Collaborative Research: Analysis and Modeling of Convectively-Coupled Equatorial Waves and the Madden-Julian Oscillation

热带扰动对天气和气候有全球影响，因此，重要的是在一般环流模式中很好地反映它们的动态。本研究的目的是利用观测和模拟资料以及统计分析方法，详细研究两种类型的热带大气扰动--对流耦合赤道波(CCEW)和马登-朱利安振荡(MJO)的动力结构。此外，利用拉格朗日海洋模式，还将研究上层海洋对MJO风扰动的响应。将解决的三个突出问题是：(1)关于CCEW和MJO的机制和相互作用的多种相互冲突的理论的存在，(2)CCEW和MJO在全球模式中的表示的不足，以及(3)由MJO相关的风扰动所强迫的海洋开尔文波行为的不确定性。智力优势：PI将执行：(1)对CCEW和MJO的机制和相互作用的多种相互冲突的理论的存在的分析；(2)评估CCEW和MJO在GCM中的表示的不足；(3)MJO相关风扰动所强迫的海洋开尔文波行为的不确定性分析。更广泛的影响：这项研究将提高我们对CCEW的观测理解，并将导致改进的大气环流模式模拟。该项目将为两名研究生在大气科学方面的职业生涯做准备。

Tropical disturbances have a global impact on weather and climate and for this reason, it is important that their dynamics are well represented in general circulation models. The aim of the research is to study in detail the dynamical structures of two types of tropical atmospheric disturbances, convectively coupled equatorial waves (CCEWs) and the Madden-Julian oscillation (MJO), using observational and modeled data, and statistical analysis methods. Further, using a Lagrangian ocean model, upper ocean response to the MJO wind perturbations will also be studied. Three outstanding problems that will be addressed are (1) the existence of multiple conflicting theories for the mechanisms and interactions of CCEWs and the MJO, (2) the inadequacy of representations of CCEWs and MJOs in global models, and (3) uncertainties in the behavior of oceanic Kelvin waves forced by MJO-related wind perturbations.Intellectual merit: The PI will perform: (1) the analysis of the existence of multiple conflicting theories for the mechanisms and interactions of CCEWs and the MJO; (2) evaluate the inadequacy of representations of CCEWs and MJOs in GCMs; and (3) the analysis of uncertainties in the behavior of oceanic Kelvin waves forced by MJO-related wind perturbations. Broader Impacts: The research will improve our observational understanding of CCEWs and will lead to improved general circulation model simulations. This project will prepare two graduate students for careers in atmospheric sciences.