Tropical Intraseasonal Variability in Models and Observations

模型和观测中的热带季节内变化

• 批准号: 0632341
• 负责人: Eric Maloney
• 金额: $ 36.13万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-10-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0632341&HistoricalAwards=false
• 关键词: Tropical; Intraseasonal; Variability; Models; Observations

The project applies a balance of observational diagnosis and model experimentation to try to improve our understanding of fundamental features of tropical intra-seasonal variability (ISV) to improve the simulations of these features in global atmospheric models. This is to be accomplished by examining the coupling mechanism between ISV-associated precipitation, wind speed and latent heat flux anomalies, and the modulation of tropical synoptic-scale variability by the ISV. Observation-based studies focus on examination of the coupling between ISV-related precipitation, wind speed, and surface heat flux anomalies and their relation to shorter synoptic-scale variations using satellite data. Model sensitivity studies will focus on mechanisms of moisture-convection feedback, moisture-radiation feedback, wind-evaporation feedback, and the role of ocean-atmosphere coupling using ocean models of varying complexity. Broader impacts include graduate student training and curriculum enhancement.

该项目采用观测诊断和模型实验的平衡，试图提高我们对热带季节内变化（ISV）的基本特征的理解，以改善全球大气模型中这些特征的模拟。 这是通过检查与ISV相关的降水，风速和潜热通量异常之间的耦合机制，以及由ISV的热带天气尺度变率的调制来完成的。 基于观测的研究侧重于利用卫星数据检查与ISV相关的降水、风速和地表热通量异常之间的耦合及其与较短天气尺度变化的关系。 模型敏感性研究将侧重于水分对流反馈、水分辐射反馈、风蒸发反馈的机制，以及使用不同复杂程度的海洋模型进行的海洋-大气耦合作用。 更广泛的影响包括研究生培训和课程改进。