Large-Scale Dynamics (CLD) program and the Established Program to Stimulate Competitive Research (EPSCoR).This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

有组织的热带对流可以在季节内时间尺度上产生变化模式，即马登-朱利安振荡（MJO）和对流耦合赤道波（CCEW），它们可以产生影响温带大气（即中层）的扰动。 -纬度风暴路径和极端天气事件）。离线、中纬度大气扰动可以传播到热带地区，从而影响 MJO 和 CCEW。提高我们对与 MJO 和 CCEW 相关的热带-温带相互作用的了解 新兴结果有可能改善次季节到季节的预测，提高国家的天气预报能力，并增进我们对气候变化的了解。包括对俄克拉荷马州 K-12 学生进行研究培训和扩大对大气科学的兴趣。这些活动将激励下一代不同的科学家。与热带-温带相互作用相关的潜在机制。 MJO 和 CCEW 的主要研究目标是从能量学角度了解这些相互作用背后的物理过程，该项目旨在揭示 (1) 与热带-温带相互作用相关的大气能量变化，(2) 的作用。天气与气候时间尺度之间的能量交换，以及（3）有多少热带和温带运动学和热力学变异是由它们的相互作用维持的。调查人员将使用各种诊断技术来分析再分析和卫星数据，以了解这些变化。维持与 MJO 和 CCEW 相关的全球能源异常的机制 该项目将整合 K-12 夏季面对面课程，该课程融合了艺术和科学，以教育有关全球大气环流（包括热带与温带相互作用）的知识。这些研究和教育活动是研究者推进和广泛传播热带-温带相互作用知识的职业愿景的基础。气候与大尺度动力学 (CLD) 计划和刺激竞争性研究既定计划 (EPSCoR) 下的大气和地球空间科学 (AGS) 部门。该奖项反映了 NSF 的法定使命，并通过使用评估结果被认为值得支持基金会的智力价值和更广泛的影响审查标准。