Tropical Intraseasonal Variability in Models and Observations

该项目采用观测诊断和模式实验的平衡，试图提高我们对热带季节内变率（ISV）基本特征的理解，以改进全球大气模式对这些特征的模拟。这将通过研究与ISV相关的降水、风速和潜热通量异常以及ISV对热带天气尺度变率的调制之间的耦合机制来实现。基于观测的研究侧重于利用卫星资料检验isv相关降水、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。模式敏感性研究将集中于利用不同复杂性的海洋模式研究水分-对流反馈、水分-辐射反馈、风-蒸发反馈的机制以及海洋-大气耦合的作用。更广泛的影响包括研究生培训和课程改进。

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.